Effects of soil management systems on soil microbial activity, bulk density and chemical properties

Pesquisa Agropecuária Brasileira

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