Nutrient accumulation in Eucalyptus bark at different population densities

Martins, Thales Guilherme Vaz; Rocha, Maria Fernanda Vieira; Nieri, Érick Martins; Melo, Lucas Amaral de; Silva, Maria L. de S.; Silva, Diana S. N. da

doi:10.1590/1807-1929/agriambi.v23n1p40-46

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…Rocha et al (2018) evaluated the effect of different plant spacings on bark thickness and properties in Eucalyptus grandis × E. camaldulensis and reported that plant spacing positively affects bark properties. Martins et al (2019) have quantified the macronutrients of 12-year-old Eucalyptus bark planted at three planting densities, concluding that higher plant density contributed to higher bark production and greater nutrient accumulation per area.…”

Section: Introductionmentioning

confidence: 99%

Effect of stand density on longitudinal variation of wood and bark growth in fast-growing Eucalyptus plantations

Ramalho¹,

Pimenta²,

Goulart³

et al. 2019

iForest

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The influence of tree spacing on the wood/bark ratio is unknown in young fastgrowing Eucalyptus trees. The objective of this study was to evaluate the effect of plant spacing on the wood and bark production along the Eucalyptus stem. Four genetic materials were planted in four spacings: 3×1 m, 3×2 m, 3×3 m and 3×4 m. Three 5-year-old trees from each clone and in each plant spacing were harvested. Cross-sectional discs (thickness: 30 mm) were cut from each tree along the stem (0%, 25%, 50%, 75% and 100% of the total tree height) and at 1.3 m above ground, totaling 288 disks (4 spacings × 4 clones × 3 replicates × 6 axial positions). The wood thickness was measured at six random and equidistant points around the perimeter using a gauge and means were calculated from each disc. Six cross diameters were measured for each debarked disc. After obtaining the averaged bark thickness and wood diameter, the bark content was calculated as the ratio between the surface area occupied by the bark and the total area of the stem in each level. In the narrowed plant spacing (3×1), the trees had a mean diameter of 7.4 cm, while at the spacing 3×4 the diameter of the trees was 91% higher (14.11 cm) at breast height. The increase in plant spacing from 3 to 12 m 2 per tree resulted in an increase in bark thickness (56.7%) from 1.94 mm to 3.04 mm, but caused a reduction of bark content (16%) from 9.66% to 8.11%. Our findings show that trees grown under wider spacing tend to produce thicker bark. The bark thickness and the effect of plant spacing on the bark thickness decreased in the base-top direction. The correlation between bark thickness and wood diameter increases from 0.682 to 0.825 with the increase of spacing between trees. In contrast, the bark thickness to bark content correlation decrease from 0.735 to 0.15 with increased plant spacing. The stand density significantly affected the variation of the stem diameter, bark thickness and bark content of Eucalyptus plantations.

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Section: Introductionmentioning

confidence: 99%

Effect of stand density on longitudinal variation of wood and bark growth in fast-growing Eucalyptus plantations

Ramalho¹,

Pimenta²,

Goulart³

et al. 2019

iForest

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“…Despite representing 8% of tree biomass and containing significant amount of nutrients, such as N, P and K (Martins et al . 2019), only 7% of tree bark returns to ecosystem via natural soil fertilizer, and less than 1% is reused as raw material for other agricultural purposes (IBÁ 2020). The same occurs for spent mushroom compound that is also rich in N, P and K (Meng et al .…”

Section: Resultsmentioning

confidence: 99%

Organic residues from agricultural and forest companies in Brazil as useful substrates for cultivation of the edible mushroom Pleurotus ostreatus

Viriato

Mäkelä

Kowalczyk

et al. 2021

Letters Applied Microbiology

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We investigated whether highly available organic residues in Brazil can be used as substrates for the production of the oyster mushroom Pleurotus ostreatus, instead of the conventional cultivation using the eucalyptus sawdust substrate. We assessed the mushroom yield on 13 substrates, of which 12 were formulated with different concentrations of organic residues and one with pure eucalyptus sawdust, and verified whether the raw material used in the substrate formula and the concentration of such alternative residues influenced their biological efficiencies. Substrates containing eucalyptus bark resulted in higher mushroom yield than those containing eucalyptus sawdust, which generally resulted in similar mushroom yield to the remaining formulas. Moreover, the raw material and the concentration of each residue affected the biological efficiency of the substrates. We show that the conventional substrate for P. ostreatus can be replaced by substrates easily accessible to producers without loss in productivity. Furthermore, that the concentration of these mixtures affects the mushroom productivity and should be considered when formulating the growth medium.

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“…Diferentemente disso, para Martins et al (2019), o menor espaçamento entre plantas resultou no aumento da competição intraespecífica entre clones de eucalipto, com menor acumulação nutricional e alterações na partição da biomassa. No entanto, evidências mostraram que dependendo do clone, a produção de biomassa, especialmente de casca, é diferenciada em densidades maiores, com menor acúmulo nutricional, indicando maior eficiência nutricional.…”

Section: Discussionunclassified

Eficiência De Utilização De Nutrientes Pelo Eucalipto Em Sistema Agrossilvipastoril

Araújo

Wink

Lange

et al. 2020

NAT

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O objetivo do estudo foi avaliar o efeito das configurações de plantio do sistema agrossilvipastoril sobre a eficiência de utilização de nutrientes nos diferentes compartimentos da biomassa do eucalipto. A EUN foi obtida pela razão entre o estoque da biomassa e dos nutrientes, avaliada pela média, desvio padrão (DP) e coeficiente de variação (CV) e pelo teste de Kruskal-Wallis com comparação entre arranjos pelo teste de Dunn (5% de probabilidade). A média de EUN dos macronutrientes variou de 49,40 a 3.257 kg kg-1 (DP: 2,78 a 528,19 e CV: 2,08 a 33,44%) e de 30.376,00 a 192.125 kg kg-1 para os micronutrientes (DP: 1,32 a 23.336,50 e CV: 0,004 a 28,41%). A magnitude decrescente da EUN da biomassa total foi P> S> K> Mg> N> Ca, na biomassa residual foi de S> P> Mg> K> Ca> N, nos galhos grossos foi de S> P> Mg> K> N> Ca, e na madeira e casca foi de P> S> K> Mg> N> Ca. Portanto, apesar de não se observar o padrão típico de aumento da EUN com o aumento da densidade de árvores nas faixas de cultivo do ILPF, o sistema agrossilvipastoril influenciou na variabilidade da EUN, sendo que variações desse padrão podem ocorrer, dependendo do compartimento da biomassa e do nutriente avaliado.Palavras-chave: ILPF; EUN; biomassa. NUTRIENT USE EFFICIENCY OF EUCALYPTUS IN CROP-LIVESTOK-FOREST SYSTEM ABSTRACT: The aim of the study was to evaluate the effect of the agrosilvipastoral system planting configuration on the nutrient use efficiency (NUE) of the different compartiments of eucalyptus biomass. The NUE was obtained by the ratio between biomass and nutrient stock, evaluated by the mean, standard deviation (SD) and coefficient of variation (CV) and by the Kruskall-Wallis test, at a 5% probability level with the evaluated weights by Dunn’s test. The EUN mean of the macronutrients ranged from 49 to 3.250 (SD: 2,95 to 4.258,72 and CV: 2,08 a 26,20%) and from 30.370 to 192.124 for micronutrientes (SD: 1,32 to 63.432,41 and CV: 0,02 to 20,14%). The decreasing magnitude of the NUE for the total biomass was P> S> K> Mg> N> Ca, for the residual biomass was S> P> Mg> K> Ca> N, for thick branches was S> P> Mg> K> N> Ca, and for the wood and the bark, was P> S> K> Mg> N> Ca.Therefore, although the typical pattern of EUN increase with increasing tree density in the CLF cultivation bands is not observed the agrosilvipastoral system influenced the variability of the EUN, and variations of this pattern may occur, depending on the biomass compartiment and the evaluated nutrient.Keywords: CLF System; NUE; biomass.

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Nutrient accumulation in Eucalyptus bark at different population densities

Cited by 5 publications

References 16 publications

Effect of stand density on longitudinal variation of wood and bark growth in fast-growing Eucalyptus plantations

Effect of stand density on longitudinal variation of wood and bark growth in fast-growing Eucalyptus plantations

Organic residues from agricultural and forest companies in Brazil as useful substrates for cultivation of the edible mushroom Pleurotus ostreatus

Eficiência De Utilização De Nutrientes Pelo Eucalipto Em Sistema Agrossilvipastoril

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