Slope Cultivated Land Rainfall Runoff and Sediment Mechanical Composition in Different Tillage Patterns
In order to determine the law about mechanical composition of soil particle size in the slope farmland runoff and sediment under different tillage patterns.Using skimming ridge,horizontal ridge and no-tillage sraw multhing in 10° farmland to composite test.The results show that the order of runoff in different cultivation mode is as follows： Bare framland（LD） traditonal and skimming ridge farming mode（Ts） no-tillage and skimming ridge farming mode（NTs） no-tillage straw mulching and skimming farming mode（NTSs） traditional and horizontal ridge farming mode（Th） no-tillage and horizontal ridge farming mode（NTh） no-tillage straw mulching and horizontal ridge farming mode（NTSh）;under different tillage mode,sediment particle size composition of slope water and soil conservation are different,the sediment of LD sand particle content is significantly higher than other pattern,which under NTSh the clay content is the most loss.The least loss about silt content in sediment is under Ts.Under different tillage patterns,the distribution of sand grain composition was narrow in slope sediment in these mode as follows： LD,NTs,Th and NTh;the surface runoff from different farming mode,particle size in the 0.25~0.06 mm loses the most,when the group particle size range 0.06 mm,the order of soil loss in different particle size and different mode range is as follows： NTSh NTh Th NTSs NTs Ts LD,when the group particle size range 0.06 mm the order of particle size in soil erosion from different mode become to change.
国家科技期刊平台
NSTL
万方数据
维普
