Effects Of Different Disturbed Belt On Soil And Water Conservation Of Sloping Farmland

In order to reduce the potential of soil and water loss,different disturbed belt are set up in runoff plots.The experiment was carried out in 5°,1° and 15°.We want to find out the impact of different disturbed belt work on soil and water conservation.The disturbed belt of the experiment is a bar which is 30cm.disturbed belt's variables include the position of the horizontal bar(set in Above or below),the level of the slope(horizontal or the original slope form)and the coverage condition of bar(covered or not covered).Disturbed belt have 8 situations.The experiment cover 27 runoff plots.The experimental results showed that:(1)With same disturbed belt,the initial time producing runoff of different slope is shown as:5°>10 °>15 °.All disturbed belt delayed the initial time producing runoff.5° disturbed belt(below,horizontal and covered)runoff slowest.15° disturbed belt(control group)runoff fastest.5° disturbed belt is 8.6 of 15° disturbed belt(control group).(2)Reducing the slope of cultivated slope land and setting disturbed belts both reduced the runoff yield.With same disturbed belt,the runoff yield increased with slope of cultivated slope land.The runoff yield in 1° is 1.15?1.51 of 5°.The runoff yield in 15°is 1.57?1.98 of 5°.Setting disturbed belts reduced the runoff yield.Compared with the control group,the runoff yield decreased by 61.8%at most.The cover of disturbed belt is significant for reducing the runoff yield.disturbed belt(below,horizontal and covered)had the minimum runoff.Compared with the control group,the total runoff yield decreased by 55.0%?61.8%.(3)Setting disturbed belts reduced the sediment yield.Compared with the control group,the sediment yield decreased by-59.5%at most.With same disturbed belt,the sediment yield increased with slope of cultivated slope land.Compared with the other groups,disturbed belt(below,horizontal and covered)had the minimum sediment.It's total sediment yield decreased by 55.0%?61.8%.(4)Setting disturbed belts can reduce the runoff yield and the sediment yield.The cover of disturbed belt is very important-disturbed belt(below,horizontal and covered is best for soil and water conservation.This approach can be generalized.