Academic literature on the topic 'Tectona'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Tectona.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Tectona"
1
Bundhun, Digvijayini, Ruvishika S. Jayawardena, and Erio Camporesi. "Introducing Nigrograna italica sp. nov. (Nigrogranaceae) from Corylus avellana and Valsaria tectonae sp. nov. (Valsariaceae) from Tectona grandis." Phytotaxa 618, no. 2 (2023): 103–19. https://doi.org/10.11646/phytotaxa.618.2.1.
Full textAbstract:
Bundhun, Digvijayini, Jayawardena, Ruvishika S., Camporesi, Erio (2023): Introducing Nigrograna italica sp. nov. (Nigrogranaceae) from Corylus avellana and Valsaria tectonae sp. nov. (Valsariaceae) from Tectona grandis. Phytotaxa 618 (2): 103-119, DOI: 10.11646/phytotaxa.618.2.1, URL: http://dx.doi.org/10.11646/phytotaxa.618.2.1
2
Doilom, Mingkwan, Lucas A. Shuttleworth, Jolanda Roux, Ekachai Chukeatirote, and Kevin D. Hyde. "Barriopsis tectonae sp. nov. a new species of Botryosphaeriaceae from Tectona grandis (teak) in Thailand." Phytotaxa 176, no. 1 (2014): 81–91. https://doi.org/10.11646/phytotaxa.176.1.10.
Full textAbstract:
Doilom, Mingkwan, Shuttleworth, Lucas A., Roux, Jolanda, Chukeatirote, Ekachai, Hyde, Kevin D. (2014): Barriopsis tectonae sp. nov. a new species of Botryosphaeriaceae from Tectona grandis (teak) in Thailand. Phytotaxa 176 (1): 81-91, DOI: 10.11646/phytotaxa.176.1.10, URL: http://dx.doi.org/10.11646/phytotaxa.176.1.10
3
Shukla, Nivedita, Manmeet Kumar, Akanksha, et al. "Tectone, a New Antihyperglycemic Anthraquinone from Tectona grandis Leaves." Natural Product Communications 5, no. 3 (2010): 1934578X1000500. http://dx.doi.org/10.1177/1934578x1000500318.
Full textAbstract:
A new anthraquinone (3,8-dihydroxy-2-methyl anthraquinone), named tectone (1), along with fourteen known compounds (2-15) comprised of five terpenoids (2-5, 15), four flavonoids (6-9), three flavone glycosides (10-12), and two phenolic glycosides (13-14) were isolated from the chloroform and n-butanol fractions of the ethanol extract of Tectona grandis leaves. Attempts were made to synthesize compound 1. This resulted in the synthesis of three additional anthraquinones (16-18), out of which compound 16 is new. The structures of all compounds were established by spectral analysis. The isolated and synthesized compounds were evaluated for their antihyperglycemic activity. Compounds 1, 2, 4 and 14 showed significant antihyperglycemic activity in streptozotocin-induced diabetic rats at a dose of 100 mg/kg body weight, which is comparable to the standard drug metformin.
4
DOILOM, MINGKWAN, LUCAS A. SHUTTLEWORTH, JOLANDA ROUX, EKACHAI CHUKEATIROTE, and HYDE D. KEVIN. "Barriopsis tectonae sp. nov. a new species of Botryosphaeriaceae from Tectona grandis (teak) in Thailand." Phytotaxa 176, no. 1 (2014): 81. http://dx.doi.org/10.11646/phytotaxa.176.1.10.
Full textAbstract:
Tectona grandis (teak) is an increasingly important timber resource globally. It is native to Asia, including Thailand. In this paper a new species of Barriopsis, B. tectonae sp. nov., is described from a dead T. grandis branch collected in Thailand. Barriopsis tectonae can be differentiated from the two previously described species of Barriopsis; B. fusca and B. iraniana, by its ascospore and conidial dimensions. Phylogenetic evaluation of the ITS, TEF1-α and BT genomic regions provide further evidence that B. tectonae is a novel species.
5
Fauzi, Mohamad Anis, Tri Maria Hasna, Dedi Setiadi, and Hamdan Adma Adinugraha. "Variasi Morfologi Empat Spesies Jati ( Tectona Sp) di Asia Tenggara: Potensi Pemuliaan Pohon dan Bioteknologinya." Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati 5, no. 2 (2021): 115. http://dx.doi.org/10.24002/biota.v5i2.2946.
Full textAbstract:
Jati (Tectona grandis Linn.f) dikembangkan secara intensif di Indonesia terutama di Pulau Jawa dengan luas pengelolaan hutan tanaman ± 1 juta Ha. Di Asia Tenggara jenis ini ditanam pula oleh negara Philipina, Thailand, Malaysia, Laos, Vietnam bagian Selatan dan Myanmar dengan luas bervariasi. Namun demikian pengetahauan mengenai variasi morfologi dan pemanfaatan untuk kegiatan bioteknologi dan pemuliaan masih berkisar pada satu spesies saja yaitu Tectona grandis. Sedangkan spesies lain seperti Tectona abludens, Tectona hamiltoniana dan Tectona philiphinensis belum banyak diketahui.Penelitian dilakukan dengan mengambil sampel daun di 3 pengembangan jati di Pulau Jawa yaitu Cepu dan Randublatung Jawa Tengah, Nglambangan Bojonegoro Jawa Timur dan Ciamis Jawa Barat. Untuk Spesies Tectona abludens sampel daun diambil di daerah Dlingo, Bantul DIY dan Selang, Gunungkidul. Sedangkan untuk jenis Tectona philiphinensis lebih dalam dipelajari berdasarkan informasi yang diperoleh dari Kementrian Kehutanan Philipina dan untuk jenis Tectona hamiltoniana dilengkapi dengan data dan informasi dari Kementrian Kehutanan Myanmar. Sampel daun dari tiap jenis diambil 2 daun (daun muda dan daun tua) masing-masing 5 ulangan. Pengamatan terhadap bentuk duduk daun, jumlah tulang daun primer dan sekunder serta pola tulang daun didiskripsikan dan dibandingkan antara keempat spesies tersebut. Morfologi bunga, kulit batang, kayu, biji dan bentuk percabangan digunakan juga untuk melengkapi variasi morfologi masing-masing spesies. Variasi morfologi yang ada dipergunakan untuk mengetahui variasi empat spesies Tectona sp tersebut sehingga diketahui karakter-karakter tiap jenis yang berpeluang untuk dimanfaatkan dalam kegiatan pemuliaan pohon baik melalui pemuliaan konvensional atau bioteknologi.Tectona grandis memiliki morfologi yang lebih dekat dengan Tectona abludens, sedangkan Tectona hamiltoniana dan Tectona phillipinensis memiliki morfologi khas yang berbeda dengan lainnya. Beberapa karakter morfologi diantara keempat spesies tersebut berpeluang diamanfaatkan untuk kegiatan pemuliaan jati antara lain kelurusan batang, kemampuan adaptasi di lahan kering dan ketahanan terhadap penyakit.
6
M., Shri Vidhya, Bhuvaneswari K., and Syamala G. "Spectrophotometry – A Tool to Assess Corticosteroids and Tectona Grandis." International Journal of Toxicological and Pharmacological Research 14, no. 11 (2024): 74–80. https://doi.org/10.5281/zenodo.14562268.
Full textAbstract:
Background: Glucocorticoids- Prednisolone, Hydrocortisone are available in various formulations like oral and parenteral, inhalation and topical. Though they are many medicinal benefits of steroids nowadays, this study aims to compare the natural product Tectona grandis which possess steroid like activity with the Standard steroids like Hydrocortisone Aim of our study is to determine the potency of Tectona grandis decoction with Standard steroids (Prednisolone, Hydrocortisone) by analytical method and to compare steroid in Tectona grandis extract with Standard Steroid by FTIR and HPTLC. Methodology: 20 mg of Tectona grandis‘s bark were dried, weighted and made in to fine powder using blender, thus Tectona grandis powder was prepared. The processed Tectona grandis were fractionated /extracted using chloroform. The extract were subjected to phytochemical analysis focusing on phytosterols by two methods-Salkowski test and Lieberman burchardt test. Estimation of Steroid in Tectona grandise as done by Spectrophotometry and HPTLC. Results: The appearance of reddish brown precipitate by Salkowski test and reddish brown ring formation by Lieberman-burchardt test indicate the presence of phytosterol. TG decoction is equal to 1.25 mg of hydrocortisone and 1.75mg of prednisolone. Tectona grandis extract showed that the spectrum similar to spectrum of Prednisolone whose characteristic band of the OH group were found at 3200-3500 cm-1 and two carbonyl stretching peak appear as a very strong band at 1708cm-1 and 1654 cm-1, denotes Prednisolone like structure in FTIR. Conclusion: Tectona grandis‘s stem bark is a commercially available plant product that possess steroidal activity and the structure resembles prednisolone. It can be used to reduce inflammation whenever corticosteroid are indicated as alternative cost effective treatment.
7
DOILOM, MINGKWAN, LUCAS A. SHUTTLEWORTH, JOLANDA ROUX, EKACHAI CHUKEATIROTE, and KEVIN D. HYDE. "Botryosphaeriaceae associated with Tectona grandis (teak) in Northern Thailand." Phytotaxa 233, no. 1 (2015): 1. http://dx.doi.org/10.11646/phytotaxa.233.1.1.
Full textAbstract:
Tectona grandis (teak) is one of the most important economic timbers worldwide. Limited studies exist on the potential pathogens of these trees. Fungi in the Botryosphaeriaceae are cosmopolitan opportunistic pathogens, endophytes and saprobes of numerous hosts. Both symptomatic and asymptomatic branch and stem sections, as well as leaves were collected from T. grandis in plantations and forests in four provinces of northern Thailand with the aim of identifying species of Botryosphaeriaceae associated with these trees. Morphology and multi-locus phylogenies (ITS, TEF1-α, β-tubulin) were used to identify the Botryosphaeriaceae species. Six species from four different genera were found on T. grandis in Northern Thailand. These included Dothiorella tectonae sp. nov., Lasiodiplodia brasiliense, L. pseudotheobromae, L. theobromae, Pseudofusicoccum adansoniae and Sphaeropsis eucalypticola. Dothiorella tectonae is introduced here as a novel species and compared with other species in the genus. Dothiorella tectonae, L. brasiliense, L. pseudotheobromae, L. theobromae, P. adansoniae and S. eucalypticola are first reports for T. grandis in Thailand. Variations in morphology between descriptions of previously described species and that obtained in this study are described to facilitate future identification of species.
8
Okeniyi, Joshua Olusegun, Abimbola Patricia Idowu Popoola, Modupe Elizabeth Ojewumi, Elizabeth Toyin Okeniyi, and Jacob Olumuyiwa Ikotun. "Tectona grandis Capped Silver-Nanoparticle Material Effects on Microbial Strains Inducing Microbiologically Influenced Corrosion." International Journal of Chemical Engineering 2018 (2018): 1–6. http://dx.doi.org/10.1155/2018/7161537.
Full textAbstract:
This paper investigates Tectona grandis capped silver nanoparticle material effects on the microbial strains inducing microbiologically influenced corrosion (MIC) of metals. Leaf-extract from Tectona grandis natural plant was used as a precursor for the synthesis of silver-nanoparticle material, which was characterised by a scanning electron microscopy having Energy Dispersion Spectroscopy (SEM + EDS) facility. Sensitivity and resistance studies by the synthesized Tectona grandis capped silver nanoparticle material on three Gram-positive and three Gram-negative, thus totalling six, MIC inducing microbial strains were then studied and compared with what was obtained from a control antibiotic chemical. Results showed that all the microbial strains studied were sensitive to the Tectona grandis capped silver nanoparticle materials whereas two strains of microbes, a Gram-positive and a Gram-negative strain, were resistant to the commercial antibiotic chemical. These results suggest positive prospects on Tectona grandis capped silver nanoparticle usage in corrosion control/protection applications on metallic materials for the microbial corrosion environment.
9
Supriyati, Dyah, and Dwi Agustiyani. "EFEK PENGGUNAAN PUPUK ORGANIK DAN INOKULAN MIKROBATERHADAP PERTUMBUHAN JATI SUPER (Tectona grandis L.f.) PADA LAHAN BEKAS TAILING POND PENAMBANGAN EMAS DI CIKOTOK." Jurnal Teknologi Lingkungan 11, no. 3 (2016): 363. http://dx.doi.org/10.29122/jtl.v11i3.1181.
Full textAbstract:
Experiment using organic fertilizer and microbial community to support the growth of Tectona grandis L.f in the cyanide contaminated-soil has been conducted in gold tailing pond Cikotok. Microbes used in this experiment were mixed of cyanide degradingbacteria,Nitrogen fixing-bacteria, and Phosphat solubilizing-bacteria. The results show that the microbes given in the Tectona grandis L.f plantation was significantly supporting the growth of the plants and reduced cyanide from the contaminated soil, but did not influence the microbe population of the soil.Key word: Phytoremediation, Cyanide, Tectona grandis L.f.
10
Shava Ansari, Shweta Gupta, Sabiha Iram, and Dr. Shiv Dev Singh. "A Comprehensive Review on Pharmacological Properties of Tectona Grandis. Linn." International Journal of Scientific Research in Science and Technology 12, no. 2 (2025): 743–50. https://doi.org/10.32628/ijsrst251222617.
Full textAbstract:
Tectona grandis is a huge deciduous tree that is found throughout Myanmar Southeast Asia, and the Indian subcontinent and is a member of the Lamiaceae family. Traditionally, various parts of the plant, including its root, seed, flowers, leaves, and bark, have been used in folk medicine for treating ailments such as ulcers, diabetes, inflammation, skin disorders, and microbial infections. The phytochemical composition of Tectona grandis is highly diverse, encompassing naphthoquinones, anthraquinones, flavonoids, terpenoids, alkaloids, phenolic acids, and saponins, which are responsible for its extensive pharmacological properties. This review compiles and critically analyzes the therapeutic potential of Tectona grandis, focusing on its anti-ulcerogenic, cytotoxic, antihyperglycemic, antifungal, antioxidant, antimicrobial, antiasthmatic, anticonvulsant, analgesic, and diuretic activities. Additionally, its role in hair growth stimulation and nutritional benefits is discussed. Furthermore, recent advancements in the synthesis of metal nanoparticles from Tectona grandis extracts have demonstrated promising applications in antimicrobial and cytotoxic therapies.
Dissertations / Theses on the topic "Tectona"
1
Mekkamol, Sureewan. "Endophytic fungi of Tectona grandis L. (Teak)." Thesis, Liverpool John Moores University, 1998. http://researchonline.ljmu.ac.uk/5030/.
Full textAbstract:
Taxonomic diversity, biology and ecological aspects of fungal endophytes of Tectona grandis (teak) from Chiang Mai Province, Thailand were investigated. It was found that the endophyte assemblages of mature leaves sampled from natural forest and plantation teak were not significantly different. Members of the Xylariaceae, especially Daldinia eschscholzii, Nemania subannulata, Hypoxylon haematostroma and Xylaria cubensis were frequent isolates. Widely reported endophytic fungi such as Phomopsis, Colletotrichum, Cladosporium and Fusarium were also isolated. There is little evidence to support host specificity for the majority of the isolates. Differences in endophyte assemblages between young and mature leaves were shown to occur with a much lower infection percentage in the young leaves. Species of Phomopsis and Colletotrichum were dominant in the young leaves but members of the Xylariaceae dominated in mature leaves. This pattern was the same for both natural forest and plantation samples. However comparison of taxa isolated from leaf lamina, midrib and veins gave conflicting results. Samples from mature leaves from natural forest trees exhibited little variation with greater variation in taxa recovered being found to occur between sampling years than between position of isolation from the leaf. In plantation leaves, although the results were similar to those from natural forest tree leaves for two of the years sampled, in 1997 the overall recovery rate was highest for the lamina, followed by veins and then the midrib. There was no evidence obtained to link individual taxa with specific regions of the leaf. It is now possible to devise a sampling strategy to obtain suitable diversity of endophytic isolates from teak leaves for industrial screening of these fungi. Techniques were developed to overcome current problems of identification of xylariaceous endophytes in the absence of their teleomorph. Inoculation of suitable woody substrata combined with selective incubation was used to induce teleomorph formation in many of the isolates and this together with chemical profiling enabled identification to species of many of these isolates. Rates of development of specific species were obtained and differences in environmental conditions necessary for development of teleomorphs to maturity were noted for members of different genera. Thus species of Daldinia and Hypoxylon required drier conditions than species of Xylaria and Nemania which only developed under wet shaded conditions. Xylariaceae from the natural forest, plantation, and forest surrounding the plantation were surveyed and a number of the Xylariaceae recovered as endophytes were found to be new to science, new records for Thailand or were recorded as endophytes for the first time.
2
Delmadi, Leila Cristiane 1974. "Tectona grandis L.f. : patologia de frutos, patogenicidade e epidemiologia /." Botucatu, 2017. http://hdl.handle.net/11449/152751.
Full textAbstract:
Orientador: Edson Luiz Furtado<br>Banca: Leo Zimback<br>Banca: Waldir Cintra de Jesus Junior<br>Banca: Willian Bucker Moraes<br>Banca: Anibal Alves de Carvalho Junior<br>Resumo: A espécie florestal Tectona grandis (Teca) é nativa do sudeste asiático, possui grande porte, rápido crescimento, produtora de madeira nobre e valorizada por sua beleza, resistência e durabilidade. No Brasil, surgiu como uma alternativa substituta a outras espécies, como o mogno (Swietenia macrophylla) e a cerejeira (Torresea acreana). A presente pesquisa teve como objetivo investigar a condição fitossanitária da teca em frutos e, testar a resistência de três diferentes clones à doenças fúngicas. Os objetivos específicos foram: i) avaliar frutos de teca de 3 procedências (Alta Floresta/MT, Cáceres/MT e Botucatu/SP) quanto a presença de patógenos; ii) testar a resistência de 3 clones (S0, S1 e S3) de T. grandis aos patógenos: Olivea tectonae, Fusarium oxysporum e Ceratocystis fimbriata em condições controladas; iii) elaborar uma escala diagramática com folhas adultas de T. grandis, para avaliação da ferrugem causada pelo fungo O. tectonae; iv) testar a resistência de 3 clones de teca (S0, S1 e S3) à doenças fúngicas em plantio de campo. Os experimentos foram conduzidos no Laboratório de Patologia Florestal - FCA/UNESP-Botucatu e também na Fazenda Experimental da UNESP em São Manoel/SP. Como resultados para o teste com frutos, obteve-se: Procedência Alta Floresta/MT, 13,33% de Aspergillus sp.; 3,33% de Colletotrichum sp. e Alternaria sp.; 1,66% de Septoria sp. e Penicillium sp.. Para os frutos procedentes de Cáceres/MT, 61,66% para o patógeno Fusarium sp., 8,33% com Penicillium... (Resumo completo, clicar acesso eletrônico abaixo)<br>Abstract: The forest species Tectona grandis (Teak) is native to Southeast Asia, has large, rapidly growing producer of noble wood and valued for its beauty, strength and durability. In Brazil, it emerged as a replacement alternative to other species, such as mahogany (Swietenia macrophylla) and Cherry tree (Torresea acreana).The present research had as objective to investigate the phytosanitary condition of teak fruits and to test the resistance of three different clones to fungal diseases. The specific objectives were: i) to evaluate teak fruits from 3 provenances (Alta Floresta/MT, Cáceres/MT and Botucatu/SP) in the presence of pathogens; ii) to test the resistance of 3 clones (S0, S1 and S3) of T. grandis to pathogens: Olivea tectonae, Fusarium oxysporum and Ceratocystis fimbriata under controlled conditions; iii) to elaborate a diagrammatic scale with adult leaves of T. grandis, to evaluate the rust caused by the fungus O. tectonae; iv) to test the resistance of 3 teak clones (S0, S1 and S3) to fungal diseases in field planting. The experiments were conducted at the Laboratory of Forest Pathology - FCA/UNESP/Botucatu and also at the experimental farm of UNESP in São Manoel/SP. As results for the fruit test, we obtained: Provenance Alta Floresta/MT, 13.33% of Aspergillus sp.; 3.33% of Colletotrichum sp. and Alternaria sp.; 1.66% of Septoria sp. and Penicillium sp.. For fruits from Cáceres/MT, 61.66% for the pathogen Fusarium sp., 8.33% with Penicillium sp., 1.66% with Arthrosporium sp. and Cunninghamella sp. As for Botucatu/SP, 21.66% with Aspergillus sp., 23.33% with Alternaria sp., 8.33% with Fusarium sp., 10% with Penicillium sp., 5% for Nigrospora sp. and 3.33% with Ovularia and Humicola. The control under controlled conditions with fungus Olivea tectonae was carried out by spraying a suspension of spores in a concentration of 2,42 x 105 uredynopores/ml-1. It was observed that the latent period was ...<br>Doutor
3
Delmadi, Leila Cristiane. "Tectona grandis L.f.: patologia de frutos, patogenicidade e epidemiologia." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/152751.
Full textAbstract:
Submitted by LEILA CRISTIANE DELMADI (leila.delmadi@unemat.br) on 2018-02-16T19:25:10Z
No. of bitstreams: 1
TESE FINAL_Leila Cristiane Delmadi 08_02_18.pdf: 4391349 bytes, checksum: e4b70ce78d01a2f04c5de286b9ee9c47 (MD5)<br>Approved for entry into archive by Maria Lucia Martins Frederico null (mlucia@fca.unesp.br) on 2018-02-19T11:36:38Z (GMT) No. of bitstreams: 1
delmadi_lc_dr_botfca.pdf: 4391349 bytes, checksum: e4b70ce78d01a2f04c5de286b9ee9c47 (MD5)<br>Made available in DSpace on 2018-02-19T11:36:38Z (GMT). No. of bitstreams: 1
delmadi_lc_dr_botfca.pdf: 4391349 bytes, checksum: e4b70ce78d01a2f04c5de286b9ee9c47 (MD5)
Previous issue date: 2017-06-02<br>A espécie florestal Tectona grandis (Teca) é nativa do sudeste asiático, possui grande porte, rápido crescimento, produtora de madeira nobre e valorizada por sua beleza, resistência e durabilidade. No Brasil, surgiu como uma alternativa substituta a outras espécies, como o mogno (Swietenia macrophylla) e a cerejeira (Torresea acreana). A presente pesquisa teve como objetivo investigar a condição fitossanitária da teca em frutos e, testar a resistência de três diferentes clones à doenças fúngicas. Os objetivos específicos foram: i) avaliar frutos de teca de 3 procedências (Alta Floresta/MT, Cáceres/MT e Botucatu/SP) quanto a presença de patógenos; ii) testar a resistência de 3 clones (S0, S1 e S3) de T. grandis aos patógenos: Olivea tectonae, Fusarium oxysporum e Ceratocystis fimbriata em condições controladas; iii) elaborar uma escala diagramática com folhas adultas de T. grandis, para avaliação da ferrugem causada pelo fungo O. tectonae; iv) testar a resistência de 3 clones de teca (S0, S1 e S3) à doenças fúngicas em plantio de campo. Os experimentos foram conduzidos no Laboratório de Patologia Florestal - FCA/UNESP-Botucatu e também na Fazenda Experimental da UNESP em São Manoel/SP. Como resultados para o teste com frutos, obteve-se: Procedência Alta Floresta/MT, 13,33% de Aspergillus sp.; 3,33% de Colletotrichum sp. e Alternaria sp.; 1,66% de Septoria sp. e Penicillium sp.. Para os frutos procedentes de Cáceres/MT, 61,66% para o patógeno Fusarium sp., 8,33% com Penicillium sp., 1,66% com Arthrosporium sp. e Cunninghamella sp. Quanto a procedência Botucatu/SP, 21,66% com Aspergillus sp., 23,33% com Alternaria sp., 8,33% com Fusarium sp., 10% com Penicillium sp., 5% para Nigrospora sp. e 3,33% com Ovularia e Humicola. O experimento em condições controladas, com o fungo Olivea tectonae foi realizado com a pulverização de uma suspensão de esporos em concentração de 2,42 x 105 urediniósporos/mL-1. Observou-se que o período latente foi de 5 dias e, na análise de severidade o clone S0 apresentou um número de 59,4 pústulas/3cm², S1 com 86,6 e S3 com 88,1 pústulas/3cm². A inoculação dos fungos Fusarium oxysporum e Ceratocystis fimbriata foi feita com a introdução de um disco de cultura micelial em uma abertura feita no caule da planta a 10 cm do colo. Com a inoculação do F. oxysporum os resultados médios das lesões encontradas no caule, foram: S0 com 8,25 cm, S1 com 8,77 cm e S3 com 11,25 cm de lesão. Já com a inoculação do C. fimbriata as médias das lesões se deram, conforme segue: S0 com 13,2 cm, S1 com 15,3 cm e S3 com 14,8 cm de lesão. Não houve diferença significativa entre as médias nos clones testados. Para a elaboração da escala diagramática, foram determinados 7 níveis de severidade em função da distribuição da amostra para as folhas adultas (N0 = 0%; N1 = 2,5%; N2 = 5%; N3 = 10%; N4 = 20%; N5 = 40% e N6 = 80%). Com a adoção da escala proposta, a totalidade dos avaliadores apresentou melhor precisão, com R² = 0,93 em comparação ao resultado obtido sem o uso da escala (R² = 0,88). O plantio em campo se deu com a introdução de 4.274 mudas de teca, divididas em 3 clones distintos (S0, S1 e S3). Foram identificadas as doenças fúngicas com ocorrência natural, ferrugem e cancro, causadas respectivamente, pelos fungos: O. tectonae e Neofusiccocum parvum. Não houve diferença estatística entre os clones para nenhum dos patógenos avaliados. Conclui-se com isso, que nas condições em que foi instalado o experimento, os clones testados não apresentaram resistência horizontal as doenças acima descritas.<br>The forest species Tectona grandis (Teak) is native to Southeast Asia, has large, rapidly growing producer of noble wood and valued for its beauty, strength and durability. In Brazil, it emerged as a replacement alternative to other species, such as mahogany (Swietenia macrophylla) and Cherry tree (Torresea acreana).The present research had as objective to investigate the phytosanitary condition of teak fruits and to test the resistance of three different clones to fungal diseases. The specific objectives were: i) to evaluate teak fruits from 3 provenances (Alta Floresta/MT, Cáceres/MT and Botucatu/SP) in the presence of pathogens; ii) to test the resistance of 3 clones (S0, S1 and S3) of T. grandis to pathogens: Olivea tectonae, Fusarium oxysporum and Ceratocystis fimbriata under controlled conditions; iii) to elaborate a diagrammatic scale with adult leaves of T. grandis, to evaluate the rust caused by the fungus O. tectonae; iv) to test the resistance of 3 teak clones (S0, S1 and S3) to fungal diseases in field planting. The experiments were conducted at the Laboratory of Forest Pathology - FCA/UNESP/Botucatu and also at the experimental farm of UNESP in São Manoel/SP. As results for the fruit test, we obtained: Provenance Alta Floresta/MT, 13.33% of Aspergillus sp.; 3.33% of Colletotrichum sp. and Alternaria sp.; 1.66% of Septoria sp. and Penicillium sp.. For fruits from Cáceres/MT, 61.66% for the pathogen Fusarium sp., 8.33% with Penicillium sp., 1.66% with Arthrosporium sp. and Cunninghamella sp. As for Botucatu/SP, 21.66% with Aspergillus sp., 23.33% with Alternaria sp., 8.33% with Fusarium sp., 10% with Penicillium sp., 5% for Nigrospora sp. and 3.33% with Ovularia and Humicola. The control under controlled conditions with fungus Olivea tectonae was carried out by spraying a suspension of spores in a concentration of 2,42 x 105 uredynopores/ml-1. It was observed that the latent period was 5 days and in the severity analysis clone S0 presented a number of 59,4 pustules/3cm², S1 with 86,6 and S3 with 88.1 pustules/3cm². The inoculation of fungi Fusarium oxysporum and Ceratocystis fimbriata was made with the introduction of a mycelial culture disc into an opening made in the plant stem at 10 cm from the colon. With the inoculation of F. oxysporum the average results of the lesions found in the stem were: S0 with 8,25 cm, S1 with 8,77 cm and S3 with 11,25 cm of lesion. With the inoculation of C. fimbriata, the mean of the lesions were as follows: S0 with 13,2 cm, S1 with 15,3 cm and S3 with 14,8 cm of lesion. There was no statistical difference between the clones tested. For the elaboration of the diagrammatic scale, 7 levels of severity were determined as a function of the sample distribution for the adult leaves (N0 = 0%, N1 = 2,5%, N2 = 5%, N3 = 10%, N4 = 20%, N5 = 40% and N6 = 80%). With the adoption of the proposed scale, all the evaluators presented better accuracy, with R² = 0,93 compared to the result obtained without the use of the scale (R² = 0,88). Field planting occurred with the introduction of 4.274 teak seedlings, divided into 3 distinct clones (S0, S1 and S3). Fungal diseases with natural occurrence, rust and cancer, caused respectively by fungi: O. tectonae and Neofusiccocum parvum. There was no statistical difference between the clones for any of the evaluated pathogens. It was concluded that, under the conditions in which the experiment was installed, the clones tested did not show horizontal resistance to the diseases described above.
4
Kraenzel, Margaret. "Carbon storage of Panamanian harvest-age teak (Tectona grandis) plantations." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31249.
Full textAbstract:
Reforestation is being considered as a mitigation option to help combat the climate change predicted to result from atmospheric carbon dioxide pollution. Forestry-based carbon storage projects are being introduced in many tropical countries, and assessment of species-specific carbon storage potentials is made difficult by a lack of species-level information. This study focuses on teak (Tectona grandis), to measure many of the characteristics affecting the carbon storage potential both of the trees themselves and of the plantations they are in. Root-to-shoot ratio, above- and belowground biomass, as well as tissue carbon content were measured in 20-year-old teak trees in Panamanian plantations. A regression relating diameter at breast height (DBH) to total tree carbon storage for trees of various sizes was developed. To scale up to the plantation level, this regression was used to estimate the carbon storage of the trees of four plantations. Litter, undergrowth, and soil were studied to estimate carbon storage in these compartments. These estimates were collated to form a global estimate of carbon storage in Panamanian harvest age teak plantations. Various methods of calculation of carbon storage in short-rotation plantations are discussed. This work will allow greater precision in the assessment of carbon storage in individual plantations.
5
Gómez, Esteban Galeano. "Characterization of genes involved in lignin biosynthesis in Tectona grandis." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/11/11151/tde-30042015-153939/.
Full textAbstract:
Teak tree (Tectona grandis L.f.) has a high value in the timber trade for fabrication of woody products due to its extraordinary qualities of color, density and durability. Despite the importance of this species, genetic and molecular studies available are limited. Also, the lack of molecular information about secondary xylem and tree maturation has hindered genetic exploration of teak. Therefore, gene expression studies and transcriptomic profiling are essential to explore wood formation and lignin biosynthesis through the development and aging of vascular plants. Aiming the gene expression studies, it was essential to identify and clone reference genes for teak. Eight genes were tested, commonly used in qRT-PCR, including TgRP60S, TgCAC, TgACT, TgHIS3, TgSAND, TgTUB, TgUBQ and TgEF1a. Expression profiles of these genes were evaluated by qRT-PCR in six tissue and organ samples (leaf, flower, seedling, root, stem and branch secondary xylem). Stability validation by NormFinder, BestKeeper, geNorm and Delta Ct programs showed that TgUBQ and TgEF1a are the most stable genes to use as qRT-PCR reference genes in teak in the conditions tested. Due to the availability of 12- and 60-year-old teak trees, RNA-seq was performed in diferent organs (seedlings, leaves, flowers, root, stem and branch secondary xylem). A total of 462,260 transcripts were obtained by assembling with \"Trinity\" software. Also, 1,502 and 931 genes differentially expressed were identified for stem and branch secondary xylem, respectively, using DESeq program, and MYB transcription factors, which were characterized. TgMYB1 amino acid sequence displayed a predicted coiled-coil (CC) motif while TgMYB2, TgMYB3 and TgMYB4 showed R2R3-MYB domain. All of them were phylogenetically grouped with several gymnosperms and flowering plants. High expression of TgMYB1 and TgMYB4 in lignified tissues of 60-year-old trees was observed. In this work, the Cinnamyl Alcohol Dehydrogenase (CAD) gene family was also studied. One complete (TgCAD1) and three partial (TgCAD2 to TgCAD4) members were characterized. The four enzymes presented residues for catalytic and structural zinc action, NADPH binding and substrate specificity, consistent with the mechanism of alcohol dehydrogenases. TgCAD3 and TgCAD4 were highly expressed in young and mature sapwood and seem to be duplicated and highly related with lignin biosynthesis. Tree genetic improvement, marker-assisted selection and plant transformation seem to be promising lines of research for the data obtained from this research. This is the first study addressing gene characterization and expression, phylogeny and transcriptomic profiling in teak.<br>A árvore de teca (Tectona grandis L.f.) tem alto valor no comércio de madeira para a fabricação de produtos lenhosos, devido às suas qualidades extraordinárias de cor, densidade e durabilidade. Apesar da importância desta espécie, são poucos os estudos genéticos e moleculares disponíveis. Também, a falta de informação molecular sobre xilema secundário e maturação da árvore tem dificultado a exploração genética de teca. Assim, estudos de expressão gênica e perfis transcricionais são relevantes para explorar a formação da madeira e a biossíntese de lignina durante o desenvolvimento e envelhecimento das plantas vasculares. Visando os estudos de expressão gênica, foi essencial identificar e clonar genes de referencia para a teca. Foram testados oito genes comumente usados em qRT-PCR, TgRP60S, TgCAC, TgACT, TgHIS3, TgSAND, TgTUB, TgUBQ e TgEF1a. Perfis de expressão destes genes foram avaliados por qRT-PCR em seis amostras de tecidos e órgãos (folhas, flores, plântulas, raiz, xilema secundário de caule e ramo). A validação da estabilidade pelos programas NormFinder, BestKeeper, geNorm e Delta CT mostrou que TgUBQ e TgEF1a são os genes mais estáveis para usar como genes de referência em teca nas condições testadas. Em virtude da disponibilidade de árvores de teca de diferentes idades, entre 12 e 60 anos, foi realizado o RNAseq de diferentes órgãos (plântulas, folhas, flores, raiz, ramos e caules de árvores de 12 e 60 anos). Obteve-se um total de 462.260 transcritos pela montagem com o software \"Trinity\". Foram identificados 1.502 e 931 genes diferencialmente expressos para xilema secundário de caule e ramo, respectivamente, utilizando o programa DESeq e fatores de transcrição MYB, que foram posteriormente caracterizados. A sequência de aminoácidos do TgMYB1 exibiu um motivo \"coiled-coil\" (CC), enquanto TgMYB2, TgMYB3 e TgMYB4 mostraram domínio R2R3-MYB. Todos eles foram filogeneticamente agrupados com várias gimnospermas e angiospermas. Observou-se alta expressão do TgMYB1 e TgMYB4 em tecidos lignificados de árvores de 60 anos de idade. Neste trabalho também foi estudada a família gênica Cinamil álcool desidrogenase (CAD). Foi caracterizado um membro completo (TgCAD1) e três parciais (TgCAD2 a TgCAD4). As quatro enzimas apresentaram resíduos de ação catalítica e estrutural de zinco, de ligação ao NADPH e de especificidade de substrato, em conformidade com o mecanismo conservado de álcool desidrogenases. TgCAD3 e TgCAD4 foram altamente expressos no alburno jovem e maduro e parecem estar duplicados e relacionados com a biossíntese de lignina. O melhoramento genético de árvores, a seleção assistida utilizando marcadores moleculares e a transformação de plantas parecem ser linhas promissoras de pesquisa, a partir dos dados obtidos nesta pesquisa. Este é o primeiro estudo sobre caracterização e expressão gênica, filogenia e perfis transcricionais em teca.
6
GUIMARAES, M. A. P. "Cultivo de Tectona grandis L.f. no Estado do Espírito Santo." Universidade Federal do Espírito Santo, 2012. http://repositorio.ufes.br/handle/10/4995.
Full textAbstract:
Made available in DSpace on 2016-08-29T15:37:01Z (GMT). No. of bitstreams: 1
tese_5917_Dissertação Marianna.pdf: 1266625 bytes, checksum: dfec6cf194a824375437f41252b85a6e (MD5)
Previous issue date: 2012-10-03<br>GUIMARÃES, Marianna Abdalla Prata. Cultivo de Tectona grandis L.f. no Estado do Espírito Santo. 2012. Dissertação (Mestrado em Ciências Florestais). Universidade Federal do Espírito Santo, Alegre-ES. Orientador: Prof. Dr. José Franklim Chichorro. Coorientador: Prof. Dr. Reginaldo Brito da Costa.
O objetivo do trabalho foi gerar um mapa de zoneamento edafoclimático para teca no Estado do Espírito Santo, caracterizar seis povoamentos de teca no sul do Espírito Santo, e avaliar a variabilidade genética em progênies de Tectona grandis L.f. no município de Alegre, Estado do Espírito Santo. O trabalho foi dividido em três capítulos. No primeiro, utilizou-se a lógica Fuzzy, no ambiente de trabalho ArcGis 9.2/ArcMap®, a partir de informações de série história de precipitação acumulada anual, temperatura média do ar, déficit hídrico acumulado anual e textura dos solos. A partir da ferramenta IDW e Reclass geraram-se os mapas de cada fator, considerando os índices para teca. Através da sobreposição desses mapas, obteve-se o mapa de zoneamento edafoclimático. A região sul e o litoral centro-sul apresentaram aptidão ao cultivo da espécie. A região oeste foi classificada como apta com restrição, porém apresentou afloramentos rochosos, que foram mascarados pela metodologia. As regiões norte e serrana foram classificadas como apta com restrição, devido a fatores hídricos. No segundo capítulo, avaliou-se 6 povoamentos de teca nos municípios de Cachoeiro de Itapemirim, Muqui e Mimoso do Sul. Realizou-se a divisão dos povoamentos em parcelas de 9,0 m x 12,0 m, onde se avaliou 6 parcelas em cada povoamento, sorteadas ao acaso, anotando-se as variáveis: altura total, altura comercial, circunferência, ataque de pragas e doenças e presença de tortuosidades e galhos grossos no fuste. Os povoamentos da região são pequenos, e apresentaram médias baixas para as características avaliadas, mesmo estando localizadas em áreas aptas ao cultivo da espécie. Para o terceiro capítulo, utilizou-se como tratamento 50 progênies de meio-irmãos de teca, estabelecidas sob delineamento em blocos casualizados, no espaçamento 3,0 m x 2,0 m. O monitoramento foi realizado aos 6 e 12 meses após o plantio, onde avaliaram-se: i) diâmetro da base do caule; ii) altura total das plantas; e iii) sobrevivência. As variáveis foram analisadas usando-se a metodologia de modelo linear misto uni e multivariado, com os programas SELEGEN-REML/BLUP e Genes. Verificou-se baixa variabilidade genética e correlação para todos os caracteres aos 6 e 12 meses, que pode ser atribuída à restrita base genética, à localização do experimento ou à idade das plantas. As progênies 15, 20, 21 e 41 foram superiores no Rank-Médio para todos os caracteres avaliados.
Palavras chave: teca, planejamento florestal, inventário florestal, melhoramento florestal.
7
Guimarães, Mariana Abdalla Prata. "Cultivo de Tectona grandis L.f. no Estado do Espírito Santo." Universidade Federal do Espírito Santo, 2012. http://repositorio.ufes.br/handle/10/5821.
Full textAbstract:
Made available in DSpace on 2016-12-23T13:51:55Z (GMT). No. of bitstreams: 1
Marianna Abdala Prata Guimaraes.pdf: 1260415 bytes, checksum: 07877be4cfd376c908247866809ece44 (MD5)
Previous issue date: 2012-10-03<br>The objective was to create a map of zoning edaphoclimatic for teak in Espírito Santo, characterize six teak stands in southern Espírito Santo, and evaluate the genetic variability in progenies of Tectona grandis Lf in the municipality of Alegre, state of Espírito Santo. The work was divided into three chapters. At first, we used the fuzzy logic, in the desktop ArcGIS 9.2/ArcMap®, from time series of accumulated rainfall annual average, air temperature, water deficit accumulated annual and texture of soils. From the IDW and Reclass tool were generated maps of each factor, considering the indexes for teak. By overlaying these maps, we obtained the map of zoning edaphoclimatic. The southern and south central coastal showed aptitude for the cultivation of the species. The western region was classified as suitable restriction, because of the had rocky outcrops, but were masked by the methodology. The mountainous and north regions were classified as able-restricted, due to water factors. In the second chapter, we evaluated six teak stands in the municipalities of Cachoeiro de Itapemirim, Muqui and Mimoso do Sul. The stands were divided in plots of 9,0 m x 12,0 m, and evaluated 6 plots in each stand, randomly selected, noting the variables: total height, merchantable height, circumference, attack of pests and diseases and the presence of thick branches and twisting on the shaft. The stands of the region are small, and showed low values to characteristics evaluated, despite being located in areas suitable for the cultivation of the species. In the third chapter, it was used as treatment 50 progenies of half-brothers teak, established in a randomized block design, spaced 3,0 m x 2,0 m. The monitoring was conducted at 6 and 12 months after planting, where it was evaluated: i) the diameter of the stem base, ii) total height and iii) survival. The variables were analyzed using the methodology of mixed linear model univariate and multivariate, through of the SELEGEN-REML/BLUP and Genes programs. There was low correlation and low genetic variability for all characters at 6 and 12 months, which can be attributed to genetic basis restricted, to the soil used in the experiment or the age of the plants. The progenies 15, 20, 21 and 41 were higher in Medium-Rank for all traits<br>O objetivo do trabalho foi gerar um mapa de zoneamento edafoclimático para teca no Estado do Espírito Santo, caracterizar seis povoamentos de teca no sul do Espírito Santo, e avaliar a variabilidade genética em progênies de Tectona grandis L.f. no município de Alegre, Estado do Espírito Santo. O trabalho foi dividido em três capítulos. No primeiro, utilizou-se a lógica Fuzzy, no ambiente de trabalho ArcGis 9.2/ArcMap®, a partir de informações de série história de precipitação acumulada anual, temperatura média do ar, déficit hídrico acumulado anual e textura dos solos. A partir da ferramenta IDW e Reclass geraram-se os mapas de cada fator, considerando os índices para teca. Através da sobreposição desses mapas, obteve-se o mapa de zoneamento edafoclimático. A região sul e o litoral centro-sul apresentaram aptidão ao cultivo da espécie. A região oeste foi classificada como apta com restrição, porém apresentou afloramentos rochosos, que foram mascarados pela metodologia. As regiões norte e serrana foram classificadas como apta com restrição, devido a fatores hídricos. No segundo capítulo, avaliou-se 6 povoamentos de teca nos municípios de Cachoeiro de Itapemirim, Muqui e Mimoso do Sul. Realizou-se a divisão dos povoamentos em parcelas de 9,0 m x 12,0 m, onde se avaliou 6 parcelas em cada povoamento, sorteadas ao acaso, anotando-se as variáveis: altura total, altura comercial, circunferência, ataque de pragas e doenças e presença de tortuosidades e galhos grossos no fuste. Os povoamentos da região são pequenos, e apresentaram médias baixas para as características avaliadas, mesmo estando localizadas em áreas aptas ao cultivo da espécie. Para o terceiro capítulo, utilizou-se como tratamento 50 progênies de meio-irmãos de teca, estabelecidas sob delineamento em blocos casualizados, no espaçamento 3,0 m x 2,0 m. O monitoramento foi realizado aos 6 e 12 meses após o plantio, onde avaliaram-se: i) diâmetro da base do caule; ii) altura total das plantas; e iii) sobrevivência. As variáveis foram analisadas usando-se a metodologia de modelo linear misto uni e multivariado, com os programas SELEGEN-REML/BLUP e Genes. Verificou-se baixa variabilidade genética e correlação para todos os caracteres aos 6 e 12 meses, que pode ser atribuída à restrita base genética, à localização do experimento ou à idade das plantas. As progênies 15, 20, 21 e 41 foram superiores no Rank-Médio para todos os caracteres avaliados
8
Barbosa, Renato da Silva. "Avaliação da calogênese em explantes juvenis de teca (Tectona grandis L. f) visando a indução da embriogênese somática." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-08042015-150029/.
Full textAbstract:
A teca (Tectona grandis L. f) é uma espécie lenhosa originária da Ásia que possui grande interesse econômico devidos as características nobres de sua madeira. Muito usada para construção de embarcações e móveis de luxo para exposição em ambientes abertos, seu consumo tem aumentado a cada ano, principalmente nos países produtores. Com a pressão das políticas ambientais sobre o uso da madeira de espécies nativas, a teca se mostra uma ótima alternativa para o mercado de madeira serrada. Contudo, a produção comercial desta espécie encontra algumas barreiras, sendo a principal delas, a propagação de matrizes adultas cujas características se adequam ao manejo silvicultural. Para possibilitar a reprodução fiel das árvores selecionadas e, para se realizar o rejuvenescimento do material adulto procedente dessas matrizes, faz-se uso de algumas técnicas, sendo uma delas, o uso da cultura de tecidos. Uma maneira bastante considerada no processo de rejuvenescimento e obtenção de mudas de espécies agrícolas e florestais é a formulação de protocolos de embriogênese somática. A embriogênese somática pode ser descrita como o processo pelo qual células somáticas desenvolvem estruturas semelhantes a embriões zigóticos, por meio de uma sequência ordenada de estágios embriogênicos característicos, sem ocorrência de fusão de gametas. Para tanto, o desenvolvimento de um protocolo eficiente de tal técnica exige muitos estudos preliminares. Com isso, o presente trabalho teve como objetivo estudar a calogênese em diferentes explantes de teca, através de uma sequência de indução utilizando difrentes fitorreguladores visando a obtenção de embriões somáticos. Para avaliar a resposta dos calos a cada etapa da indução foram realizadas análises histológica e histoquímica dos tecidos. Como respostas foram encontrados os balanços auxina/citocinina mais adequado para produção de calos, sendo eles 1,5/1,0 e, 1,5/4,0mgL-1 de picloram e BAP respectivamente. Verificou-se que o pulse com TDZ foi responsivo na obtenção de massas próembriogênicas, e que o uso da zeatina e da glutamina, não favorecem a maturação de tais estruturas, além de ocasionarem a morte celular programada das células da massa calosa. Contudo, os resultados mostram-se positivos e auxiliam na formulação de novos tratamentos e técnicas de indução da embriogênese somática para a espécie estudada.<br>Teak (Tectona grandis L. f) is a native woody species from Asia that has great economic interest due the noble characteristics of its wood. Widely used for building ships and luxury furniture for display outdoors, their consumption has increased every year, especially in producing countries. With the pressure of environmental policies on the use of native species of wood, teak shown a great alternative to the market for lumber. However, commercial production of this species has some barriers, the main one, being the propagation of mature breeders whose characteristics are suited to forestry management. In order to enable the faithful reproduction of the selected trees, and to perform the rejuvenation of these matrices derived of adult material, some techniques can be used, one of them is the use of tissue culture. Considered in a way quite rejuvenating and seedlings of agricultural and forest species process is the formulation of somatic embryogenesis protocols. Somatic embryogenesis can be described as the process by which somatic cells develop structures similar to zygotic embryos, through an ordered sequence of characteristic embryogenic stages without occurrence of the fusion of gametes. Thus, the development of an efficient protocol for this technique requires a lot of preliminary studies. Thus, the present work aimed to study the callus induction in different explants of teak, through a sequence induction using different growth regulators in order to obtain somatic embryos. To assess the response of each stage during callus induction, histological and histochemical tissue analysis were performed. Responses as the most suitable for callus production auxin / cytokinin balance sheets were found, they 1.5 / 1.0 and 1.5 / 4,0mgL-1 picloram/BAP, respectively. It was found that TDZ pulse was responsive to obtain pro-embryogenic masses, and that the use of zeatin and glutamine, are not conducive to maturation of such structures, and enacting the programmed cell death of the cell calli mass. However, the results show up positive and assist in the formulation of new treatments and techniques for induction of somatic embryogenesis of this species.
9
Pelissari, Allan Libanio. "Geoestatística aplicada ao manejo de povoamentos de Tectona grandis L. f." reponame:Repositório Institucional da UFPR, 2015. http://hdl.handle.net/1884/37953.
Full textAbstract:
Orientador : Prof. Dr. Afonso Figueiredo Filho<br>Co-orientador : Prof. Dr. Sidney Fernando Caldeira<br>Co-orientador : Prof. Dr. Sebastião do Amaral Machado<br>Tese (doutorado) - Universidade Federal do Paraná, Setor de Ciências Agrárias, Programa de Pós-Graduação em Engenharia Florestal. Defesa: Curitiba, 27/01/2015<br>Inclui referências<br>Área de concentração : Manejo florestal<br>Resumo: Com destacada importância no setor florestal mundial e perspectiva de retorno dos investimentos em curto e médio prazo, os plantios de teca no Brasil carecem de informações que visem orientar o manejo da cultura às condicionantes locais. Contudo, a aparente homogeneidade espacial da estrutura dos povoamentos é um aspecto que, frequentemente, dificulta observar as significativas variações existentes ao longo das áreas florestadas. Com isso, por meio das análises geoestatísticas, estratos homogêneos podem ser definidos desde as primeiras avaliações dos plantios, o que possibilita recomendar intervenções direcionadas para a maximização da produção, redução dos custos de condução e aumento da precisão dos inventários florestais. Dessa forma, este trabalho teve como objetivo aplicar análises geoestatísticas para modelar e mapear a variabilidade espacial da produção de povoamentos de teca no estado de Mato Grosso. Mediante um inventário florestal contínuo com 273 parcelas permanentes alocadas em 1.260 ha de plantios de teca, foram aplicadas a krigagem e a cokrigagem ordinárias para a estimativa da relação hipsométrica aos dois anos de idade e ao sexto ano, após o primeiro desbaste seletivo. Além disso, aplicou-se krigagem e cokrigagem ordinárias e krigagem indicatriz para a estimativa da altura dominante e mapeamento de classes de índice de sítio e de probabilidades da capacidade produtiva local; e krigagem e cokrigagem ordinárias para a estimativa do volume dos povoamentos ao quinto e ao oitavo ano de idade, anteriores ao primeiro e ao segundo desbaste seletivo. A avaliação e validação das análises foi baseada na soma de quadrados dos desvios ponderados, no coeficiente de determinação e na validação cruzada, além das análises de erros médios absoluto e relativo, raiz quadrada do erro médio quadrático, índice de concordância de Willmott e teste qui-quadrado. Com as análises geoestatísticas foi possível identificar as correlações espaciais existentes entre as variáveis dendrométricas e, desse modo, descrever e modelar a variabilidade espacial da relação hipsométrica, da capacidade produtiva do sítio florestal e do volume dos plantios de teca, para suas estimativas estatisticamente precisas na confecção de mapas temáticos. A coestimativa espacial da relação entre a altura total e o diâmetro a 1,3 m do solo viabilizou, estatisticamente, a estimativa da altura e o seu mapeamento nos povoamentos. Além disso, por meio da cokrigagem ordinária, aplicada às alturas dominantes e totais dos povoamentos de teca, os limites espaciais das classes de índice de sítio foram identificados e mapeados, ao passo que, com a krigagem indicatriz da altura dominante, foram delimitados os locais com a probabilidade maior de obter sítios mais produtivos. Ademais, a modelagem e o mapeamento da variabilidade espacial do volume e da área basal, como apoio aos inventários florestais tradicionais, possibilitaram recomendar práticas silviculturais e de ordenamento, as quais visam maximizar a produção volumétrica e a qualidade estrutural dos povoamentos. Palavras-chave: Relação altura/diâmetro. Classes de produtividade. Volume do povoamento. Variabilidade espacial. Krigagem. Cokrigagem. Krigagem indicatriz.<br>Abstract: Due to outstanding importance of the global forest sector and its perspective of return on investment in the short and medium term, teak stands in Brazil need information to guide the management of the crop for local conditions. However, the apparent homogeneity of the spatial structure of forest stands is an aspect that, often, makes it difficult to observe the significant variations along forested areas. Thus, basing on geostatistical analysis, homogeneous strata are defined from the first evaluations of the plantations, allowing to indicate interventions directed toward maximizing production, reducing cost of cropping and increase precision of forest inventories. Therefore, this study aimed to apply geostatistical analyses to model and to map spatial variabilities of the production of teak stands in Mato Grosso State. Through a continuous forest inventory with 273 permanent plots allocated in 1,260 ha of teak stands, allowed to apply ordinary kriging and cokriging to estimate the hypsometric relationship in two-year-old stands and in six-year-old stands, after the first selective thinning. Ordinary kriging and cokriging and indicator kriging were also applied to estimate dominant height and mapping site index classes and probability of local productive capacity; and ordinary kriging and cokriging were used to estimate stand volumes at the fifth and eighth years, before the first and second selective thinnings. The evaluation and validation of the analysis were based on the weighted sum of squares of deviations, coefficient of determination and cross-validation, in addition to the absolute and relative average errors, root mean square error, Willmott concordance index and chi-square. The geostatistical analyses identified the spatial correlations between dendrometric variables and, thus, they described and modeled the spatial variability of the hypsometric relationship, of the site productivity and volume of the teak stands for theirs statically precise estimates to make thematic maps. The spatial coestimation between total height and diameter at 1.3 m above the ground enabled, statistically, height estimating and its mapping in the stands. Moreover, by ordinary cokriging applied to dominant and total heights of teak stands, the spatial limits of the site index classes were identified and mapped, while, with the indicator kriging of dominant height, were delimited locals with highest probability of obtaining more productive sites. Furthermore, the modeling and mapping of volume and basal area spatial variabilities, as support for traditional forest inventories, made it possible to recommend silvicultural and management practices, which aim to maximize production volumetric and structural quality of the forest stands. Keywords: Height/diameter relationship. Productivity classes. Stand volume. Spatial variability. Kriging. Cokriging. Indicator kriging.
10
TRAZZI, P. A. "SUBSTRATOS RENOVÁVEIS NA PRODUÇÃO DE MUDAS DE Tectona grandis Linn F." Universidade Federal do Espírito Santo, 2011. http://repositorio.ufes.br/handle/10/4954.
Full textAbstract:
Made available in DSpace on 2016-08-29T15:36:54Z (GMT). No. of bitstreams: 1
tese_4538_.pdf: 2195593 bytes, checksum: e083b02273b8608248e1304e1a5360a3 (MD5)
Previous issue date: 2011-02-25<br>TRAZZI, Paulo André. Substratos renováveis na produção de mudas de
Tectona grandis Linn. F. 2011. Dissertação (Mestrado em Ciências Florestais)
- Universidade Federal do Espírito Santo, Alegre-ES. Orientador: Prof. Dr.
Marcos Vinicius Winckler Caldeira. Co-orientador: Prof. Dr. Aderbal Gomes da
Silva
Os resíduos industriais, urbanos ou agro-industriais podem ser utilizados como
fonte de nutrientes visando contribuir para a redução dos custos de produção
de mudas florestais. O presente trabalho teve por objetivo avaliar a utilização
de biossólido e estercos de animais como componente de substrato na
produção de mudas de Tectona grandis. As mudas foram produzidas em
tubetes com capacidade volumétrica de 280 cm³, preenchidos com dois grupos
de resíduos e constituindo dois estudos. O primeiro constituiu em formular
substratos com biossólido (BIO) associado à casca de arroz carbonizada (CAC)
ou à fibra de coco triturada (FC) nas proporções 80:20, 60:40, 40:60, 20:80
(v:v), e também com 100% de BIO, formando nove tratamentos a base de BIO
submetidos à comparação do tratamento com o substrato comercial florestal. O
segundo estudo se caracterizou por utilizar proporções (v:v:v) de 15, 25 ou
35% de esterco bovino (EB), cama de frango (CF) ou esterco de codorna (EC)
associados à terra de subsolo (60, 50 ou 40%, respectivamente) e à 25% de
substrato comercial florestal (volume fixo), formando um conjunto de nove
tratamentos que foram comparados ao tratamento com substrato comercial
florestal. Os substratos formados destes tratamentos foram submetidos às
análises químicas e físicas. As mudas foram submetidas à avaliação de
características morfológicas noventa dias após a repicagem. Para avaliar
nutricionalmente as mudas, a parte aérea foi submetida à analise química. Os
resultados da análise física mostraram que a CAC ou a FC associada ao BIO
proporcionaram aumento no volume total de poros (VTP) e redução da
densidade aparente (DENS). A CAC promoveu aumento na macroporosidade
(MAC), enquanto que a FC aumento na microporosidade (MIC). A utilização de
estercos de animais proporcionou aumento no VTP, na MAC e na MIC e uma
diminuição na DENS. Para as análises químicas, os substratos formulados com
BIO apresentaram altos teores totais e disponíveis de nutrientes. Os estercos
de animais promoveram incremento nos teores totais e disponíveis dos
substratos, principalmente P e K. Considerando os teores e acúmulos de
nutrientes, os maiores foram obtidos no tratamento com 80% de BIO + 20% de
CAC, para os tratamentos com biossólido. Para o estudo com estercos de
animais, o maior acúmulo de nutrientes foi observado no tratamento com 35%
de CF. O BIO com 60 e 80% associado à CAC ou a FC promoveu os maiores
ganhos em altura, diâmetro, massa seca da parte aérea e radicular, no
experimento com biossólido. As mudas produzidas com estercos de animais
apresentaram maiores índices biométricos nos substratos formulados com CF.
A utilização de substratos renováveis contribuiu na melhoria das características
físicas e químicas dos substratos formados e conseqüentemente na nutrição
das mudas e por isso pode ser indicada para produção de mudas florestais.
Palavras-chave: Teca, viveiro florestal, características morfológicas, análise
química, análise física, nutrição.
xii
Books on the topic "Tectona"
2
Ansari, S. A. Macropropagation of teak: Tectona grandis. Tropical Forest Research Institute, 2003.
Find full text
3
Tewari, D. N. A monograph on teak (Tectona grandis Linn.f.). International Book Distributors, 1992.
Find full text
4
Weaver, Peter L. Tectona grandis L. f., Teak: Verbenaceae, verbena family. International Institute of Tropical Forestry, U.S. Dept. of Agriculture, Forest Service, 1993.
Find full text
5
N, Sarojam, and Kerala Forest Research Institute, eds. An annotated bibliography on teak: Tectona grandis Linn. f. Kerala Forest Research Institute, 2005.
Find full text
6
Moht, Ni Win Moht. Comparative morphology and anatomy of two Myanmar species of the genus Tectona, T. grandis Linn. f. and T. hamiltoniana Wall. University of Mandalay, Dept. of Botany, 1997.
Find full text
7
Moht, Ni Win Moht. Comparative morphology and anatomy of two Myanmar species of the genus tectona, T. grandis linn. f. and T. hamiltoniana wall. University of Mandalay, Department of Botany, 1997.
Find full text
8
Moht, Ni Win Moht. Comparative morphology and anatomy of two Myanmar species of the genus Tectona, T. grandis Linn. f. and T. hamiltoniana Wall. University of Mandalay, Dept. of Botany, 1997.
Find full text
9
Burbank, Douglas W., and Robert S. Anderson. Tectonic Geomorphology. John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9781444345063.
Full textBook chapters on the topic "Tectona"
1
Khare, C. P. "Tectona grandis Linn. f." In Indian Medicinal Plants. Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-70638-2_1609.
Full text
2
Montag, Andreas. "Teakbaum, Gemeiner (Tectona grandis)." In Pflanzen und Haut. Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-63014-3_172.
Full text
3
Aswin, Sathyanarayanan, Selvi Pandiyan Ranjithkumar, and Selvaraju Sivamani. "Modelling and Simulation of Pyrolysis of Teak (Tectona Grandis) Sawdust." In Clean Energy Production Technologies. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-13-8637-4_12.
Full text
4
Suryatmojo, Hatma, and M. Ali Imron. "Hydrological Processes in Different Types of Teak (Tectona grandis L.) Plantation." In Sustainable Future for Human Security. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-5430-3_2.
Full text
5
Anilkumar, G. S., and P. E. Rajasekharan. "Cryopreservation of Pollen for Long-Term Storage in Teak (Tectona grandis)." In Springer Protocols Handbooks. Springer US, 2023. http://dx.doi.org/10.1007/978-1-0716-2843-0_58.
Full text
6
Lestari, Puji, Handojo H. Nurjanto, and Listianti. "Effect of Nitrogen (N) Concentration on the Morphology of Teak (Tectona grandis) Seedlings." In Proceeding of the 2nd International Conference on Tropical Agriculture. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97553-5_26.
Full text
7
McCalpin, James P. "Tectonic and Tectono-Seismic Hazards." In Encyclopedia of Natural Hazards. Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-1-4020-4399-4_48.
Full text
8
Kashiwaya, Kenji. "Tectonic (Tectono-Geomorphic) Forces on Systems." In Geomorphology of Lake-Catchment Systems. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-5110-4_4.
Full text
9
Hapid, Abdul, Ariyanti Ariyanti, Erniwati Erniwati, et al. "Phytochemical Analysis and Escherichia coli Anti-bacteria Activity of Teak (Tectona grandis Linn. f) Leaves Extract." In Proceedings of the 4th International Seminar on Science and Technology (ISST 2022). Atlantis Press International BV, 2023. http://dx.doi.org/10.2991/978-94-6463-228-6_31.
Full text
10
Buvaneswaran, C., M. George, K. Vinoth Kumar, and R. Velumani. "Relations Between Growth Traits and Wood Parameters of Tectona grandis L.f. in Even-Aged Plantations in Tamil Nadu." In Wood is Good. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3115-1_13.
Full textConference papers on the topic "Tectona"
1
Guerrero, Guillermo, Gustavo Betarte, and Juan Diego Campo. "Tectonic: An Academic Cyber Range." In 2024 IEEE Biennial Congress of Argentina (ARGENCON). IEEE, 2024. http://dx.doi.org/10.1109/argencon62399.2024.10735713.
Full text
2
Fitriyah, Ana, Chrisdina Aglistinova, Nadya Arsa Difa Rera, et al. "Pemanfaatan daun jati (Tectona grandis) sebagai pakan ternak: Review." In The 2nd National Conference of Applied Animal Science (CAAS) 2021. Politeknik Negeri Jember, 2021. http://dx.doi.org/10.25047/animpro.2021.2.
Full textAbstract:
Artikel ini bertujuan untuk mengetahui pemanfaatan daun jati (Tectona grandis) sebagai pakan ternak. Pakan memiliki peranan penting bagi ternak yakni untuk pertumbuhan dan produksi ternak. Indonesia memiliki banyak potensi alam yang dapat dijadikan sebagai pakan. Daun jati merupakan bagian dari pohon jati yang memiliki kandungan nutrient cukup baik dan berpotensi sebagai pakan ternak. Daun jati dapat mengantikan limbah pertanian dan hijauan terutama saat musim kemarau serta sebagai feed additive. Akan tetapi, pemberian daun jati tidak bisa diberikan secara langsung karena memiliki zat anti nutrisi tanin, tidak semua ternak dapat tahan terhadap zat anti nutrisi sehingga pemberian daun jati perlu pengolahan terlebih dahulu. Pengolahan daun jati selama ini dapat dilakukan melalui tiga acara yaitu dengan metode ekstraksi, penepungan, dan fermentasi. Hasil dari ketiga metode tersebut berbeda-beda sesuai tujuan pengolahannya. Penggunaan daun jati baik difermentasi, dimanfaatkan sebagai ekstrak dan tepung berpengaruh nyata terhadap produktivitas tenak. Hasil yang diperoleh yakni tepung daun jati pada level 1,2% efektif untuk menggantikan antibiotik sintetis. Fermentasi daun jati dengan dosis 10% efisien mengunakan bakteri Actinobacillus sp. dapat menurunkan kandungan serat kasar dan meningkatkan kandungan protein kasar. Suplementasi fitobiotik ekstrak daun jati dengan pemberian 1,6% mampu meningkatkan profil darah, khususnya trombosit, ayam petelur. Saran yang dapat diberikan untuk keberlanjutan pemanfaatan daun jati yaitu perlu dilakukan penelitian lebih lanjut untuk pemanfaatan daun jati pada ternak ruminansia.
3
Pratama, Anggi Tias, Apri Nuryanto, Bayu Rahmat Setiadi, Sa'adilah Rosyadi, Kintan Limiansi, and Nita Kusumawardani. "Alternative fuels from recycling dried leaves of Tectona grandis into briquettes." In VII INTERNATIONAL CONFERENCE “SAFETY PROBLEMS OF CIVIL ENGINEERING CRITICAL INFRASTRUCTURES” (SPCECI2021). AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0116493.
Full text
4
Adegoke, Samuel Oluwafikayo, Olugbenga Adebanjo Falode, and Princess Christiana Nwankwo. "Characteritization of Bio-Oil from Tectona Grandis as a Potential Scale Inhibitor." In SPE Nigeria Annual International Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/207132-ms.
Full textAbstract:
Abstract Calcium carbonate scales cause costly flow assurance problems in flowlines during petroleum production. Previous efforts to mitigate this problem using different chemical inhibitors though successful have resulted in environmental pollution during disposal. This study was designed to investigate the potential of bio-oil synthesized from Tectona grandis as an inhibitor to replace the conventional ones. Tectona grandis was obtained from Ibadan sawmill, Oyo state, Nigeria and characterized using Energy Dispersive X-Ray (EDX) analytical technique. Data generated by EDX analysis showed elemental composition of 78% carbon and 22% of other elements including nitrogen and oxygen. Tectona grandis was pyrolyzed at 5500C, a heating rate of 0.50C/sec, and a running time of 4 hours. 45.1% of the mixture of water and oil were collected and separated into phases in a centrifuge while the gasses were vented. The bio-oil was distilled at 120°C and analyzed using FTIR spectrometry. Spectra analyses showed the presence of -COOH and -CONH2 which are essential in the inhibition of calcium carbonate scale. With the help of a newly fabricated testing-rig system, calcium carbonate scales were formed by mixing equal mole of calcium chloride and sodium carbonate at the temperature range of 25-58°C and flow rates range of 8-15 ml/min, with/without inhibitor from 0, 5 g/l of maleic acid and 5 g/l of newly synthesized inhibitor. The mass of the calcium carbonate and the induction time was measured by the weighing balance and the conductivity meter respectively. For all of the experiments, the presence of maleic acid and newly synthesized inhibitor delayed the induction time by at least 10 mins and reduced the weight of calcium carbonates formed by at least 20%. Also, the mass of calcium carbonate scale formed at all the experiments showed less weight when newly synthesized inhibitor was used compared to when maleic acid inhibitor was used showing the effectiveness of the newly synthesized inhibitor over maleic acid. Therefore, this study shows high promise wood-based distilled oil as a potential calcium carbonate scale inhibitor and provides future direction for further studies.
5
Utama, Zuhdy Ilham, Dwi Aries Himawanto, and Dominicus Danardono Dwi Prija Tjahjana. "Slow pyrolysis of Tectona Grandis and Albizia Chinensis sawdust with thermogravimetry analysis." In THE 4TH INTERNATIONAL CONFERENCE ON INDUSTRIAL, MECHANICAL, ELECTRICAL, AND CHEMICAL ENGINEERING. Author(s), 2019. http://dx.doi.org/10.1063/1.5098255.
Full text
6
Khati, Unmesh, and Gulab Singh. "Temporal analysis of PolInSAR based forest height inversion for Tectona grandis and Eucalyptus plantations." In IGARSS 2016 - 2016 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2016. http://dx.doi.org/10.1109/igarss.2016.7730227.
Full text
7
Paula Cardoso Tavares, Ana, Edmilson Santos Cruz, and Thelma Shirlen Soares. "AVALIAÇÃO DE MODELOS POLINOMIAIS NÃO SEGMENTADOS NA ESTIMATIVA DE DIÂMETROS DE TECTONA GRANDIS L.F." In INIC 2023. Universidade do Vale do Paraíba, 2023. http://dx.doi.org/10.18066/inic0427.23.
Full text
8
Okeniyi, Joshua Olusegun, Olugbenga Adeshola Omotosho, Michael Anietie Inyang, et al. "Investigating inhibition of microbes inducing microbiologically-influenced-corrosion by Tectona grandis based Fe-nanoparticle material." In TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY: TMREES16-Cnam. Author(s), 2017. http://dx.doi.org/10.1063/1.4976253.
Full text
9
Kiram, Johannah Jamalul, Rossita Mohamad Yunus, Yani Japarudin, and Mahadir Lapammu. "Volumetric model estimation using regression and geostatistical application for the Tectona grandis stands in Sabah." In The 5TH ISM INTERNATIONAL STATISTICAL CONFERENCE 2021 (ISM-V): Statistics in the Spotlight: Navigating the New Norm. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0110076.
Full text
10
Aguilar-Arias, Heileen, Dagoberto Arias-Aguilar, Arleth Porras-Granados, David Romero-Badilla, and Cassia Soto-Montoya. "COMPARISON OF TECHNOLOGICAL TOOLS TO DETERMINE VEGETATION INDICES IN Tectona grandis PLANTATIONS, GUANACASTE, COSTA RICA." In 22nd LACCEI International Multi-Conference for Engineering, Education and Technology (LACCEI 2024): “Sustainable Engineering for a Diverse, Equitable, and Inclusive Future at the Service of Education, Research, and Industry for a Society 5.0.”. Latin American and Caribbean Consortium of Engineering Institutions, 2024. http://dx.doi.org/10.18687/laccei2024.1.1.2002.
Full textReports on the topic "Tectona"
1
เรือนแก้ว ดิษยทัต, นิพาดา. โครงสร้างสังคมพืชในพื้นที่ฟื้นฟูระบบนิเวศบริเวณพื้นที่จุฬาลงกรณ์มหาวิทยาลัย-สระบุรี อำเภอแก่งคอย จังหวัดสระบุรี (ระยะที่ 2) : รายงานผลการดำเนินงาน. จุฬาลงกรณ์มหาวิทยาลัย, 2015. https://doi.org/10.58837/chula.res.2015.40.
Full textAbstract:
การศึกษาโครงสร้างของสังคมพืชในป่าเต็งรังตามธรรมชาติและพื้นที่ฟื้นฟูระบบนิเวศบริเวณพื้นที่จุฬาลงกรณ์มหาวิทยาลัย-สระบุรี อำเภอแก่งคอย จังหวัดสระบุรี ซึ่งเป็นพื้นที่ฟื้นฟูด้วยการปลูกต้นกล้าสักสยามินทร์ และพื้นที่ฟื้นฟูด้วยต้นกล้าวงศ์ยางนาที่ชุบรากในเชื้อไมคอร์ไรซา การเก็บข้อมูลโครงสร้างสังคมพืชพบไม้ยืนต้นในพื้นที่ป่าเต็งรังธรรมชาติ จำนวน 4 ชนิด ได้แก่ รัง (Dipterocapus siamensis) โมก (Wrightea arborea) ตะคร้อ (Schleichera oleosa) และ แสลงใจ (Strychnos nux-vomica) ไม้ยืนต้นที่พบส่วนใหญ่มีขนาดเล็ก มวลชีวภาพเหนือพื้นดินของพื้นดินของไม้ยืนต้น 55.17 ตันต่อเฮกแตร์ แสดงให้เห็นว่าป่าเต็งรังนี้กำลังฟื้นตัวจากการรบกวนในอดีต พื้นที่ฟื้นฟูด้วยต้นกล้าสัก (Tectona grandis) พบต้นกล้า 9 ต้นซึ่งมีอัตราการอยู่รอดร้อยละ 78 จากเดือนมีนาคม ถึงกันยายน 2558 และพื้นที่ฟื้นฟูด้วยต้นกล้าวงศ์ยางนา พบต้นกล้าตะเคียน (Hopea odorata) และต้นกล้ายางนา (Dipterocarpus alatus) ซึ่งมีอัตราการอยู่รอดร้อยละ 78 และ 45 ตามลำดับ พื้นที่ฟื้นฟูระบบนิเวศทั้ง 2 บริเวณมีการปกคลุมของพืชคลุมดินตลอดระยะเวลาการศึกษา ลักษณะทางกายภาพของดินและปริมาณธาตุอาหารในดินมีความแตกต่างกันระหว่างพื้นที่และช่วงเวลาที่เก็บ การติดตามการเปลี่ยนแปลงโครงสร้างสังคมพืชจะเป็นตัวชี้วัดแสดงถึงผลของการฟื้นฟูระบบนิเวศ
2
เรือนแก้ว ดิษยทัต, นิพาดา. โครงสร้างสังคมพืชในพื้นที่ฟื้นฟูระบบนิเวศบริเวณพื้นที่จุฬาลงกรณ์มหาวิทยาลัย-สระบุรี อำเภอแก่งคอย จังหวัดสระบุรี : รายงานผลการดำเนินงาน. จุฬาลงกรณ์มหาวิทยาลัย, 2014. https://doi.org/10.58837/chula.res.2014.33.
Full textAbstract:
การศึกษาโครงสร้างของสังคมพืชในป่าเต็งรังตามธรรมชาติและพื้นที่ฟื้นฟูระบบนิเวศบริเวณพื้นที่จุฬาลงกรณ์มหาวิทยาลัย-สระบุรี อำเภอแก่งคอย จังหวัดสระบุรี ซึ่งเป็นพื้นที่ฟื้นฟูด้วยการปลูกต้นกล้าสักสยามินทร์ และพื้นที่ฟื้นฟูด้วยต้นกล้าวงศ์ยางนาที่ชุบรากในเชื้อไมคอร์ไรซา การเก็บข้อมูลโครงสร้างสังคมพืชพบไม้ยืนต้นในพื้นที่ป่าเต็งรังธรรมชาติ จำนวน 24 ต้น 3 ชนิด ได้แก่ รัง (Dipterocapus siamensis) โมก (Wrightea arborea) และ แสลงใจ (Strychnos nux-vomica) ไม้ยืนต้นที่พบมีขนาดเล็ก เส้นผ่านศูนย์กลางระดับอกระหว่าง 2.9-16.5 เซนติเมตร มวลชีวภาพเหนือพื้นดินของพื้นดินของไม้ยืนต้นและพืชคลุมดิน 53.01 ตันต่อเฮกแตร์ แสดงให้เห็นว่าป่าเต็งรังนี้กำลังฟื้นตัวจากการรบกวนในอดีต พื้นที่ฟื้นฟูด้วยต้นกล้าสัก (Tectona grandis) พบต้นกล้า 9 ต้นซึ่งมีอัตราการอยู่รอดร้อยละ 100 จากเดือนมีนาคม ถึงกันยายน 2557 และพื้นที่ฟื้นฟูด้วยต้นกล้าวงศ์ยางนา พบต้นกล้าตะเคียน (Hopea odorata) และต้นกล้ายางนา (Dipterocarpus alatus) ซึ่งมีอัตราการอยู่รอดร้อยละ 89 และ 64 ตามลำดับ พื้นที่ฟื้นฟูทั้ง 2 บริเวณมีการปกคลุมของพืชคลุมดินตลอดระยะเวลาการศึกษา และมีมวลชีวภาพของพืชคลุมดินเฉลี่ยระหว่าง 0.19-1.81 ตันต่อเฮกแตร์ ลักษณะทางกายภาพของดินและปริมาณธาตุอาหารในดินมีความแตกต่างกันระหว่างพื้นที่ การติดตามการเปลี่ยนแปลงโครงสร้างสังคมพืชจะเป็นตัวชี้วัดแสดงถึงผลของการฟื้นฟูระบบนิเวศ
3
Thomas, M. D. Magnetic and gravity characteristics of the Thelon and Taltson orogens, northern Canada: tectonic implications. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329250.
Full textAbstract:
Differences of opinion concerning the relationship between the Thelon tectonic zone and the Taltson magmatic zone, as to whether they are individual tectonic elements or two independent elements, have generated various plate tectonic models explaining their creation. Magnetic and gravity signatures indicate that they are separate entities and that the Thelon tectonic zone and the Great Slave Lake shear zone form a single element. Adopting the single-element concept and available age dates, a temporally evolving plate tectonic model of Slave-Rae interaction is presented. At 2350 Ma, an Archean supercontinent rifted along the eastern and southern margins of the Slave Craton. Subsequent ocean closure, apparently diachronous, began with subduction at 2070 Ma in the northern Thelon tectonic zone, followed by subduction under the Great Slave Lake shear zone at 2051 Ma. Subduction related to closure of an ocean between the Buffalo Head terrane and the Rae Craton initiated under the Taltson magmatic zone at 1986 Ma, at which time subduction continued along the Thelon tectonic zone. At 1970 Ma, collision in the northern Thelon tectonic zone is evidenced in the Kilohigok Basin. From 1957 to 1920 Ma, plutonism was active in the Taltson magmatic zone, Great Slave Lake shear zone, and southern Thelon tectonic zone. The plutonism terminated in the northern Thelon tectonic zone at 1950 Ma, but it resumed at 1910 Ma and continued until 1880 Ma. The East Arm Basin witnessed igneous activity as early as 2046 Ma, though this took place more continuously from 1928 to 1861 Ma; some igneous rocks bear subduction-related trace element signatures. These signatures, and the presence of northwest-verging nappes, may signify collision with the Great Slave Lake shear zone as a result of southeastward subduction, completing closure between the Slave and Rae cratons.
4
Zagorevski, A., and C. R. van Staal. Cordilleran magmatism in Yukon and northern British Columbia: characteristics, temporal variations, and significance for the tectonic evolution of the northern Cordillera. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/326063.
Full textAbstract:
Geochemical and temporal characterization of magmatic rocks is an effective way to test terrane definitions and to evaluate tectonic models. In the northern Cordillera, magmatic episodes are mostly interpreted as products of continental arc and back-arc settings. Re-evaluation of Paleozoic and Late Mesozoic magmatic episodes presented herein highlights fundamental gaps in the understanding of the tectonic framework of the northern Cordillera. In many cases, the character of magmatism and temporal relationships between various magma types do not support existing tectonic models. The present re-evaluation indicates that some of the magmatic episodes are best explained by lithospheric extension rather than arc magmatism. In addition, comparison to modern analogues suggests that many presently defined terranes are not the fundamental tectonic building blocks, but rather combine distinctly different tectonic elements that may not be related each other. Grouping of these distinctly different tectonic elements into single terranes hinders the understanding of Cordilleran evolution and its mineral deposits.
5
Dixon, J. Regional tectonic elements. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1996. http://dx.doi.org/10.4095/207662.
Full text
6
Gabrielse, H., J. W. H. Monger, J. O. Wheeler, and C. J. Yorath. Morphogeological Belts, Tectonic Assemblages and Terranes [Chapter 2: Tectonic Framework]. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/134073.
Full text
7
Berman, R. G., B. E. Taylor, W. J. Davis, M. Sanborn-Barrie, and J B Whalen. Crustal architecture and evolution of the central Thelon tectonic zone, Nunavut: insights from Sm-Nd and O isotope analysis, U-Pb zircon geochronology, and targeted bedrock mapping. Natural Resources Canada/CMSS/Information Management, 2024. http://dx.doi.org/10.4095/332497.
Full textAbstract:
New isotopic analyses (Sm-Nd, O, and U-Pb), targeted geological mapping, and previously published whole-rock geochemical data and high-resolution aeromagnetic surveys define ten crustal domains across the central Thelon tectonic zone. In the eastern Slave Craton, granitoid rocks in the Overby Lake domain are more isotopically evolved than in the Tinney Hills domain and include tonalite dated at 2.71 Ga. The 400 km long main leucogranite belt separates most early (ca. 2.07-1.95 Ga) Thelon tectonic zone plutonic belts from the Queen Maud Block. Oxygen isotopes support its formation via melting of a sedimentary source during peak metamorphism, which coincides with three, new 1.925-1.91 Ga leucogranite ages. Modelling of Nd-Sm isotopes indicates Neoarchean crust as basement to early Thelon tectonic zone plutonic belts. Detrital zircon geochronology suggests a 2.5 Ga basement component that is not recognized in exposed crustal domains, but is compatible with the Dharwar Craton, which can be paleomagnetically reconstructed adjacent to the Slave Craton at 2.2 Ga. Two tectonic models are discussed for the evolution of the Thelon tectonic zone in the convergent margin tectonic setting indicated by the whole-rock geochemistry and mantle-like oxygen isotopic compositions of plutonic rocks. In one model, ca. 2.1 Ga extension precedes east-dipping subduction, which leads to 1.97 Ga collision of the Slave Craton with a composite Thelon tectonic zone basement-Rae Craton, upper plate. The second model proposes a ca. 2.05 Ga Slave-microcontinent (Thelon tectonic zone basement) collision, followed by a polarity flip with west-dipping subduction, leading to ca. 1.95 Ga collision of the Rae Craton.
8
Scotese, C. R., and W. S. Mckerrow. Ordovician Plate Tectonic Reconstructions. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/132195.
Full text
9
Trettin, H. P. Chapter 4: Tectonic Framework. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/133963.
Full text
10
Gabrielse, H., and C. J. Yorath. Chapter 18: Tectonic Synthesis. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/134123.
Full text