Linking physical quality and CO2 emissions under long-term no-till and conventional-till in a subtropical soil in Brazil

被引:0
|
作者
João Carlos Medeiros
Alvaro Pires da Silva
Carlos Eduardo Pellegrino Cerri
Neyde Fabíola Balarezo Giarola
Getúlio Coutinho Figueiredo
Felipe José Cury Fracetto
机构
[1] Escola Superior de Agricultura Luiz de Queiroz (ESALQ/USP),Departamento de Ciência do Solo
[2] Departamento de Ciência do Solo e Engenharia Agrícola,Programa de Pós
[3] Escola Superior de Agricultura Luiz de Queiroz (ESALQ/USP),Graduação em Microbiologia Agrícola
来源
Plant and Soil | 2011年 / 338卷
关键词
Soil organic matter; Least limiting water range; Soil management systems;
D O I
暂无
中图分类号
学科分类号
摘要
The decomposition rate of soil organic matter (SOM) is affected by soil management practices and particularly by the physical and hydraulic attributes of the soil. Previous studies have indicated that the SOM decomposition is influenced by the Least Limiting Water Range (LLWR). Therefore, the objective of this study was to relate the C-CO2 emissions to the LLWR of the surficial layer of soil under two management systems: no-tillage (NT), conducted for 20 years, and conventional tillage (CT). Soil in NT presented greater soil organic carbon (SOC) stocks than in CT. Emissions of C-CO2 were greater in the NT than in the CT, because of the greater carbon stocks in the soil surface layer and the greater biological activity (due to the improvement of the soil structure) in NT as compared to CT. The use of LLWR associated with the measurement of C-CO2 emissions from the soil could help to predict the efficacy of the adopted management system for trapping carbon in the soil.
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页码:5 / 15
页数:10
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