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| DOI：10.13522/j.cnki.ggps.20180648 |
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| Efficacy of Several Tillages in Conserving Soil and Water in Slopping Areas at the Black Soil in Northwest China |
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NIU Xiaole， QIN Fucang*， YANG Zhenqi， LI Long， LI Xiaoqin， LIU Lichuan
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College of Desert Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
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| Abstract: |
| 【Objective】 Soil and water loss from slopping areas at the black soil in northeast China is a concern. Conservation tillage has been touted as an alternative to ameliorate soil erosion and improve water and fertilizer use efficiency. The objective of this paper is to compare the effectiveness of several tillages in reducing surface runoff, soil erosion and improving soil nutrients in the sloping areas.【Method】The experiment was conducted on a slope with slope angle of 10° under natural rainfall condition. The surface runoff, and the loss of soil and nutrients under the tillages were measured.【Result】 The bamboo ridge II tillage was most effective; compared to cross-slope tillage, it delayed the onset of surface runoff by 38 min, reduced runoff and sediment rate by 57.1% and 51.9% respectively, thereby increasing organic matter, nitrogen, phosphorus and potassium in 0~20 cm soil by 5.89%, 11.48%, 16.54%, 21.75%, respectively. 【Conclusion】 Under the same rainfall condition, the improvement of cross-slope tillage, bamboo-ridge I and bamboo-ridge II tillage in reducing runoff and sediment differed, compared to downslope tillage, with the bamboo ridge II most effective. |
| Key words: sloping farmland; tillage measures; soil erosion; the Black Soil region of Northeast China |
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