Pesquisa Agropecuária Brasileira | |
Effects of soil management systems on soil microbial activity, bulk density and chemical properties | |
Maria Alexandra Reis Valpassos2  Eloiza Gomes Silva Cavalcante1  Ana Maria Rodrigues Cassiolato1  Marlene Cristina Alves1  | |
[1] ,Universidade Estadual Paulista Dep. de Biologia Ilha Solteira SP | |
关键词: soil chemicophysical properties; biomass; soil deterioration; soil conservation; propriedades físico-químicas do solo; biomassa; degradação do solo; conservação do solo; | |
DOI : 10.1590/S0100-204X2001001200011 | |
来源: SciELO | |
【 摘 要 】
The objective of this experiment was to study the effects of soil management systems on the bulk density, chemical soil properties, and on the soil microbial activity on a Latossolo Vermelho distrófico (Oxisol). Soil samples were collected from plots under the following management conditions: a) natural dense "cerrado" vegetation (savanna); b) degraded Brachiaria decumbens pasture, 20 years old; c) no-tillage treatment with annual crop sequence (bean, corn, soybean and dark-oat in continuous rotation), 8 years old; d) conventional tillage treatment with crop residues added to the soil, and annual crop sequence, 10 years old. The continuous use of no-tillage system resulted in an increase in microbial biomass and decrease in soil basal respiration, therefore displaying evident long-term effects on the increase of soil C content. The no-tillage system also provided an improvement in bulk density and chemical properties of the soil. Hence, the no-tillage management system could be an alternative for the conservation and maintenance of physical and chemical conditions and the productive potential of "cerrado" soils.
【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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