Biomassa e nutrientes removidos no primeiro desbaste de um povoamento de Pinus taeda L. em Cambará do Sul, RS

Viera, Márcio; Schumacher, Mauro Valdir; Bonacina, Darlan Michel

doi:10.1590/s0100-67622011000300001

Cited by 10 publications

(10 citation statements)

References 5 publications

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“…Já em relação às raízes, à casca e aos galhos ocorrem oscilações da participação desses compartimentos da biomassa ao longo das idades, não se evidenciando uniformidade, embora seja percebida a tendência de diminuição de suas participações com o crescimento do fuste. Valores semelhantes para os diferentes compartimentos foram observados por Sanquetta et al (2003), Watzlawick & Caldeira (2004), Vieira et al (2011) e Witschoreck (2008), quando feita a comparação com idades semelhantes a esse trabalho. Rondon (2002) observou que a biomassa aérea das árvores se concentra principalmente na porção tronco.…”

Section: Distribuição Da Biomassa Em Compartimentosunclassified

Modelagem do crescimento e de biomassa individual de Pinus

Schikowski¹,

Corte²,

Sanquetta³

2013

Pesq. Flor. Bras.

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Este estudo tem como objetivo testar modelos matemáticos para estimativas de biomassa de diferentes compartimentos de Pinus spp., a partir de variáveis de fácil mensuração. Os dados utilizados são provenientes de plantios localizados no centro sul do estado do Paraná. Foram utilizados dados de peso seco total e parcial de 35 árvores de Pinus spp., obtidos por meio do método destrutivo direto. De cada árvore amostrada foram medidos também o CAP (circunferência à altura do peito) e a altura total. Os modelos para estimativa de biomassa de folhagem não apresentaram bom desempenho, verificado pelos indicadores de ajuste. Entretanto, para os compartimentos: galhos, raízes, casca, fuste e para biomassa total, os ajustes apresentaram elevados valores de R² e baixos valores de Syx%. O modelo de crescimento de Richards obteve melhor desempenho que os demais testados para a estimativa da biomassa total

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Section: Distribuição Da Biomassa Em Compartimentosunclassified

Modelagem do crescimento e de biomassa individual de Pinus

Schikowski¹,

Corte²,

Sanquetta³

2013

Pesq. Flor. Bras.

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“…Nonetheless, although stem and bark represented most of the tree biomass, the concentration of macronutrients in these components was lower (Table 4). Merino et al (2005), Viera et al (2011) and Salvador et al (2016), studying forest essences, also reported that the leaves presented the highest levels of macronutrients, constituting an important return route of the mineral elements from the vegetation to the soil.…”

Section: Discussionmentioning

confidence: 96%

“…In spite of the fact that several studies have been carried out on biomass and nutrient exports in homogenous stands of Pinus (VIERA et al, 2011;SIXEL et al, 2015;CORRÊA;BELLOTE, 2011;SCHUMACHER et al, 2013;LIMA et al, 2016), no records have been found in up-to-date literature on studies of mixed plantings of species of the same genus. Therefore, the objective of this study was to quantify the biomass and nutrients of the aerial part of trees and to evaluate the effect of harvest residues management on the removal of nutrients from pure and mixed plantations of Pinus sp..…”

Section: Introductionmentioning

confidence: 99%

BIOMASS AND NUTRIENTS REMOVAL IN PURE AND MIXED POPULATIONS OF Pinus sp. IN SOUTHWEST BAHIA - BRAZIL

Gomes

Barreto-Garcia

Novaes³

et al. 2019

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The magnitude of export of nutrients with forest harvest depends on the adopted waste management and, above all, on the distribution of biomass and nutrients in the trees, which is conditioned by the genetic potential and the species composition of forest stand. The objective of this study was to quantify the biomass and nutrients of the trees and evaluate the effect of the management of harvest residues on the removal of nutrients from pure and mixed plantations of Pinus sp.. The study areas are located in the Southwest region of Bahia State, Brazil. Twenty trees per species were selected and felled under both planting conditions. The biomass quantification was performed by the destructive method. Samples of the tree components were analyzed for N, P, K, Ca and Mg contents. The total biomass was 75 Mg ha-1 for pure planting, and 81 Mg ha-1 for mixed planting, with wood and bark as the most representative compartments. Removal of the wood with bark led to too much nutrient removal, reaching a further 50% of the total contained in the biomass. Mixed planting has been shown more prone to export P, K and Mg. For both plantations, 64% of the N, P, K, Ca and Mg are in other components of the aerial part of the tree, and not in the wood. The elements that represent the highest risk for maintaining productivity are Ca and Mg.

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“…However, positive responses to fertilization were observed under different managements and in different environments (Muniz et al, 1975;Reissmann and Wisniewski, 2000;Ferreira et al, 2001;Moro et al, 2014;Coyle et al, 2016). Moreover, the nutrients exported by the crops must be replenished (Viera et al, 2011), which is a fundamental practice to reduce the environmental impact of any agricultural or forestry crop. Therefore, fertilizer recommendations have been developed in Brazil (Gonçalves, 1995;Vogel et al, 2005), and their effects on the plant physiology and resource use efficiency were evaluated (Campoe et al, 2013;Ward et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Tree Growth and Nutrient Dynamics in Pine Plantations in Southern Brazil

Filho

Schumacher

Neves

et al. 2017

Rev. Bras. Ciênc. Solo

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For the development of nutrient budget models to recommend lime and fertilizers for agricultural and forestry crops, curves of plant growth and nutrient accumulation are required. Information about how nutrients are partitioned between the different plant organs is also necessary, but still scarce for pine in Brazil. This study evaluated the growth, biomass partitioning, and nutrient dynamics in pine forests in southern Brazil. To this end, we assessed unthinned 2, 4, 6, and 8-year-old stands of Pinus taeda L. Three plots of 20 × 30 m per stand were delimited, in which three trees of different classes of diameter at breast height (DBH) were chosen. These trees were measured, felled, and the weight of their fresh components (leaves, branches, bark, and wood) was evaluated. Samples of each tree compartment and from the forest litter were taken to determine dry weight and nutrient content. From trees of the mean DBH class, the roots were also collected and the dry weight and nutrient contents determined. The same sampling procedure was carried out with soil for physical and chemical characterization. Regression models were adjusted to estimate growth, nutrient uptake, and nutrient use efficiency of pine trees, based on data collected in this and previous studies. The equations developed in this research can be used in nutrient budget models as well as in other simulation models, to establish recommendations of lime and fertilizers for Pinus taeda stands in southern Brazil.

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Biomassa e nutrientes removidos no primeiro desbaste de um povoamento de Pinus taeda L. em Cambará do Sul, RS

Cited by 10 publications

References 5 publications

Modelagem do crescimento e de biomassa individual de Pinus

Modelagem do crescimento e de biomassa individual de Pinus

BIOMASS AND NUTRIENTS REMOVAL IN PURE AND MIXED POPULATIONS OF Pinus sp. IN SOUTHWEST BAHIA - BRAZIL

Tree Growth and Nutrient Dynamics in Pine Plantations in Southern Brazil

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