Effects of Conservation Tillage of Soil Porosity of Maize-Wheat Cropping System
The studies were conducted on the effect of two single practices, including soil tillage and returning straw to soil, and the interaction on soil porosity of maize-wheat cropping system. Eight treatments were from the combination of four tillage practices, conventional tillage (C), zero-tillage (Z), harrow-tillage (H) and subsoil-tillage (S) included, and absent straw (A) or present straw (P). Total porosity, capillary pore and no-capillary pore of soil were investigated. The results showed that the soil total porosity of 0-10 soil layer was affected mostly, conventional tillage can increase the capillary pore of soil, but the no-capillary pore of S was the highest. Returning of straw can increase the porosity of soil. Through the analysis of affecting force, it can be concluded that interaction of soil tillage and straw is the most important factor to soil porosity, while the deciding factor to no-capillary pore was soil tillage treatment.
Soil tillage Maize-wheat cropping system Soil porosity Affecting force
Li Zengjia Ning Tangyuan Han Bin
College of Agronomy, Shandong Agricultural University, Taian 271018 China Agricultural Universities, Beijing 100091
国际会议
郑州
英文
182-189
2007-10-01（万方平台首次上网日期，不代表论文的发表时间）