农田冬季覆盖作物对土壤有机碳含量和主作物产量的影响  

The effect of winter cover crop on soil organic carbon and crop yield

作　　者：王丽宏[1] 胡跃高[1] 杨光立[2] 曾昭海[1] 

机构地区：[1]中国农业大学农学与生物技术学院,北京100094 [2]湖南农业科学院土壤肥料研究所,湖南长沙410125

出　　处：《干旱地区农业研究》2006年第6期64-67,共4页Agricultural Research in the Arid Areas

基　　金：国家"十五"科技攻关项目(2004BA520A14)

摘　　要：从冬闲覆盖作物对土壤有机碳的固定及覆盖作物对主作物产量的影响等方面对国内外有关覆盖作物环境改良机理的最新研究结果进行了总结分析。认为,长期轮作覆盖作物可以增加土壤有机碳,提高微生物的活性,而且对主作物的产量提高有不同程度的促进作用。Soil organic carbon （SOC） loss often takes place in conventional-tillage, but the adoption of conversation tillage may reduce SOC loss, increase the content of surface soil organic matter, tt is important to study the effect of cover crop on carbon sequestration potential in cropland. This paper summarized the internal and external researches on the cover crop effect on SOC. The result indicated that cover crop rotation may enhance SOC,soil microbial biomass C, the activity of soil microbe, and increase the main crop yield.

关 键 词：覆盖作物 土壤有机碳 作物产量 

分 类 号：S344[农业科学—作物栽培与耕作技术]