Effects of conservation tillage on soil porosity in maize-wheat cropping system
2009
Tangyuan, N.,Shandong Agricultural Univ., Tai'an (China). State Key Lab. of Crop Biology | Bin, H.,China Agricultural Univ., Beijing (China). Coll. of Agronomy and Biotechnology | Nianyuan, J.,Henan Science and Technology Univ., Luoyang (China). Agronomy Coll. | Shenzhong, T.,Shandong Agricultural Univ., Tai'an (China). State Key Lab. of Crop Biology | Zengjia, L.,Shandong Agricultural Univ., Tai'an (China). State Key Lab. of Crop Biology
A study was conducted on the effect of two single practices, including soil tillage and returning straw to soil, and their interaction on soil porosity of maize-wheat cropping system. Field experiments involved four tillage practices, including conventional tillage (C), zero-tillage (Z), harrow-tillage (H) and subsoil-tillage (S), with straw absent (A) or straw present (P). Total porosity, capillary porosity and non-capillary porosity of soil were investigated. The results showed that the soil total porosity of 0-10 soil layer was mostly affected; C can increase the capillary porosity of soil, but the non-capillary porosity 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, whereas the controlling factor to non-capillary porosity was soil tillage treatment.
显示更多 [+] 显示较少 [-]