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| Soil and water conservation effects of protective tillage measures on sloping farmland |
| Zhao Yusen1,Wei Yongxia1,2 |
| 1.Forestry College of Northeast Forestry University,150040;2.Water and Civil Engineering College of Northeast Agricultural University,150030: Harbin,China |
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Abstract For exploring the effects of soil and water conservation of different protective tillage technologies on sloping farmland of western Heilongjiang Province,the experiments on rainfall-runoff,soil water storage and soil loss for different tillage measures were conducted with runoff plots in Dongxing Village of Gannan County in 2007 and 2008.Results indicated that: the trend of the dynamic variation of soil water storage was same as the natural rain fall;all of the 3 tillage measures studied had the increasing effects of soil water storage,and decreasing effects of runoff and soil loss.Compared with conventional tillage,the measures of furrow damming had the best effect of runoff reducing,the measure of the combination of film mulching and furrow damming had the best effects on soil water storage increasing and soil loss decreasing,no-tillage with straw cover measure had the worst effects in the above 3 aspects;the measures of furrow damming,the combination of film mulching and furrow damming can deepen the soil layer of soil water storage.The research results can provide reference for reasonable selection of soil conservation measures in the semi-arid region of western Heilongjiang Province.
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Received: 05 November 2008
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