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(2000)

Consequences of transformation of native Cerrado in pasture land on the porosity of a clayey-sand red latosol

Luíz Carlos Balbino 1, 2, Ary Bruand 2, 3, Michel Brossard 1, M. F. Guimarães 4, P. Quétin 2

(2000)

In the Brazilian savannah (Cerrados area), about 60 % of the surface area is used as pasture land and 30 % of the latter is cultivated pasture. Many studies have reported that pastures degrade quickly and degradation would be more intense when the soil was tilled prior pasture sowing. Pasture degradation (decrease in the pasture quality and yield, weed invasion) would be partly a consequence of the soil structure evolution (Balbino & Di Stefano, 1999). Origin of pasture degradation is still under discussion and analysis of the literature showed that there is a lack of quantitative data. The aim of this study is to perform a detailed analysis of the porosity in a low productivity cultivated pasture and to compare the results with the porosity of a similar soil still under native vegetation (Cerradão, i.e. Scierophylous forest).

1:	EMBRAPA Arroz e Feijão (EMBRAPA ARROZ E FEIJãO)
	EMBRAPA
2:	Unité de Science du Sol
	Institut national de la recherche agronomique (INRA)
3:	Institut des Sciences de la Terre d'Orléans (ISTO)
	CNRS : UMR6113 – INSU – Université d'Orléans
4:	Universidade Estadual de Londrina, Department of Agronomy
	Universidade Estadual de Londrina

subject

:

Sciences of the Universe/Continental interfaces, environment

keyword(s): Brésil – Mato Grosso do Sul – Amazonie – Cerrado/Latosol – Brachiaria Decumbens – Evolution des Sols sous Culture – Paturage – Forêt – Porosité – Agrégat – Etude Comparative

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From: Nathalie Pothier <>

Submitted on: Tuesday, 22 August 2006 11:41:17

Updated on: Monday, 4 September 2006 10:46:41