| Effects of no-tllage with different corn stubble treatments ontopsoil structure properties |
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| DOI：10.7606/j.issn.1000-7601.2010.03.14 |
| Key Words: no tillage corn stubble treatment topsoil structure soil aggregate |
| Author Name | Affiliation | | ZHANG Wen | Agronomy College，Shenyang Agricultural University, Shenyang 110161, China | | CONG Weiwei | Agronomy College，Shenyang Agricultural University, Shenyang 110161, China | | ZHAO Hongliang | Agronomy College，Shenyang Agricultural University, Shenyang 110161, China | | YI Ying | Agronomy College，Shenyang Agricultural University, Shenyang 110161, China | | HOU Libai | Agronomy College，Shenyang Agricultural University, Shenyang 110161, China |
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| Abstract: |
| Based on no-tillage with ridge way of corn in cold, windy and sandy areas in Northeast China, through the fixed-point experiment of conservation tillage in Zhangwu County from 2003, the effects on topsoil (0~30 cm) struc-
ture properties under three different kinds of corn stubble treatments of stubble mulch(SM), stubble coverage(SC) and Elimination of stubble(ES) were studied comparatively. The results showed that the treatment of SC to improve the soil structure properties was performed obviously. On the soil layers of 0~10 cm, 10~20 cm and 20~30 cm, >0.25 mm water stable aggregate content and aggregate stability were SC>SM>ES, and they decreased with the soil depth increas-ing. In different soil layers, soil bulk density showed ES>SM>SC, soil total porosity showed SC>SM>ES, and it
showed a decreasing trend with the deepening of topsoil. In different soil layers, the sand content of SC was less than that of SM and ES, but with topsoil getting deeper, the clay content of each treatment showed no regular change. |
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