干旱区生态环境知识资源中心

For exploring the effects of soil and water conservation of different protective tillage technologies in sloping farmland of western Heilongjiang province, the experiments about rainfall-runoff, soil water storage and soil loss were conducted in the 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 the same with the natural rain fall; all of the 3 tillage measures studied had the effects of soil water storage increasing, runoff and soil loss decreasing. Compared with conventional tillage, the treatments of furrow damming had the best effect of runoff reducing, the treatment of the combination of film mulching and furrow damming had the both effects of soil water storage increasing and soil loss decreasing, no-tillage with straw cover treatment had the worst effects in the 3 aspects; the treatments of furrow damming, the combination of film mulching and furrow damming can deepen the soil layer for soil water storage. The research findings can provide reference for reasonable selection of water conservation measures in the semi-arid region of western Heilongjiang province.