Journal articles: 'Grevillea robusta Growth'

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Shadrack Kinyua Inoti and Jemimah Achieng Ocholla. "Manure soil amendment for Grevillea robusta seedlings in the Kenyan highlands." Open Access Research Journal of Life Sciences 4, no. 2 (November 30, 2022): 043–49. http://dx.doi.org/10.53022/oarjls.2022.4.2.0077.

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Grevillea robusta seedlings are of high demand in Kenyan agricultural landscapes especially in agroforestry systems, yet the ideal soil mixture is not identified. This experiment was to determine the ideal potting soil mixture for Grevillea species. A Complete Randomized Design (CRD) with 4 treatments replicated 3 times was employed. Four treatments were used; Forest soil, Agricultural soil, Forest soil + Manure and Agricultural soil + Manure. The experiment was done for 8 months in 2020 at Egerton University tree nursery. Data was collected on seedling survival, height, root and foliage variables. One-way ANOVA was performed on the measured variables using SAS statistical package while the means were separated using LSD at P< 0.05. Results showed that Agricultural soil + Manure was significantly higher (P<0.05) in all the shoot and foliage variables compared with Agricultural soil alone except for internode length. Besides, Agricultural soil + Manure showed similar growth performance with Forest soil alone. However, the former showed significantly higher leaf length (20.2 cm) compared with Forest soil + Manure (14 cm). Results showed that Forest soil and Agricultural soil + Manure had significantly higher (P<0.05) root biomass compared with Agricultural soil (2.77 g), while root collar diameter, root length and root to shoot ratio were similar. It is, therefore, recommended that tree nurseries located far from forests can use a potting soil mixture of Agricultural soil + manure in raising Grevillea seedlings since this gives similar growth performance with forest soil.

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Martiarena, Rodolfo A., Alejandra Von Wallis, Roberto A. Fernández, and Otto E. Knebel. "EFFECT OF ESTABLISHMENT TECHNIQUE COMBINATIONS ON INITIAL GROWTH OF Grevillea robusta A. Cunn." Revista Chapingo Serie Ciencias Forestales y del Ambiente XIX, no. 3 (December 2013): 387–97. http://dx.doi.org/10.5154/r.rchscfa.2012.07.046.

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Kalinganire, A., and John B. Hall. "Growth and biomass production of young Grevillea robusta provenances in Rwanda." Forest Ecology and Management 62, no. 1-4 (December 1993): 73–84. http://dx.doi.org/10.1016/0378-1127(93)90042-l.

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Oke, D. O., and G. Owoeye . "Early Growth and Nutrient Accumulation of Grevillea robusta A. Cunn. in G. robusta/Maize Intercrop." Journal of Agronomy 4, no. 1 (December 15, 2004): 58–60. http://dx.doi.org/10.3923/ja.2005.58.60.

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Shadrack Kinyua Inoti and Doris Cherop. "Influence of pot size on early seedling growth of Grevillea robusta and Cupressus lusitanica in Kenya." International Journal of Science and Technology Research Archive 4, no. 1 (January 30, 2023): 096–102. http://dx.doi.org/10.53771/ijstra.2023.4.1.0011.

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Pot size is vital for raising of nursery seedlings. Different sizes of pots are needed for various tree species. An experiment was set up to investigate the best pot size for Cupressus lusitanica and Grevillea robusta species. The experiment was laid down as a RCBD with 8 treatments replicated 3 times. Treatments comprised of 4 different pot sizes as follows: large, medium, small and smallest as well as two species. Forest soil mixture was used for potting and 10 pots were used per each treatment per replicate while 7 plants were randomly selected for sampling. The experiment was carried out from September 2017 for a period of 8 months. The variables measured included; shoot, foliage and roots. ANOVA was done using Genstat package while the means were separated at P< 0.001 using LSD. The results showed that large pots had significantly (P<0.001) higher values in height, shoot fresh biomass, total fresh plant biomass and seedling stem volume compared with the other pot sizes. Large pots also showed significantly higher root collar diameter (6.23 mm) compared with the medium pot (4.33 mm). For species, Cypress showed significantly superior height (27.84 cm) and number of leaves (24.52) compared with Grevillea (18.73 and 18.27 cm respectively). In conclusion, shoot fresh biomass and total fresh plant biomass were positively correlated with pot size. This study recommends the use of large pots for raising Grevillea and Cypress seedlings in the nursery since they take 8 months to attain planting size.

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Dordel, Julia, Suzanne W. Simard, Jürgen Bauhus, Robert D. Guy, Cindy E. Prescott, Brad Seely, Hermann Hampel, and Luciano J. Pozas. "Effects of nurse-tree crop species and density on nutrient and water availability to underplanted Toona ciliata in northeastern Argentina." Canadian Journal of Forest Research 41, no. 9 (September 2011): 1754–68. http://dx.doi.org/10.1139/x11-093.

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Cultivation of high-value hardwoods is often more difficult than cultivation of many pioneer species commonly used in fast-growing plantations. On some sites, the facilitative effects of nurse trees can be necessary for initial crop species establishment, but their competitive effects can also reduce juvenile growth rates of the crop species. To improve establishment success in mixed-species plantations, we tested the effects of the nurse-tree species Grevillea robusta A.Cunn. ex R.Br., Pinus elliottii Engelm. × Pinus caribaea Morelet, and Pinus taeda L. and four densities (0%, 25%, 50%, and 75% of the initial density) on Toona ciliata M.Roem. light, soil water, and soil nutrient availability. Growth of T. ciliata tended to increase with decreasing nurse-tree density and increasing light availability. However, growth was greater under G. robusta than under the pines, even where light conditions were similar, corresponding to mostly higher nutrient availability and higher soil water contents underneath G. robusta. Wood δ13C of T. ciliata was positively correlated with growth, foliar nutrient contents (N, P, K, Mg, Ca), and soil water content at a depth of 20–40 cm. Our results suggest that G. robusta is less competitive for soil nutrients and water than the pine nurse-tree species.

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Kasekete, Désiré Katembo, Gauthier Ligot, Jean-Pierre Mate Mweru, Thomas Drouet, Mélissa Rousseau, Adrien Moango, and Nils Bourland. "Growth, Productivity, Biomass and Carbon Stock in Eucalyptus saligna and Grevillea robusta Plantations in North Kivu, Democratic Republic of the Congo." Forests 13, no. 9 (September 16, 2022): 1508. http://dx.doi.org/10.3390/f13091508.

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Initiated by the World Wildlife Fund (WWF) more than a decade ago in North Kivu, single-species plantations of Eucalyptus saligna and Grevillea robusta constitute, with other village plantations, the current legal source of wood-energy for the communities bordering the Virunga National Park (PNVi). This study assesses the growth and productivity of these plantations in two sites with different soil and climatic conditions to predict their production over time. The study also assesses the carbon stock and long-term CO2 fixation in the biomass of the studied plantations to deduce their contribution to climate change mitigation. Non-destructive inventories were carried out during three consecutive years in 20 E. saligna and 12 G. robusta plantations in Sake and Kirumba. Analysis of the data revealed that both species have similar diametric growth while height growth and productivity were significantly higher in the E. saligna plantations. The productivity of E. saligna was also higher in Kirumba than in Sake, while that of G. robusta was higher in Sake than in Kirumba. The differences observed were mainly related to species, silviculture, altitude and concentration of bioavailable elements in the soils. The analysis of productivity evolution over time allowed us to determine optimal rotations at 8 and 12 years, respectively, for E. saligna and G. robusta plantations. The relationships between biomass or carbon stock and tree diameter were not different between the studied species but were significantly different at the stand level. If silviculture was standardized and plantations carefully monitored, carbon stock and long-term CO2 fixation would be higher in G. robusta plantations than in E. saligna plantations. These results indicate that while for productivity reasons E. saligna is the favoured species in wood-energy plantations to quickly meet the demand of the growing and disadvantaged population living in the vicinity of PNVi, carefully monitored G. robusta plantations could be more interesting in terms of carbon credits. To simultaneously optimise wood-energy production and carbon storage in the plantations initiated in North Kivu, E. saligna and G. robusta should be planted in mixture. In addition, species and site characteristics adapted silvicultural management practices must be applied to these plantations, which are very important for the region, its population and its park. Finally, the economic profitability as well as the sustainability of the plantations should be assessed in the longer term in North Kivu.

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Takaoka, Sadao. "Long-term growth performance of Cordia africana and Grevillea robusta trees in the Mount Kenya region." Agroforestry Systems 74, no. 1 (June 24, 2008): 111. http://dx.doi.org/10.1007/s10457-008-9161-2.

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Takaoka, Sadao. "Long-term growth performance of Cordia africana and Grevillea robusta trees in the Mount Kenya region." Agroforestry Systems 72, no. 3 (March 22, 2007): 169–72. http://dx.doi.org/10.1007/s10457-007-9056-7.

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Cock, Ian Edwin. "Grevillea juncifolia Hook. and Grevillea robusta A. Cunn. Ex. R. Br. Methanolic Leaf and Flower Extracts Inhibit the Growth of Gram Positive and Gram Negative Bacteria." Pharmacognosy Communications 9, no. 3 (June 22, 2019): 112–17. http://dx.doi.org/10.5530/pc.2019.3.23.

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Lott, J. E., S. B. Howard, C. K. Ong, and C. R. Black. "Long-term productivity of a Grevillea robusta-based overstorey agroforestry system in semi-arid Kenya: I. Tree growth." Forest Ecology and Management 139, no. 1-3 (December 2000): 175–86. http://dx.doi.org/10.1016/s0378-1127(00)00266-8.

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Kaur, Balwinder, and Narender Singh Atri. "EFFECT OF GROWTH REGULATORS AND TRACE ELEMENTS ON THE VEGETATIVE GROWTH OF PLEUROTUS SAPIDUS QUÉL." International Journal of Pharmacy and Pharmaceutical Sciences 8, no. 11 (October 28, 2016): 283. http://dx.doi.org/10.22159/ijpps.2016v8i11.14200.

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Objective: The present study was undertaken to investigate the effect of biochemical sources viz., growth regulators and trace elements on the vegetative growth of Pleurotus sapidus Quél. It has a great commercial potential being an edible and wood decaying fungus. Mushrooms need carbon and nitrogen for structural and functional purposes in addition to trace elements, growth regulators and vitamins. Therefore, evaluation of their role in influencing the growth of the mushroom is a necessary aspect to be studied.Methods: Fresh sporocarps of P. sapidus were collected from rotten stumps of Grevillea robusta A. Cunn. ex R. Br and its pure culture was raised on Potato Dextrose Agar medium. The malt broth liquid medium at 28±1 °C was used as a basal medium for investigating the role of growth regulators (gibberellic acid, indole-3-acetic acid, indole-3-butyric acid and kinetin) and trace elements (manganese, iron, molybdenum, boron and zinc). Different concentrations of growth regulators and salts with trace elements were added to separate medium flask to compare the growth.Results: The comparative study of various concentrations of growth regulators and trace elements has shown that the cultures supplemented with 5 ppm gibberellic acid and 5 ppm boron, respectively gave maximum mycelial growth of P. sapidus.Conclusion: The vegetative growth of P. sapidus can be enhanced by adding gibberellic acid and boron in the basal medium.

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Nath, Cheryl D., Raphaël Pélissier, B. R. Ramesh, and Claude Garcia. "Promoting native trees in shade coffee plantations of southern India: comparison of growth rates with the exotic Grevillea robusta." Agroforestry Systems 83, no. 2 (April 21, 2011): 107–19. http://dx.doi.org/10.1007/s10457-011-9401-8.

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Kellman, Martin. "Nutrient retention by tropical ecosystems: soil adsorption and plant absorption as synergistic processes." Journal of Tropical Ecology 18, no. 6 (September 25, 2002): 877–95. http://dx.doi.org/10.1017/s0266467402002572.

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Laboratory and growth-chamber experiments were used to evaluate whether there was evidence for nutrient retention by tropical terrestrial ecosystems being a two-stage process involving first soil adsorption and then plant absorption. Quartz sand with and without Fe and Al oxide coatings were treated with nutrient solution, then subjected to a leaching regime that simulated early wet-season conditions at a tropical location. Nutrient cations applied were rapidly lost in the initial leaches from quartz sand without oxide coatings, but showed a more gradual loss from oxide-coated sand, indicating temporary adsorption by the latter. In a second experiment, oxide-coated sand with and without seedlings of Grevillea robusta (a non-mycorrhizal tree species) were subjected to a similar treatment and leaching losses were compared. The presence of seedlings significantly reduced the losses of all nutrient cations, with the effect being minimal for Na and greatest for K, confirming that plants can gain access to temporarily adsorbed nutrients. More typical tropical soil-vegetation systems are likely to possess properties that magnify both the adsorptive and absorptive processes that have been documented in these experiments, justifying extrapolation of the experimental results to these natural systems. The existence of a two-stage process of nutrient retention provides a plausible explanation for the resistance of most tropical ecosystems to rapid loss of nutrients following events such as fires, which provide acute nutrient loading to the system.

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Keneni, YG, AF Senbeta, and G. Sime. "Role of small-scale trees plantation and farmers' attitude and skill toward propagation of indigenous and exotic trees: The case of Sidama, Ethiopia." African Journal of Food, Agriculture, Nutrition and Development 21, no. 105 (December 24, 2021): 18804–23. http://dx.doi.org/10.18697/ajfand.105.19045.

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The tree land cover in Ethiopia is declining due to deforestation, agricultural land expansion, overgrazing, firewood use and construction. Farm tree plantation has a potential to improve tree cover and the country's vision towards reducing greenhouse gases (GHG) emission by 2030. This study was conducted in Sidama of Ethiopia to assess the role of small-scale tree plantations, and the attitudes and skills of farmers in propagating and conserving indigenous trees as compared to exotic ones, and to identify major impediments for exotic and indigenous tree plantation. By using stratified random sampling, 149 household heads were selected and interviewed, and the tree plantation practices of 46 randomly selected farmers were observed. Advice and support given to farmers concerning tree plantation and nursery care were collected from 16 Woreda Rural Development Experts. During the study a total of 46 tree species were identified, and 92% of the trees on the farmland were exotic. The percentage composition of the five most dominant tree species were Eucalyptus spp. (79.6%), Cupressus spp (8.5%), Cordia africana (4.8%), Grevillea robusta (3.3%), and Millettia ferruginea (1.8%). The trees provide several direct and indirect socio-economic and ecological importance (construction, fuel, income, medicinal value, fencing, asset for present and next generation, fodder for livestock, garden shade, aesthetic, recreation, spiritual value, improve soil fertility and environmental impact remediation). The majority of farmers prefer exotic trees due to their fast growth, ease of nursery preparation and fast establishment, and higher income generation in shorter period. Though farmers like to plant indigenous trees for their ecological services such as improving soil fertility, producing durable household utensils, shading and other ecological values; land shortage and lack of knowledge on plant biology, nursery preparation and propagation method constrained its plantation. Therefore, introduction of appropriate technologies to the existing farming system is required for sustainable indigenous tree plantation in the study area.

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Nsengumuremyi, Concorde, Eberhard Fischer, Donat Nsabimana, Marco Harbusch, Siegmar Seidel, Marie Chantal Zaninka, JMV Senyanzobe, Bertrand Uwimana, and Liliane Mutayomba. "Carbon Sequestration and Carbon Stock of Agroforestry Tree Species Around Cyamudongo Isolated Rain Forest and Arboretum of Ruhande, Rwanda." Turkish Journal of Agriculture - Food Science and Technology 10, no. 12 (December 20, 2022): 2597–608. http://dx.doi.org/10.24925/turjaf.v10i12.2597-2608.5251.

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Agroforestry (AF) is widely considered the most important tool to mitigate climate change-related issues by removing Carbon (C) Dioxide (CO2) from the atmosphere and storing C. Therefore, this study aims to broaden current knowledge on the impact of sustainable Agroforestry (AF) on the C sequestration rate and C stock in the surroundings of Cyamudongo isolated rain forest and Ruhande Arboretum. To understand this, the permanent sample plots (PSPs) were established mainly in the four designed transects of four km long originating on the Cyamudongo isolated rain forest boundary following the slope gradient ranging from 1286 to 2015 m asl. A total number of 73 PSPs were established in the Cyamudongo study area while 3 PSPs were established in the Ruhande AF plot. The Arc Map GIS 10.4 was used to design and map the sampling areas while GPS was used for the localization of the plots. Statistical significance was analyzed through R-software. The estimated quantity of sequestrated C for 2 years and 34 years of AF species was 13.11 t C ha -1 yr-1 (equivalent to 48 t CO2 ha -1 yr-1) and 6.85 t ha-1 yr-1 (equivalent to 25.1 t CO2 ha -1 yr-1) in Cyamudongo and Ruhande respectively. The estimated quantity of C stored by the Ruhande AF plot is 232.94 t ha-1. In Cyamudongo, the overall C stored by the AF systems was 823 t ha-1 by both young tree species established by the Cyamudongo Project (35.84 t ha-1) and C stored by existing AF species before the existence of the Project (787.12 t ha-1). In all study areas, the Grevillea robusta contributed more to overall stored C. The correlation coefficients between tree diameter and living biomass ranged from moderate to very strong due to differences in terms of age, stage of growth, and tree species.

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Leal, Alex Carneiro, and André Luiz Medeiros Ramos. "DESEMPENHO DE CINCO PROCEDÊNCIAS DE Grevillea robusta NO NORTE DO PARANÁ." FLORESTA 41, no. 2 (June 30, 2011). http://dx.doi.org/10.5380/rf.v41i2.21876.

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A Grevillea robusta é uma espécie arbórea nativa das regiões subtropicais costeiras da Austrália. Foi uma das primeiras plantas da Austrália cultivada fora de sua área de ocorrência natural, principalmente como ornamental. Essa espécie é recomendada para plantio nas regiões mais quentes do Paraná, sendo apreciada para arborização de lavouras de café. Com o objetivo de comparar o desempenho de procedências de G. robusta, instalou-se um experimento no município de Londrina, PR. Quatro procedências australianas foram fornecidas pela Divisão Florestal da CSIRO (Commonwealth Scientific and Industrial Research Organization) e a procedência local foi coletada no município de Cianorte, PR. Aos 10 anos de idade, a produção volumétrica dos materiais importados foi superior à do material local em 68,5%, 61,2%, 50,6% e 39,7% para as procedências Boyd, Woodenbong, Wivenhoe e Emu Vale, respectivamente. Todas as procedências australianas apresentaram crescimento superior ao da fonte local comercial. A procedência Wivenhoe se destacou pelo crescimento em altura, enquanto a procedência Boyd apresentou maior crescimento diamétrico e em volume. Conclui-se que a substituição das fontes de sementes disponíveis comercialmente no Paraná por sementes de procedências selecionadas pode aumentar a produtividade de Grevillea robusta na região norte do Paraná.Palavras-chave: Grevillea robusta; teste de procedências; cultivos florestais. AbstractGrowth performance of Grevillea robusta provenances in northern Parana. Grevillea robusta, a native species of subtropical coastal areas of Australia, is successfully cultivated in several countries. It is recommended for planting in warmer regions of Paraná where it is the favourite species for intercropping with coffee. A trial established in Londrina County, Paraná state, aimed to compare growth performance in relation to different provenances of G. robusta. Among the tested provenances, there were four of them provided by CSIRO’s Division of Forestry and Forest Products and one provided by a local source, from Cianorte County, provided by Paraná State Environmental Institute. Ten years after field planting, wood volume produced by Australian provenances were 68.5%, 61.2%, 50.6% and 39.7% higher than that of the local seed source (respectively Boyd, Woodenbong, Wivenhoe and Emu Vale provenances). Wivenhoe provenance attained the highest height growth and Boyd provenance the best growth in diameter and volume. This suggests that productivity growth can be achieved by seed source replace.Keywords: Grevillea robusta; provenance trial; tree plantings.

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Umashankar, N., P. Venkateshamurthy, R. Krishnamurthy, H. R. Raveendra, and K. M. SatishI. "Effect of Microbial Inoculants on the Growth of Silver Oak (Grevillea robusta) in Nursery Condition." International Journal of Environmental Science and Development, 2012, 72–76. http://dx.doi.org/10.7763/ijesd.2012.v3.190.

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Owino, Jesse Omondi, Alice Adongo Onyango, Peter Murithi Angaine, and Shadrack Kinyua Inoti. "Effect of Soil Mixtures on Early Growth Performance of Grevillea robusta and Cupressus lusitanica Seedlings in the Highlands of Kenya." International Journal of Plant & Soil Science, August 11, 2022, 597–609. http://dx.doi.org/10.9734/ijpss/2022/v34i2231413.

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Seedling production nurseries have been receiving much attention because of increasing demand for seedlings. In sub-Saharan Africa studies have showed over 50% of smallholder seedlings planted were sourced in tree nurseries. This has caused a rise in need to improve quality of seedlings especially focused on production level. The focus on most studies on early growth performance of selected key species important either for commercial plantation or agroforestry has been varied on length of the study periods and measurement parameters, with the focus never being to compare the farmer practices with the industry. This study main objective is to determine the effect of growing media on early growth performance of Grevillea robusta and Cupressus lusitanica seedlings in the highlands of Kenya. These species from literature have shown abundance in terms of demand and availability in smallholder tree nurseries and received complaints on varied performance. The parameters under observation were height, branch numbers, leaf numbers and survival of the seedlings of these species over a six-month period. There were 13 treatments which included various soil mixtures as follows: Agricultural soil (A), Forest soil (FS), Farmyard Manure (FYM), and Sand (S) and their combinations. The study employed a Completely Randomized Design with total of 390 seedlings per species. The performance showed that the soil mixture with the combined mean cumulative highest survival was FS 78±3.2% and combined mean lowest cumulative survival was A+S+FYM (37±4.2%). Cupressus lusitanica performed better in survival (70±1.2%), height (171±8.1mm), branch numbers (25±1.1), and leaf numbers (119±12.1), when compared to Grevillea robusta survival (38±1.6%), height (57±4.0mm), branch numbers (2±0.2), and leaf numbers (13±1.1%) in the nursery. Different soil mixtures had performed differently for each of the parameters in the study with key observation was FS+FYM+S was the best performing for C. lusitanica height, branching, leaf numbers and survival. The study also observed FS was best performing for the survival of G. robusta in the nursery. This study demonstrates that seedlings in the nursery for these two species require different soil mixtures to ensure survival and high growth performance.

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Hashish, Khaled, Azza Mazhar, Hagar Abdel-Magied, محمد عبد الخالق الخطيب, and Salwa sakr. "Effect of some mineral nutrients on vegetative growth, chemical constituents, and anatomical structure of Grevillea robusta seedlings." Egyptian Journal of Chemistry, December 1, 2022, 0. http://dx.doi.org/10.21608/ejchem.2022.168821.7088.

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MUTHUKUMAR, A., SANDHYA G M., MAMATHA N., and DAKSHAYINI G. "ARBUSCULAR MYCORRHIZAL FUNGI INOCULATION PROMOTES GROWTH OF VEGETATION IN REFUSE DUMP SOILS OF OPEN CAST MINE FIELD." Asian Journal of Microbiology, Biotechnology and Environmental Sciences, March 15, 2022, 58–66. http://dx.doi.org/10.53550/ajmbes.2022.v24i01.011.

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Removal of soil from natural forest during open cast mining operation leads to severe disturbances not only to the local ecosystem also to livability of people. Reforestation is becoming a challenging task in post-open cast mine land as trees struggle to survive in refuse mine dump soils. Use of Arbuscular Mycorrhizal (AM) fungi can increase vegetation growth in disturbed soils. A study was conducted at refuse dump soils of Ballari, India. The objective was to investigate the effect of AM fungi in vegetation growth in the refuse dump soils. Twenty species were selected based on their ecological values viz., medicinal properties, firewood, fruits and shelter for birds etc. The saplings were inoculated with native AM fungi and maintained under nursery conditions for twelve months. The seedlings were observed for their growth characters by measuring height and collar diameter at regular intervals of every 3rd, 6th and 12th month. AM inoculated seedlings showed a greater increase in height than the control or non-inoculated seedlings. The increase in growth was three times in Syzygiumcumini, Thespesiapopulnea, Grevillearobusta and Holoptelaintegrifolia and two times in Mangiferaindica, Cordiaoblique, Tectonagrandis, Swieteniamahogany, Azadirachtaindica, Ficusbenghalensis, Ficusreligiosa and Phyllanthusemblica. Enhancement of collar diameter was three times in Thespesia populnea, A. indica, Ficus benghalensis, Ficus religiosa, Syzygiumcumini, Holoptela integrifolia and Grevillea robusta. The observation on establishment and survival rate of transplanted species like Tamarindus indica, Butea monosperma, Phyllanthus emblica and Cordia obliquato the main field was better when compared to other species. The study thus indicates the need and beneficial effect of AM fungi as growth promoters for tree species in refuse dump soils of opencast coal mine land.

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Siyum, Gebru Eyasu, Tuemay Tassew, and Abadi Gidey. "Effect of Different Moisture Harvesting Techniques on Seedling Survivals and Growth of Trees in Degraded Lands of Southern Tigray." Asian Journal of Research in Agriculture and Forestry, August 22, 2019, 1–10. http://dx.doi.org/10.9734/ajraf/2019/v4i130053.

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Tree planting on degraded lands play a key role in forest rehabilitation processes through afforestation and/or reforestation. Moisture harvesting structures (MHSs) has significant impact on seedling survivals at degraded lands. The objectives of this study were to investigate the impact of water harvesting techniques on seedling survival and growth performance of trees. Field experiments were conducted for two rainy seasons in southern Tigray, Atsela watershed. The experimental design followed was the split plot design. The MHSs as main plot used were eye-brow basins (EBs), micro trench (MTs), improved pit (IPs) and as control normal pit (NPs). The tree species grown as subplots were Eucalyptus camaldulensis, Grevillea robusta, Olea europaea and Cupressus lusitanica. The four tree species were planted by using seedlings. The tree survival rate, height, crown width (CW) and root collar diameter (RCD) of the four tree species were measured every six months after transplanting. The result shows that MHSs were significant in tree seedling height, CW and RCD but not in tree survival rate. Tree seedling height and CW grown in EBs were significantly higher than those grown in MTs, IPs and NP (P≤0.05). RCD of tree seedling was higher when grown in EBs than NP (control) (P≤0.05). The interaction of tree species seedlings and MHSs shows that those seedlings grown on MHSs were significantly thicker, taller and more survived than those grown on the NPs (control) (P≤0.05). So based on the experiments, it is concluded that MHSs particularly the eyebrow basin was considered as the most appropriate planting pit. Therefore, further demonstration of eyebrow basin tree planting should be carried out.

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Journal articles on the topic 'Grevillea robusta Growth'

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