| Effects of conservative tillage on soil microbial biomass and soil organic matter in Hexi Oasis |
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| DOI：10.7606/j.issn.1000-7601.2007.04.33 |
| Key Words: no-tillage straw mulch soil microbial biomass soil organic matter yield |
| Author Name | Affiliation | | ZHANG Feng-yun | Department of Resources and Environmental Sciences， Heze College, Heze, Shandong 274015, China
.Agro-ecological Engineering Institute, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | CHENG Xue-feng | Department of Resources and Environmental Sciences， Heze College, Heze, Shandong 274015, China | | ZHANG En-he | Agro-ecological Engineering Institute, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| The influences of different quality of mulching straw, the height of standing straw and straw treating style to soil microbial biomass C (SMB-C), soil organic matter content (OM) and grain yield(Y) were studied with a filed experiment in Hexi corridor. The results showed: there was a clear tendency that SMB-C changed with the changes of seasons and that before sowing was the highest and after harvesting was the lowest. Soil operation in different period had different influences on SMB-C. OM in conservative tillage treatment was higher than that of conventional tillage from sowing stage and that in conservative tillage decreased with the increase of soil layer and that in conventional tillage had no difference. Grain yield were improved by the conservative tillage with straw cover or straw standing, and that of NPS20、NPS40、NS40、NS20、NSB40 and NSB20 were increased by 53.08％、46.59％、40.81％、19.93％、17.33％ and 4.34％ respectively compared with CT. |
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