Journal articles: 'Pterocarpus angolensi – Seedlings – Growth'

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Andrew, Egbe Enow, Tata Blessing Limbi, and Enow Elsie Ayamoh. "Response of Four Species of Tropical Timber Seedlings to Urea and Folivert Fertilisers in Nursery." JOURNAL OF ADVANCES IN AGRICULTURE 9 (January 2, 2019): 1579–93. http://dx.doi.org/10.24297/jaa.v9i0.7970.

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This study explores the effects of different levels of urea and folivert (composite fertilizer) on seedlings growth and chlorophyll concentration of Albizia zygia, Blighia welwitschii, Lophira alata and Pterocarpus soyauxii. The rate of fertilizer application per 5.87kg pot with topsoil was 3, 6, and 9g of both urea and composite fertilizer and a control (top soil only) and it was a complete randomized design. Results indicated that plants treated with 3g of urea produced the highest number of leaves in Albizia zygia seedlings only while 9g of composite fertilizer had the best growth performance in all the other growth variables. Albizia zygia and Blighia welwitschii, seedlings had the best results in soil treated with 6g of composite fertilizer, while Lophira alata and Pterocarpus soyauxii seedlings showed best growth in soils treated with 9g of composite fertilizers for all other parameters. Seedlings of species supplied with 9g of urea gave poorest growth performance. Low root/shoot ratios were obtained for all seedlings except for those of Albizia zygia treated with 6 and 9g of urea that had root/shoot ratios greater than 1.0. The effect of fertilizers on chlorophyll concentration was significantly different only for L. alata (P=0.05). This study therefore brings to light the need to fertilize timber tree seedlings in order to improve on their early growth performances in the field and high doses of nitrogen should be discourage.

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Saputra, Hariadi, Yadi Setiadi, and Iwan Hilwan. "RESPON PERTUMBUHAN BIBIT ANGSANA (Pterocarpus indicus Willd.) TERHADAP MEDIA TUMBUH, PEMOTONGAN AKAR LATERAL DAN PEMBERIAN URIN SAPI Response of Angsana (Pterocarpus indicus Willd.) Seedling on Growing Media, Lateral Roots Cutting, and Cow’s Urine." Journal of Tropical Silviculture 8, no. 3 (March 19, 2018): 154–59. http://dx.doi.org/10.29244/j-siltrop.8.3.154-159.

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Nursery is a process in producing good quality seedlings. Seedling quality is determined by physical-physiological quality including woody stem, health, height, diameter, number of leaves, leaf color and compactness of media. The quality of angsana seedlings in this study was observed using some growth media, lateral root cutting, and cow’s urine addition with various concentration and liquid organic fertilizer for 13 weeks. The study was conducted in a completely randomized design (CRD) in split plot with 3 growth mediums, 10 combinations of root-cutting and fertilizing treatment using 9 seedlings per treatment. Parameters observed during this study were seedling height (cm), seedling diameter (mm), total dry weight (g), shoot - root ratio (RPA) and compactness of roots. The results showed the media contain mixture of soil and manure (M2) with root-cutting treatment, addition of 20% cow urine and 5% EM4 (A2) was the best treatment for angsana seedlings with average value of 46.25 cm plant height, 6.09 mm diameter, 7.77 g total dry weight, shoot root ratio 1.89 and compactness of roots including the compact category.Key word : cow’s urine, lateral roots cutting, Pterocarpus indicus Willd., seedling quality.

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Rivera-Ocasio, Elsie, T. Mitchell Aide, and Neftalí Rios-López. "The effects of salinity on the dynamics of a Pterocarpus officinalis forest stand in Puerto Rico." Journal of Tropical Ecology 23, no. 5 (August 16, 2007): 559–68. http://dx.doi.org/10.1017/s0266467407004361.

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Coastal wetland plant communities are strongly structured by water depth and salinity. Rising sea level will cause changes in the hydro-period, surface water salinity and salt-water intrusion in coastal areas, which will reduce the distribution of forests in these areas. We studied the dynamics of a Pterocarpus officinalis stand in Puerto Rico over a 9-y period. We observed differences in plant growth, recruitment and mortality across a salinity gradient within a 1-ha plot. In areas of high salinity, recruitment, juvenile density and growth rates of juveniles and adults were lower. The detrimental effect of salinity was also observed in a growth experiment; seedlings in 5‰ and 10‰ salinity treatments had higher mortality, slower growth and less above- and below-ground biomass than control seedlings (0‰). In addition, an increase from 0 to 1‰ in salinity resulted in approximately 50% less nodulation in seedlings. Low recruitment in high salinity areas and lack of recruitment in adjacent grasslands will further reduce the distribution of this forest type. Although some ecosystems can respond to changing conditions by migration to more favourable areas, this is not the case with P. officinalis, and thus, restoration efforts are needed to re-establish this species where it occurred historically.

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Hendrik, Arnold Christian, and Yanti Daud. "Survival of Acacia leucophloea and Pterocarpus indicus Under Canopy of Acacia nilotica as Nurse Plants." Jurnal Penelitian Kehutanan Wallacea 9, no. 1 (March 31, 2020): 63. http://dx.doi.org/10.18330/jwallacea.2020.vol9iss1pp63-73.

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Acacia nilotica which is a plants of the genus Acacia which is known as one of the invasive genera. A. nilotica is very invasive due to several advantages it has such as very large seed production, seed dispersal far enough by wildlife, young plants to grow very fast and are resistant to drought and fire. Some invasive acacia species can act as nurse plants for native plants, which increases the photosynthetic efficiency of native plants, and protects native species from extreme temperatures. Therefore, it is important to know the chance of recolonizing native plants in areas that are invaded by foreign species, by looking at the performance of plants seedlings under A. nilotica stands. This study aims to determine the potential of A. nilotica invasive plants as nurse plants for local plants in East Timor. The stages in this research are the preparation of tools and materials, seeding of target species, selection of A. nilotica stands as a nurse plants, selection of healthy target species seedlings to be planted, planting of target species seedlings under A. nilotica stands, observing survival ability and species growth target. An analysis of the survival ability of the seedlings was carried out using the Kaplan-Meier survival curve. The results of this study are the angsana seedlings and kabesak in this study experienced many deaths, external factors such as high-temperature factors due to the long dry season suspected to be the cause. A. nilotica shade does not affect the survival of the angsana and kabesak seedlings, allelopathy produced by A. nilotica plants accompanied by a drought in a long period of time causes the plants is unable to act as nurse plants for kabesak and angsana plants.

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Dulormne, Maguy, Olivia Musseau, Félix Muller, Armel Toribio, and Amadou Bâ. "Effects of NaCl on growth, water status, N2 fixation, and ion distribution in Pterocarpus officinalis seedlings." Plant and Soil 327, no. 1-2 (June 24, 2009): 23–34. http://dx.doi.org/10.1007/s11104-009-0066-2.

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Bompy, Félix, Daniel Imbert, and Maguy Dulormne. "Impact patterns of soil salinity variations on the survival rate, growth performances, and physiology of Pterocarpus officinalis seedlings." Trees 29, no. 1 (September 24, 2014): 119–28. http://dx.doi.org/10.1007/s00468-014-1096-9.

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Karthikeyan, Arumugam, and Thangavel Arunprasad. "Growth response of Pterocarpus santalinus seedlings to native microbial symbionts (arbuscular mycorrhizal fungi and Rhizobium aegyptiacum) under nursery conditions." Journal of Forestry Research 32, no. 1 (December 5, 2019): 225–31. http://dx.doi.org/10.1007/s11676-019-01072-y.

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Ankalaiah, Chenchu, Thondaladinne Mastan, and Mullangi Sridhar Reddy. "A study on the density, population structure and regeneration of Red Sanders Pterocarpus santalinus (Fabales: Fabaceae) in a protected natural habitat - Sri Lankamalleswara Wildlife Sanctuary, Andhra Pradesh, India." Journal of Threatened Taxa 9, no. 9 (September 26, 2017): 10669. http://dx.doi.org/10.11609/jott.2869.9.9.10669-10674.

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Pterocarpus santalinus is a highly valued medium-sized leguminous endemic tree with a restricted range in the southern Eastern Ghats deciduous forests. The enumeration in four 1ha plots has yielded a total of 878 Red Sanders tree individuals (≥30cm girth at breast height - gbh) with a range of 165–246 individuals per ha and 9–51 individuals per 0.01ha. The size class structure revealed that the majority of individuals occurred in lower gbh classes with 364 individuals (39.5%) in 30–50 cm gbh class and 420 individuals (45.6%) in 51–70 cm gbh class, while in the higher gbh class (71–90 cm gbh) only 129 individuals (14%) and seven individuals in >90cm gbh class were recorded. Overall the population structure indicated a low ratio change in lower gbh classes suggesting a stable population. A higher percentage of life stages in recruitment stage like seedlings and saplings than trees was observed and the feature of re-sprouting from roots after fire damage was also recorded. A bottleneck progress from regenerating trees to adult trees was noticed, may be due to slow growth of the species. High stem density and presence of individuals in all the regenerating and reproductive classes suggest that Red Sanders is tolerant to mild disturbance. But the drastic reduction in the density in higher gbh class reflects the concern for recruitment in future as it may affect the seed output due to loss of reproductively fit mature trees.

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Bünger, Wiebke, Abhijit Sarkar, Jann Lasse Grönemeyer, Janina Zielinski, Rasmus Revermann, Thomas Hurek, and Barbara Reinhold-Hurek. "Root Nodule Rhizobia From Undomesticated Shrubs of the Dry Woodlands of Southern Africa Can Nodulate Angolan Teak Pterocarpus angolensis, an Important Source of Timber." Frontiers in Microbiology 12 (January 28, 2021). http://dx.doi.org/10.3389/fmicb.2021.611704.

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Pterocarpus angolensis, a leguminous tree native to the dry woodlands of Southern Africa, provides valuable timber, but is threatened by land conversion and overharvesting while showing limited natural regeneration. Nitrogen-fixing root nodule symbionts that could improve establishment of young seedlings have not yet been described. Therefore, we investigated the ability of P. angolensis to form nodules with a diverse range of rhizobia. In drought-prone areas under climate change with higher temperatures, inoculants that are heat-tolerant and adapted to these conditions are likely to be of advantage. Sources of bacterial isolates were roots of P. angolensis from nurseries in the Kavango region, other shrubs from this area growing near Pterocarpus such as Indigofera rautanenii, Desmodium barbatum, Chamaecrista sp., or shrubs from drought-prone areas in Namaqualand (Wiborgia monoptera, Leobordea digitata) or Kalahari (Indigofera alternans). Only slight protrusions were observed on P. angolensis roots, from which a non-nodulating Microbacterium sp. was isolated. Rhizobia that were isolated from nodules of other shrubs were affiliated to Bradyrhizobium ripae WR4T, Bradyrhizobium spp. (WR23/WR74/WR93/WR96), or Ensifer/Mesorhizobium (WR41/WR52). As many plant growth-promoting rhizobacteria (PGPR), nodule isolates produced siderophores and solubilized phosphate. Among them, only the Bradyrhizobium strains nodulated P. angolensis under controlled conditions in the laboratory. Isolates were further characterized by multilocus sequence analysis and were found to be distant from known Bradyrhizobium species. Among additional reference species tested for nodulation on P. angolensis, Bradyrhizobium vignae 7-2T and Bradyrhizobium namibiense 5-10T from the Kavango region of Namibia as well as Bradyrhizobium elkanii LMG6234T and Bradyrhizobium yuanmingense LMG21728T induced nitrogen-fixing nodules, while Bradyrhizobium diazoefficiens USDA110T and Bradyrhizobium tropiciagri SEMIA6148T did not. This suggests a broad microsymbiont range from Bradyrhizobium japonicum and B. elkanii lineages. Phylogenetic analysis of nodC genes indicated that nodulating bradyrhizobia did not belong to a specific symbiovar. Also, for I. rautanenii and Wiborgia, nodule isolates B. ripae WR4T or Mesorhizobium sp. WR52, respectively, were authenticated. Characterization of symbionts inducing effective root nodules in P. angolensis and other shrubs from Subsahara Africa (SSA) give insights in their symbiotic partners for the first time and might help in future to develop bioinoculants for young seedlings in nurseries, and for reforestation efforts in Southern Africa.

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Ogunsiji, A. O., and T. O. Ibrahim. "Comparative Effect of Decomposed Organic Matter on Seedling Growth of Pterocarpus erinaceus Poir. (Fabaceae)." International Journal of Plant & Soil Science, November 16, 2019, 1–7. http://dx.doi.org/10.9734/ijpss/2019/v30i530186.

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African kino tree (Pterocarpus erinaceus) plants are widely used species in afforestation programs but germination of seed and rate of seedling growth are major drawback. This study was therefore carried out to compare the effect of decomposed organic matter on the seedling growth rate of Pterocarpus erinaceus. The experiment was conducted in the screen house of Forestry Research Institute of Nigeria for a period of six months. Seedlings of P. erinaceus were subjected to four treatments. Decomposed kitchen waste (KW), decomposed fruit waste (FrW), decomposed fish waste (FW) and decomposed White leadtree (Leucaena leucocephala (LL)) leaves and control (CN). The experiment was laid out using a Completely Randomized Design. Each treatment was replicated seven times. Results showed that there was significant difference (P≤0.05) among the height of P. erinaceus seedlings subjected to different fertilizer applications. The mean seedlings height ranged from 11.55 to 18.34 cm with the highest mean height from seedlings subjected to LL while seedlings without fertilizer application had the least mean height. There was no significant difference (P≤0.05) among the collar diameter of P. erinaceus seedlings subjected to different fertilizer applications. The mean seedlings collar diameter ranged from 1.27 to 1.94 mm with the highest mean collar diameter from seedlings subjected to FW while seedlings without fertilizer application (CN) had the least mean collar diameter. Results also indicated no significant difference (P≤0.05) among the number of leaves of P. erinaceus seedlings subjected to different fertilizer applications. The mean seedlings number of leaves ranged from 12 to 16 with the highest mean number of leaves from seedlings subjected to LL, KW and FW while seedlings without fertilizer application had the least mean number of leaves. It is recommended that application of decomposed organic matter for proper growth of Pterocarpus erinaceus seedlings should be encouraged and properly disseminated to farmers.

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Musa, F. B., F. M. Jayeoba, V. A. Olayiwola, E. A. Adekunle, and F. O. Abiodun. "Residual Effect of Organic Manure (Biochar and Cowdung) on the Growth of Pterocarpus osun." Current Journal of Applied Science and Technology, October 2, 2019, 1–6. http://dx.doi.org/10.9734/cjast/2019/v37i530336.

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The present study aims to determine the residual effects of organic manure (biochar and cowdung) growth of P. osun under a screen house condition. Implementing the use of biochar and different organic sources has been proposed as an option for improving soil fertility, restoring degraded land and sequester large amounts of carbon (C) over the long-term. The study was carried out in Forestry Research Institute of Nigeria. Pterocarpus osun seeds were collected from the botanical garden at the University of Ibadan. The media for planting (soil) and treatments used had already been established from previous experiments done by using same species (Pterocarpus osun). Seedlings of P. osun were raised in a germination basket for four (4) weeks and twenty four (24) healthy seedlings were selected from the basket on the basis of uniform treatments and then transplanted into the already established media and the experiments were arranged in a completely randomized design (CRD). Data on growth parameters (plant height, number of leaves), collar diameter and dry matter yields were generated and subjected to analysis of variance. The significant means were separated by using LSD at 5% level of significance. The results showed that the interaction of Biochar + Cow dung (30 t/ha +135 g) had the highest diameter with a value of 5.17 mm when compared with the control (no amendments). The highest plant height was recorded by the interaction of biochar and cow dung at 20 t/ha +135 g with mean value of 11.73 cm while sole application of cow dung also performed well in number of leaves with a mean value 11.50 as compared with the control (no amendment). It is concluded that there is a residual effect in the interaction of biochar and cow dung, which ultimately improves the performance of Pterocarpus osun.

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Husna, Husna, Faisal Danu Tuheteru, and Asrianti Arif. "Arbuscular mycorrhizal fungi to enhance the growth of tropical endangered species Pterocarpus indicus and Pericopsis mooniana in post gold mine field in Southeast Sulawesi, Indonesia." Biodiversitas Journal of Biological Diversity 22, no. 9 (August 28, 2021). http://dx.doi.org/10.13057/biodiv/d220930.

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Abstract. Husna, Tuheteru FD, Arif A. 2021. Arbuscular mycorrhizal fungi to enhance the growth of tropical endangered species Pterocarpus indicus and Pericopsis mooniana in post gold mine field in Southeast Sulawesi, Indonesia. Biodiversitas 22: 3844-3853. Gold mining activities contribute to the national economy, but have a serious impact on forest and environmental degradation and pose a threat to tree species in the tropics. Reforestation of post-gold mining with tropical legume tree species is threatened with extinction. Arbuscular mycorrhizal fungi are effective in conservation of endangered plants and restoration of degraded land. The objective of the study was to evaluate the effect of native AM Fungi inoculation on the growth of Pterocarpus indicus and Pericopsis mooniana in nurseries and post-gold mining fields. P. indicus and P. mooniana seedlings were inoculated with Glomus claroideum Schenk & Smith, Glomus coronatum Giovann., and mixed AMF (G. claroideum, G. coronatum). Uninoculated seedlings were used as control treatment, and they were maintained for 4 months under greenhouse conditions. After 4 months in greenhouse, seedlings were transferred to post-gold mine and planted for 4 months. The percentage of AMF colonization, plant growth, nutrient content and uptake of N, P, K, Fe, Mn were measured after 4 months both in the greenhouse and the field. The percentage of AMF colonization under greenhouse conditions in P. indicus and P. mooniana ranged 5.67-75.3% and 2.2-41.2%. All AMF colonization tended to have higher shoot height, leaf numbers and nodules, plant dry weight and N, P, K content under greenhouse conditions. Shoot height, stem diameter, leaf dry weight, N, P, K, Mn and Fe under field conditions had higher inoculated seedlings than control four months after planting. AMF could be used to conserve endangered tree species in post-gold mining reforestation in the tropics.

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MANIPOL, MARJORIE M., CRUSTY E. TINIO, LERMA SJ MALDIA, and Marilyn S. Combalicer. "Salinity-induced changes in the morphology, physiology, and anatomy of seeds and seedlings of smooth narra (Pterocarpus indicus Willd. f. indicus)." Biodiversitas Journal of Biological Diversity 21, no. 11 (October 14, 2020). http://dx.doi.org/10.13057/biodiv/d211120.

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Abstract. Manipol MM, Tinio CE, Maldia LSJ, Combalicer MS. 2020. Salinity-induced changes in the morphology, physiology, and anatomy of seeds and seedlings of smooth narra (Pterocarpus indicus Willd. f. indicus). Biodiversitas 21: 5146-5154. Pterocarpus indicus Willd. forma indicus is a commonly planted species for reforestation in the Philippines regardless of the area’s condition. Since the species could survive in areas even with harsh conditions, it was hypothesized that the species may also thrive in areas having substantial amount of salt, especially during its early growth. This study assessed the morphological, physiological, and anatomical responses of seeds and seedlings of P. indicus Willd. f. indicus (Fabaceae), a native species in the Philippines to varying salt (NaCl) concentrations (0-300 mM). Based on the results, P. indicus f. indicus grew significantly in terms of height, number of leaves, leaf area, root collar diameter (RCD), root nodules, and root-shoot ratio in the control and at 100 mM NaCl. On the other hand, the growth of the species was suppressed at 300 mM NaCl. The physiological characteristics (germination, survival, and photosynthetic rates) were also high in the control compared to the NaCl treatments. As for the seed anatomical characteristics, the radicle cells remained undamaged, with high cell number and longer cells in the control, but showed damaged and reduced cell number and length at 300 mM NaCl. This indicates that P. indicus f. indicus can only tolerate moderate saline soil conditions. Hence, this result needs to be considered in reforestation efforts of the country using this species.

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Jaisankar, Iyyappan, R. Jayakumara Varadan, S. Vijayakumar, Nitiprasad Namdeorao Jambhulkar, Bosco Augustine Jerard, Nabanita Ganguly, Muthu Rajkumar, Ezekiel Manasseh Moses, and Putcha Simhachalam. "Efficacy of Clonal Propagation in Andaman Padauk (Pterocarpus dalbergioides): Augmenting Conservation of an Endemic Ornamental Timber Species of Andaman & Nicobar Islands, India." Forest Science, August 16, 2021. http://dx.doi.org/10.1093/forsci/fxab029.

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Abstract The population of Andaman padauk (Pterocarpus dalbergioides Roxb.), an endemic ornamental timber species, is fast depleting in the Andaman Islands. Afforestation through seedlings is hindered by low germination and high mortality rates. This study attempts to assess the efficacy of clonal propagation methods to hasten mass multiplication by trying out different combinations of growth hormones, concentration, and dipping duration in semi-hardwood stem cuttings and different combinations of growth hormone concentration and substrate in air layering. Dipping the cuttings in indole-3-butyric acid (IBA) 1,500 ppm for 24 hours and spraying the modified stem-cut layers with IBA 2,000 ppm and binding with top soil and decomposed coir dust turned out to be the best treatment combination for cutting and air layering, respectively. Among the considered factors, the concentration of growth hormone is crucial for cutting, as the performance is enhanced with concentration under a given growth hormone and dipping duration. Similarly, the substrate is crucial for air layering, as modified stem-cut air layers bound with top soil and decomposed coir dust not only achieve the best performance, but also catalyze IBA for further improvement when other substrates remain unresponsive. Successful outcome of both clonal propagation techniques gives hope for disseminating the species across the tropics at global level. Study Implications: Low germination and high mortality render propagation of Pterocarpus dalbergioides through seeds inefficient. This study has revealed an optimal combination of growth hormone and its concentration, dipping duration, and substrate to efficiently propagate this tree through stem cutting and air layering. The findings will help disseminate the highly valuable yet endangered timber species not only in its natural habitat of Andaman Islands but across the globe where there are favorable climatic conditions. As all the species under the pantropical Pterocarpus genus share similar growth and reproductive traits, the optimized treatment combination will be applicable to other species whose existence is threatened in their habitat.

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N. A. Onguene. "Growth response of Pterocarpus soyauxii and Lophira alata seedlings to host soil mycorrhizal inocula in relation to land use types." African Journal of Microbiology Research 5, no. 17 (September 9, 2011). http://dx.doi.org/10.5897/ajmr10.061.

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Onguene, NA, LEM Ngonkeu, and T. Kuyper. "Growth response of Pterocarpus soyauxii and Lophira alata seedlings to host soil mycorrhizal inocula in relation to land use types." Cameroon Journal of Experimental Biology 6, no. 2 (August 2, 2011). http://dx.doi.org/10.4314/cajeb.v6i2.68523.

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Journal articles on the topic 'Pterocarpus angolensi – Seedlings – Growth'

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