Data/hora: 04/06/2024 19:00:53

Provedor de dados: | 90
País: | Brazil
Título: | Impacts of different management systems on the physical quality of an Amazonian Oxisol
Autores: | Guedes,Elaine Maria Silva; Fernandes,Antonio Rodrigues; Lima,Herdjania Veras de; Serra,Ademar Pereira; Costa,José Ribamar; Guedes,Rafael da Silva.
Data: | 2012-08-01
Ano: | 2012
Palavras-chave: | Conventional tillage; No-tillage; S Index.
Resumo: | The physical quality of Amazonian soils is relatively unexplored, due to the unique characteristics of these soils. The index of soil physical quality is a widely accepted measure of the structural quality of soils and has been used to specify the structural quality of some tropical soils, as for example of the Cerrado ecoregion of Brazil. The research objective was to evaluate the physical quality index of an Amazonian dystrophic Oxisol under different management systems. Soils under five managements were sampled in Paragominas, State of Pará: 1) a 20-year-old second-growth forest (Forest); 2) Brachiaria sp pasture; 3) four years of no-tillage (NT4.); 4) eight years of no-tillage (NT8); and 5) two years of conventional tillage (CT2). The soil samples were evaluated for bulk density, macro and microporosity and for soil water retention. The physical quality index of the samples was calculated and the resulting value correlated with soil organic matter, bulk density and porosity. The surface layers of all systems were more compacted than those of the forest. The physical quality of the soil was best represented by the relations of the S index to bulk density and soil organic matter.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000400021
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/S0100-06832012000400021
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.36 n.4 2012
Fonte: | info:eu-repo/semantics/openAccess