Dynamics of eucalypt clones canopy and Brachiaria brizantha production in silvopastoral systems with different spatial arrangements

Oliveira, Carlos Henrique Rodrigues de; Reis, Geraldo Gonçalves dos; Reis, Maria G. F.; Leite, Hélio Garcia; Souza, Felippe Coelho de; Faria, Ronan Soares de; Oliveira, Fabrícia Benda de

doi:10.1007/s10457-015-9884-9

Cited by 6 publications

(8 citation statements)

References 42 publications

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“…The position of the E1 clone as related to the LAI was reduced from second to eighth at the age of 21 months, possibly due to leaves selfshading, which stimulated leaf abscission. It is likely that higher yield can be obtained for this clone if established at wider tree planting spatial arrangements, allowing a better distribution of the radiation incidence on the leaves throughout the canopy (Paula et al, 2013;Oliveira et al, 2016). As reported by Oliveira et al (2016) LAI decreased for most eucalypt clones studied with the increase in tree density.…”

Section: Discussionmentioning

confidence: 66%

“…LAI can be used to indicate the interception capacity of photosynthetically active radiation, which affects forest productivity (Lang and Mcmurtrie, 1992). The LAI varies with the genotype, plant age, environmental conditions and management methods, among others (Xavier et al, 2002;Lima, 2003;Chaves et al, 2007;Fontan, 2007;Oliveira et al, 2016). For example, in sites with adequate availability of nutrients and water in the soil, the LAI is higher than in sites with limited resources (Whitehead and Beadle, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Dieback, Leaf Area Index and Yield of Young Eucalypt Clones Plantation in the Brazilian Savannah Region

et al. 2018

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Eucalypt has been widely planted in Brazil, in the savannah region, which is characterized by high soil water deficit and low fertility. Dieback, leaf area index (LAI) and yield of young stands of 16 eucalypt clones were studied in Vazante, MG, Brazil (17º36’09"S and 46º 42’02"W). It was determined for each clone: a) the proportion of the tree height with dieback symptoms in the apical terminal (HWD%) and the proportion of trees with dieback (NWD%), at 13 months (end of the first dry season); b) the LAI at 13 and 21 months, and c) the yield at the age of 13, 19 and 25 months. HWD% reached 5-9%, and NWD%, 50-80%, for the five most susceptible clones, when the soil water deficit reached 508 mm in the year. LAI varied from 0.61 to 1.56, at 13 months, and from 2.31 to 3.48 at 21 months, presenting inverse relationship with dieback. The least susceptible clones to dieback achieved the highest yield up to 25 months of age. There was interaction between dieback and fertilizer levels only for three clones. There was a positive correlation (p < 0.001) between the LAI at the age of 13 months and the periodic monthly increment from 0 to 11 months, and from 11 to 19 months. The difference in dieback susceptibility among clones allows the selection of genotypes for regions where the soil water deficit is a major limiting factor.

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Section: Discussionmentioning

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Dieback, Leaf Area Index and Yield of Young Eucalypt Clones Plantation in the Brazilian Savannah Region

et al. 2018

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“…Variation in the tree spacing and spatial arrangement could lead to a higher yield and profi tability of the consortium since they modify the degree of intra-and inter-specifi c competition. The acquisition and use of the growth resources are modifi ed with both the tree spacing and its spatial distribution in the fi eld (Bernardo et al, 1998;Kruschewsky et al, 2007;Oliveira et al, 2013;Leite et al, 2014;Oliveira et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…In a consortium, there is a need to consider the yield of all components of the system. The increasing distance between rows favors the production of agricultural crops or pasture in the AGF`s (Prasad et al, 2010;Oliveira et al, 2016;Paciullo et al, 2011). The proximity of the trees within the row can accentuate the competition between them, mainly due to the rapid closure of the canopies and root occupancy (Melido, 2012;Kruschewsky et al, 2007;Oliveira et al, 2009;Oliveira et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Through the determination of the leaf area index (LAI), it is possible to estimate the transmittance of the photosynthetically active radiation (t%) in forest stands, helping to defi ne management techniques to maintain a high yield of trees and agricultural crops in an AGF. Usually, in the studies about the spatial arrangement of the tree component, only the tree growth and yield has been evaluated, although the agricultural crop yield should also be monitored (Dubè et al, 2002;Kruschewsky et al, 2007;Oliveira et al, 2009;Oliveira et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Growth, Yield and Economic Analysis of an Eucalypt-Soybean Consortium: Effect of the Distance Between Trees Within the Row1

Barbosa

Reis

et al. 2019

Rev. Árvore

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Agroforestry systems (AGF) design should benefit all components of the consortium. The objective of this study was to evaluate the effect of the distance between plants within the row on growth and yield of trees and agricultural crop and on the economic viability of the consortium. The eucalypt was planted in 9.5 x 1.5 m, 9.5 x 2.0 m, 9.5 x 3.0 m and 9.5 x 40 m arrangements, in consortium with soybean. The tree diameter (dbh) and total height (Ht), and the leaf area index (LAI) were measured at 14, 38 and 51 months. Soybean yield was evaluated 24 months after planting eucalypt. An economic evaluation of the consortium was carried out for a planning horizon of seven years. The distance between trees within the row did not affect the tree height, however, larger distances promoted a higher dbh and individual volume. Higher values of basal area and yield were achieved in the 9.5 x 1.5 m arrangement. The LAI was smaller (1.43) in the 9.5 x 4.0 m arrangement, at 38 months, compared to the other arrangements (mean LAI = 1.66). Soybean had it's highest yield (2,317 kg ha-1) in the 9.5 x 4.0 m arrangement. In the economic evaluation, the wood produced in the two denser arrangements was destined for energy, with low market value, making these two arrangements unfeasible economically, although the tree component yield was the highest in the arrangement 9.5 x 1.5 m. The 9.5 x 4.0 m spatial arrangement was the most economically viable, considering the allocation of 40% of the wood for sawing, and the prices and costs assumed in this study. In this arrangement, the soybean yield was the highest, and the planting costs were the lowest when compared to the other arrangements.

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Productivity estimate using regression and artificial neural networks in small familiar areas with agrosilvopastoral systems

et al. 2020

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Dynamics of eucalypt clones canopy and Brachiaria brizantha production in silvopastoral systems with different spatial arrangements

Cited by 6 publications

References 42 publications

Dieback, Leaf Area Index and Yield of Young Eucalypt Clones Plantation in the Brazilian Savannah Region

Dieback, Leaf Area Index and Yield of Young Eucalypt Clones Plantation in the Brazilian Savannah Region

Growth, Yield and Economic Analysis of an Eucalypt-Soybean Consortium: Effect of the Distance Between Trees Within the Row1

Productivity estimate using regression and artificial neural networks in small familiar areas with agrosilvopastoral systems

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