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BIBTEX RIS

Caracterização de sistemas de manejo em latossolo vermelho utilizando parâmetros biológicos, físicos e químicos

2008; UNIVERSIDADE ESTADUAL DE LONDRINA; Volume: 29; Issue: 3 Linguagem: Inglês

10.5433/1679-0359.2008v29n3p473

ISSN

1679-0359

Autores

Norton Pólo Benito, María de Fátima Guimarães, Amarildo Pasini,

Tópico(s)

Soil Carbon and Nitrogen Dynamics

Resumo

The dynamics of an agricultural system are better understood by means of multifactor experimental approaches on soil ecology, involving physical, chemical, and biological attributes. This study evaluated the influence of four soil management systems on those attributes in a Typic Hapludox in Rolândia – State of Paraná, Brazil, in order to identify variations in each type of management. Evaluations included: soil porosity, bulk and particle density, aggregate stability, field capacity and permanent wilting point, granulometry, cropping profile, chemical characteristics, and soil invertebrate macrofauna. Biological activity showed a relationship with the structures observed in the profile (µ, microaggregate structures) and with the increase in aggregates between 0.5 and 2 mm found via the clod method. Soil management introduced changes in the soil profile, particularly down to a 0.2 m depth, especially in the pasture, where cattle trampling increased bulk density in relation to no-till. Water availability tended to increase in the no-till system, and there was also a tendency of higher number of macropores in relation to the pasture. Base saturation in the agricultural areas was between 50 and 75%. The invertebrate macrofauna decreased in agricultural areas, as compared to the forest.

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