Biomass production and nutrient content in different Eucalyptus genotypes in Pampa Gaúcho, Brazil

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

doi:10.5039/agraria.v14i4a6575

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…Therefore, when removing the trunk, debarking of the trees in the stands should be carried out to reduce the export of Ca. In this way, soils with lower concentrations of this nutrient could have their productivity preserved for a longer period (Santos et al, 2019a). Whole tree: harvest of whole biomass tree; Full tree: harvest above ground biomass; Stem: harvest of stemwood with stembark; SW+SB: commercial stemwood with stembark; SW: commercial stemwood.…”

Section: Harvest Simulation Based On Different Harvesting Intensitiesmentioning

confidence: 99%

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: Harvest Simulation Based On Different Harvesting Intensitiesmentioning

confidence: 99%

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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“…Hybrid eucalyptus trees were developed as a strategy to improve growth, productivity, pest and disease resistance, and wood properties (Rezende et al 2014). The hybrid of E. grandis and E. urophylla is commonly called urograndis, and it has been grown in many countries, including Brazil (dos Santos et al 2019), the Democratic Republic of the Congo (Bouvet et al 2009), South Africa (Retief and Stanger 2009), southern China (Wu et al 2011), and Indonesia (Mindawati et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Non-destructive modeling using a drilling resistance tool to predict wood basic density of standing trees in a eucalypts plantation in North Sumatra, Indonesia

et al. 2023

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Abstract. Singh KP, Siregar IZ, Abad JIM, Karlinasari L. 2022. Non-destructive modeling using a drilling resistance tool to predict wood basic density of standing trees in a eucalypts plantation in North Sumatra, Indonesia. Biodiversitas 23: 6218-6226. Eucalypts are globally selected as the main tree species for pulp and paper industries owing to their good potential growth and wood traits. Wood basic density, which is related to wood biomass yield, is one of the most important wood traits for pulp production and has become a focus in the tree improvement program. Evaluation of this trait in the field is needed to efficiently develop tree improvement programs. The aims of this study were to determine the distribution of basic density in the vertical direction of standing trees, including Eucalyptus grandis, Eucalyptus urophylla, and E. grandis × E. urophylla hybrid (commonly called “urograndis”), and to develop a model for predicting wood basic density using micro-drilling resistance tools of ResistographÒ. The results showed that basic density traits varied within individual trees and within and between species. Average whole tree basic wood densities of 379.9 kg/m3, 400.5 kg/m3, and 440.6 kg/m3 were found for E. grandis, hybrid urograndis, and E. urophylla at 44 months old, respectively. The model developed had a good correlation for predicting wood basic density at 1.3 m height and whole tree basic density, with the R2 for model calibration ranging from 0.52 to 0.76 for 1.3 m wood basic density prediction and from 0.62 to 0.79 for whole tree wood basic density. This study found that the three species of eucalyptus could be used to create a combined model for predicting wood basic density that could be used for each individual species. The model for single and multiple species had a good validation with R2 from 0.51 to 0.72.

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Nutrient-use efficiency of Eucalyptus genotypes grown in Luvisol

Santos¹,

Queiroz²,

Ludvichak³

et al. 2021

Rev. ambiente água

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Superior productivity of genotypes in forest plantations depends on the supply, capture and use-efficiency of resources. In this context, knowledge regarding the nutritional efficiency of Eucalyptus influences farmers and researchers in decision-making and in the management of forest ecosystems. The aim of this research was to estimate nutrient-use efficiency in Eucalyptus genotypes planted in the state of Rio Grande do Sul, Brazil. We evaluated six potential genotypes at 43-month-old stands. Nutrient-use efficiency was calculated using the ratio of biomass and the amount of nutrients for each component of the biomass. Results here presented confirmed that there is synergism and antagonism between nutrients at the shoot level in the Eucalyptus genotypes. For stemwood, E. saligna showed the best utilization efficiency of N, P, K, S, and Mn; and E. urophylla × E. globulus for Mg, B, and Zn. Metabolic pathways control the production of biomass synthesized by each genotype and the differences between genotypes groups were on the basis of their nutrient-use efficiency in the biomass components. Stemwood was the component that showed the highest nutrient-use efficiency, while leaves presented the lowest nutrient-use efficiency. Additionally, our analyses identified how different each Eucalyptus genotype is and these traits may be used for clone allocation according to soil fertility.

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Biomass production and nutrient content in different Eucalyptus genotypes in Pampa Gaúcho, Brazil

Cited by 3 publications

References 11 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

Non-destructive modeling using a drilling resistance tool to predict wood basic density of standing trees in a eucalypts plantation in North Sumatra, Indonesia

Nutrient-use efficiency of Eucalyptus genotypes grown in Luvisol

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