Consulta: creatorFacets:"Comerford,Nicholas Brian"
Registros recuperados: 3
Data/hora: 16/06/2024 17:00:00

Biomass and nutrient cycling in pure and mixed stands of native tree species in southeastern Bahia, Brazil
Provedor de dados: 90
Autores: Gama-Rodrigues,Antonio Carlos da; Barros,Nairam Félix de; Comerford,Nicholas Brian.
The objective of this paper is to study selected components of the nutrient cycle of pure and mixed stands of native forest species of Atlantic Forest in southeastern Brazil. Tree diameter, height, above-ground biomass, and nutrient content were determined in 22-year-old stands. Litterfall, litter decomposition, and nutrient concentration were evaluated from August 1994 to July 1995. The following species were studied: Peltogyne angustiflora, Centrolobium robustum, Arapatiella psilophylla, Sclerolobium chrysophyllum, Cordia trichotoma, Macrolobium latifolium. The litter of a natural forest and a 40-year-old naturally regenerated second-growth forest was sampled as well. The mixed-species outmatched pure stands in height, stem volume and total biomass (29.4...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tropical forests; Forest litter; Soil fertility.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832007000200011

Alocação de nutrientes em plantios de eucalipto no Brasil
Provedor de dados: 90
Autores: Santana,Reynaldo Campos; Barros,Nairam Félix de; Novais,Roberto Ferreira; Leite,Hélio Garcia; Comerford,Nicholas Brian.
Práticas de manejo florestal podem alterar a exportação de nutrientes do sítio. Este trabalho teve por objetivo estimar o conteúdo de nutrientes em árvores de eucalipto, em diferentes regiões do Brasil. Avaliou-se a influência de algumas características climáticas na produção e no conteúdo de nutrientes na biomassa, utilizando-se o banco de dados do Programa de Pesquisa em Solos e Nutrição de Eucalipto do Departamento de Solos - UFV. As características climáticas foram um importante componente dos modelos. A produção de biomassa e o conteúdo de nutrientes foram positivamente relacionados entre si e ambos foram menores nas regiões com menor disponibilidade de água. As estimativas apontaram que até à idade de 4,5 anos pós-plantio acumulam-se as maiores...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nutrição florestal; Biomassa; Macronutrientes.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000700016

Influence of soil pH on inorganic phosphorus sorption and desorption in a humid brazilian Ultisol
Provedor de dados: 90
Autores: Sato,Shinjiro; Comerford,Nicholas Brian.
Liming is a common practice to raise soil pH and increase phosphorus (P) bioavailability in tropical regions. However, reports on the effect of liming on P sorption and bioavailability are controversial. The process of phosphorus desorption is more important than P sorption for defining P bioavailability. However few studies on the relationship between soil pH and P desorption are available, and even fewer in the tropical soils. The effects of soil pH on P sorption and desorption in an Ultisol from Bahia, Brazil, were investigated in this study. Phosphorus sorption decreased by up to 21 and 34 % with pH increases from 4.7 to 5.9 and 7.0, respectively. Decreasing Langmuir K parameter and decreasing partition coefficients (Kd) with increasing pH supported...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Liming; Phosphorus bioavailability; Langmuir; Partition coefficients; Atlantic Forest.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832005000500004