| The effects of conservation tillage systems on soil chemical properties in southern part of Mu Us |
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| DOI：10.7606/j.issn.1000-7601.2008.06.01 |
| Key Words: conservation tillage soil chemical properties soil degradation Mu Us sand land North of Jingbian |
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| Abstract: |
| In order to protect soil and water on cropland and reduce soil erosion an experiment of conservation tillage with corn planting was conducted. The field experiment adopted no-tillage （NT） stalk-mulching （SM） plastic mulching （PM） and conventional tillage （CT） to investigate the effects of the conservation tillage on soil chemical properties. The results indicted that soil pH at the depth of0～20cm under NT and SM was lower than PM and CT. Under NT and CT soil organic matter available N available K available P were accumulated on the top soil. The soil organic matter and available K increased with the implementing times of tillage. And the available N and available P decreased but the NT SM and PM decreased slower than CT. NT was adverse for the accumulation of total N and the tillage system had no effect on the total P. The over results showed the conservation tillage was a major way for developing sustainable soil productivity conserving soil fertilities and controlling soil degradation in sandy area. |