Effect of spacing on growth and biomass production of Gliricidia sepium (jacq) walp in an alley cropping system in Sierra Leone

Karim, Abdul Babatunde; Savill, P.

doi:10.1007/bf00119318

Cited by 20 publications

(14 citation statements)

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“…On the other hand, our results obtained for sabiá were similar to the findings of other authors, that increased planting densities increased biomass (RONDON et al, 2006). Karim and Savill (1991) observed that increased planting densities in gliricidia increased total biomass per unit area, thus differing from our observations. However, their objective was to evaluate initial growth in that species for alley cropping; they tested planting densities from 1,250 to 20,000 plants ha -1 .…”

Section: Methodscontrasting

confidence: 47%

Biomass of tree species as a response to planting density and interspecific competition

et al. 2014

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RESUMO -Planting trees is an important way to promote the recovery of degraded areas in the Caatinga region. Experiments (E1, E2, and E3) were conducted in a randomized blocks design, with three, three, and five replicates, respectively. The objectives were to evaluate biomass of the shoots of: a) gliricidia (G) and sabiá (S), as a response to planting density; b) G, S, and neem (N) in competition; c) G, and S in agroforestry. E1 was conducted in split-plots, and planting densities (400, 600, 800, 1000, and 1200 plants ha -1 ) as subplots. E2 consisted of a factorial comprising the following plots: GGG, NGN, SGS, NNN, GNG, SNS, SSS, GSG, NSN (each letter represents a row of plants). E3 was conducted with G and S in agroforestry experiment. The trees were harvested after 54, 42, and 27 months old, in E1, E2 and E3, respectively. In E1, G presented higher green biomass of the stems and leaf at smaller densities than S, but lower green biomass of branches at most densities. The species did not differ for mean stem dry biomass and leaf dry biomass, but G showed higher branch dry biomass at most densities. Higher planting densities increased green and dry biomass of stems, branches, and leaves in S, but decreased those characteristics in G, with the exception of leaf dry mass, which was not influenced by density. In E2, the behavior of each species was identical in plots containing the same or different species. Griricidia showed the highest green biomass of stems and branches, and the highest values for geren biomass of the leaf were observed for gliricidia and neem. The highest stem, branch, and leaf dry biomass values were obtained for G, S, and N, respectively. In E3, G was superior for stem and leaf green biomass, and for stem and branch dry biomass. There were no differences between species for the other biomass values. Palavras-chave: Azadirachta indica; Gliricidia sepium; Mimosa caesalpiniifolia. BIOMASSAS DE ESPÉCIES ARBÓREAS EM RESPOSTA A DENSIDADES DE PLANTIO E À COMPETIÇÃO INTERESPECÍFICA ABSTRACT -Existe interesse na recuperação de áreas degradadas da Caatinga com o plantio de árvores. Experimentos (E1, E2 e E3) foram realizados, em blocos ao acaso com três, três e cinco repetições, respectivamente, para avaliar as biomassas da parte aérea: a) da gliricidia (G) e sabiá (S), em resposta à densidade de plantio; b) da G, S e nim (N) em competição; e c) da G e S em experimento agroflorestal. E1 foi realizado com

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Section: Methodscontrasting

confidence: 47%

Biomass of tree species as a response to planting density and interspecific competition

et al. 2014

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“…Similar findings were reported by Karim and Savill (1991) in an agroforestry study of the effect of four betweenrow spacing (2, 4, 6 and 8 m) and 3 within-row spacings (0.25, 0.5 and 1 m) on biomass of Gliricidia sepium. They also found that closer between-row spacing increased biomass production per unit area, while closer within-row spacing reduced biomass production per plant.…”

Section: Effect Of Within-row Density On Above-ground Biomasssupporting

confidence: 75%

A study of water use in leucaena-grass systems

Pachas¹

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Leucaena [Leucaena leucocephala Lam. de Wit ssp. glabrata (Rose) Zarate] mixed with Rhodes grass (Chloris gayana Kunth), is widely grown in tropical northern Australia in a hedgerow silvopastoral system which is productive, profitable and sustainable for beef cattle production. However, there is poor understanding concerning the most appropriate tree densities and planting configurations for leucaena and grass forage systems. Limited studies have focused on above-ground interactions between the species with even fewer on below-ground competition. Therefore, the main objective of this thesis was to investigate above-and below-ground competition, with emphasis on water use of both the leucaena and grass at a range of leucaena densities. Additional objectives were to determine (a) the effect of plant density on above-ground interactions between the species; (b) spatial and temporal water use of both species; (c) rooting patterns and deep drainage in a commercial leucaena-grass pasture; and (d) the effect of defoliation on water use of leucaena.The following experiments were conducted to address these objectives, firstly a field monitoring experiment in a commercial leucaena-grass pasture system at north-east of Injune, Central Queensland; secondly, two experiments in a controlled glasshouse environment at the University of Queensland, St. Lucia Campus Brisbane; and thirdly, three field experiments at the University of Queensland, Gatton Campus, Gatton Australia.The detailed monitoring analysis, using high-technology soil water moisture sensors, provided water use information and highlighted that there was minimal spatial and temporal complementarity of water use between the species. This was contrary to the general agroforestry hypothesis that trees acquired water from different soil strata when grown in association with grass. A high level of competition for water was evident as most of the water extraction occurred in the top 1.5 m of the soil profile. In the second year, root activity and water extraction became shallower probably associated with overgrazing and severe pruning. Another important outcome of this experiment was the low level of deep drainage to 4 m.The effect of leucaena plant density on above and below-ground interactions was then investigated using a Nelder fan design established at Gatton research farm from

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“…The observed means were: 2.19; 1.05; 0.83 and 0.61kg plant -1 for the treatments of 10,000; 20,000; 30,000 and 40,000 plants ha -1 , respectively. This shows that although the lower plant spacing reduced the production of biomass per plant (KARIM & SAVILL, 1991), the largest number of plants per unit area probably outweighed it.…”

Section: Resultsmentioning

confidence: 93%

Dry matter yield and bromatological composition of gliricidia in different crop densities

et al. 2016

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Effect of spacing on growth and biomass production of Gliricidia sepium (jacq) walp in an alley cropping system in Sierra Leone

Cited by 20 publications

References 1 publication

Biomass of tree species as a response to planting density and interspecific competition

Biomass of tree species as a response to planting density and interspecific competition

A study of water use in leucaena-grass systems

Dry matter yield and bromatological composition of gliricidia in different crop densities

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