摘要
对短期玉米免耕和秋翻处理对耕层黑土孔隙度的影响进行了分析。结果表明,耕作处理对土壤孔隙度影响较大,毛管孔隙和贮存孔隙在整个剖面内免耕均小于秋翻,但秋翻处理下的中小孔隙占有很大比例。两个处理之间的大孔隙数量相差很小,多在3%～8%之间。秋翻总孔隙度表现出表层和底层差异很大,而免耕孔隙分布相对均匀,且上下孔隙连通性较好。
Studied on the effects of Short-term no-tillage （NT） and moldboard plow （MP） on Black soil porosity.The results showed that tillage treatments influenced soil porosity significantly.Both capillary pores and storing pores of NT were smaller than that of MP in the soil profile,but the small and medium pores of MP had a large proportion.There were little differences in proportion of large pores,ranging from 3% to 8%,between NT and MP.The total porosity of MP showed a significant difference from surface layer to the bottom,while the pore distribution of NT was homogeneously and connectively.
出处
《农业系统科学与综合研究》
CSCD
2010年第4期458-462,共5页
System Sciemces and Comprehensive Studies In Agriculture
基金
国家自然科学基金资助项目(40801071)
国家科技支撑项目(2006BAD15B01)
关键词
免耕
秋翻
黑土
孔隙度
no-tillage
black soil
porosity
