期刊
PESQUISA AGROPECUARIA BRASILEIRA
卷 51, 期 9, 页码 1213-1222出版社
EMPRESA BRASIL PESQ AGROPEC
DOI: 10.1590/S0100-204X2016000900021
关键词
Crotalaria juncea; Mucuna pruriens; carbon and nitrogen stocks; Cerrado; mitigating greenhouse gases
资金
- National Aeronautics and Space Administration (Nasa)
- United States Environmental Protection Agency (EPA) through the Large-Scale Biosphere-Atmosphere Experiment in Amazonia (LBA) [ND-07]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [312035/2013-6]
The objective of this work was to evaluate the effect of two legumes (Crotalaria juncea and Mucuna pruriens), as cover crops, and of natural fallow, as a control treatment, on the emissions of NOx, N2O, and CO2 from an Oxisol cultivated with corn, under conventional and no-tillage systems, in the Cerrado region, in Central Brazil. Variations of CO2 fluxes in the soil were explained mainly by soil humidity and, in the legumes, under conventional system, by soil NH4+-N concentration. Plots with legumes under no-tillage system had higher annual emissions of CO2, NOx, and N2O than natural fallow. Results show that the use of legumes as cover crops favors the emissions of NOx-N + N2O-N and CO2-C. However, when considering the potential for mitigation of CO2 and nitrogen oxide emissions from the soil, it is important to evaluate changes in soil carbon and nitrogen stocks.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据