Biomass and Stock of Nutrients in Different Genotypes of Eucalypts in Southern Brazil

Santos, Kristiana Fiorentin dos; Schumacher, Mauro Valdir; Ludvichak, Aline Aparecida; Araújo, Elias Frank de

doi:10.9734/jeai/2019/v34i430178

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…However, considering only the stemwood component of the trees, since this is the component of main commercial interest in the stands, the NUE decreased in the following order: phosphor > magnesium > sulfur > calcium > nitrogen > potassium for sandy and clayey soil. Similar results, although with inversion in the distribution of some nutrients, were reported by Santos et al (2019b) studying the nutritional efficiency of different eucalyptus genotypes in Southern Brazil (P > S > Mg > Ca > N > K).…”

Section: Nutrient-use Efficiencysupporting

confidence: 87%

Removal of nutrients due to biomass harvest of Eucalyptus urograndis in different soils: macronutrients

Salvador¹,

Ludvichak²,

Momolli³

et al. 2021

Rev. ambiente água

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Intensive management of forest stands can increase biomass production, as well as increase the removal of nutrients from the site. This study therefore sought to simulate different harvest intensities and to calculate the nutrient-use efficiency of Eucalyptus urograndis in different types of soil. The study was carried out in a plantation of seven-year-old hybrid E. urograndis in the city of Telêmaco Borba, Paraná, Brazil. The study site included two sub areas with sandy soil and clayey soil (Cambisols Inceptisol and Ferralsols Oxisols, respectively). Using biomass and nutrients stock data, nutrient removal was simulated under five different harvest scenarios. Nutrient-use efficiency was obtained from the relation between the amount of biomass and nutrients of each tree component. Harvesting the whole tree resulted in the removal of approximately 61% of the nutrients from the site in sandy soil, while in clayey soil 57% of the nutrients were removed. With harvesting of only the commercial stemwood, only 22% of the nutrients were removed from the sandy soil, and 21% from the clayey soil. Stemwood was the component that had the highest nutrient-use efficiency values for all the analyzed nutrients. In conclusion, to achieve nutritional sustainability of E. urograndis stands, the best harvesting system involves the removal of only commercial stemwood. For the production of stemwood, sandy soils have a greater biological efficiency of calcium and magnesium when compared to clayey soil.

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Section: Nutrient-use Efficiencysupporting

confidence: 87%

Removal of nutrients due to biomass harvest of Eucalyptus urograndis in different soils: macronutrients

Salvador¹,

Ludvichak²,

Momolli³

et al. 2021

Rev. ambiente água

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“…Contudo, ainda são necessários estudos para avaliar a sustentabilidade dos fatores de crescimento, água, luz e nutrientes no manejo dessas plantações. Por exemplo, Santos et al (2019) reportaram que a concentração de alocação de nutrientes, bem como biomassa, pode variar nos diferentes genótipos de eucalipto, mesmo em condições edafoclimáticas semelhantes.…”

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Produção de biomassa de <i>Eucalyptus grandis</i> Hill ex. Maiden em diferentes arranjos de espaçamentos de plantio simples e duplos

Machado

Eufrade-Junior

Spada³

et al. 2019

Ciênc. Florest.

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ResumoO objetivo deste trabalho foi avaliar o efeito dos espaçamentos de plantio em linhas simples e duplas na área basal, volume de madeira com casca por hectare, densidade básica do tronco e biomassa arbórea de Eucalyptus grandis Hill ex Maiden (clone G-21) manejado no sistema de curta rotação. O ensaio foi composto por quatro espaçamentos de plantio: 3,0 m × 1,0 m × 2,0 m (linha dupla), 3,0 m × 1,0 m (linha simples), 3,0 m × 1,0 m × 1,0 m (linha dupla) e 3,0 m × 0,5 m (linha simples), sendo avaliado aos 12 meses e 24 meses após o plantio. As principais diferenças significativas foram encontradas no segundo período de avaliação para os fatores de variação considerados -espaçamento e idade. A área basal aumentou com o adensamento das florestas, embora o volume não tenha seguido a mesma tendência aos 24 meses de plantio. A densidade básica aumentou com a idade apenas nos espaçamentos simples. No estudo da alocação de biomassa nos diferentes compartimentos da árvore, verificou-se uma maior proporção de biomassa de tronco com a idade, bem como nos espaçamentos mais adensados. Uma das maiores produções florestais (65 Mg ha -1 ) foi encontrada no espaçamento 3,0 m × 1,0 m aos 24 meses de idade. AbstractThe objective of this work was to analyze the effect of single and double planting spacing on the basal area, stem wood and bark volume per hectare, stem basic density and above-ground biomass of Eucalyptus grandis Hill ex Maiden (G-21 clone) managed under the short rotation coppice system. Four planting spacings were considered: 3.0 m × 1.0 m × 2.0 m (double row), 3.0 m × 1.0 m (single row), 3.0 m × 1.0 m × 1.0 m (double row) and 3.0 m × 0.5 m (single row), which were evaluated at 12 months and at 24 months after planting. Main significant differences were found at 12 months after planting for both factors spacing and age. Basal area increased as planting densification, although the volume did not show the same trend at 24 months after planting. Basic density increased as age only at single rows. In the study of the biomass allocation in the different tree compartments, it was verified a higher proportion of stem biomass on older treatments and denser spacings. One of the highest forest productions (65 Mg ha -1 ) was found in the 3 m × 1 m planting spacing at 24 months of age.

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Above-Ground Biomass and Nutrient Accumulation in Ten Eucalyptus Clones in Leizhou Peninsula, Southern China

Zhang

Cui

Liu

et al. 2022

Forests

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Selecting suitable clones and regulating nutrients for Eucalyptus plantation are a key management practice for improving productivity and nutrient use. Therefore, this study evaluated growth performance, above-ground biomass, nutrient content (nitrogen, phosphorus, potassium, calcium, and magnesium) and nutrient use efficiency (NUE) of ten Eucalyptus Clones for three sites in Leizhou Peninsula. The present study showed a significant genetic variation among clones in growth parameters. Organs have different characteristics in biomass and nutrient content. Stemwood had the highest biomass but lowest total nutrient concentration. While, the stembark exhibited high contents of nutrients and biomass. On average, the NUE of clones was in the following order: phosphorus > magnesium > nitrogen > potassium > calcium. Taken together, among ten clones tested, clones LH1-9211, TH9224, DH32-13, M1 and DH32-22 showed consistently growth and production performance, as well, their NUE were superior in ten clones. Maximum amount of biomass was allocated to economically harvestable component (stemwood) and nutrients in non-harvestable components (stembark and foliage). While nutrients are removed from the planting area as part of the harvest, we can calculate nutrients loss by NUE and biomass. These findings provided useful insights for selection of Eucalyptus Clones and regulating nutrient export during the harvest of Eucalyptus Clones from a planted forest system.

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Biomass and Stock of Nutrients in Different Genotypes of Eucalypts in Southern Brazil

Cited by 3 publications

References 20 publications

Removal of nutrients due to biomass harvest of Eucalyptus urograndis in different soils: macronutrients

Removal of nutrients due to biomass harvest of Eucalyptus urograndis in different soils: macronutrients

Produção de biomassa de <i>Eucalyptus grandis</i> Hill ex. Maiden em diferentes arranjos de espaçamentos de plantio simples e duplos

Above-Ground Biomass and Nutrient Accumulation in Ten Eucalyptus Clones in Leizhou Peninsula, Southern China

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