Effect Of Tillage Position And Depth Of Soil Erosion On Sloping Land

For studying the influence of different tillage position and depth on the impact of soil erosion research on sloping farmland,the test imitates a total of 27 kinds of artificial simulation of rainfall of different slope, different ploughing location condition and different combined ploughing depth, study the different treatment combinations influence on slope surface runoff and soil erosion, then analyzing the main draw the following conclusion:(1) Start runoff time decreases with the increase of slope, along with the ploughing under position, which in turn increases, as the ploughing depth increases; Position of slope, ploughing and ploughing depth to start runoff time are extremely significant effect (P<0.01),and significant level:slope>ploughing position>ploughing depth.(2) No matter which kind of combination condition, the runoff all firstly increases with time then gradually stabilized; The runoff amount increases with the slope increasing, decreases with tillage depth increasing; Slope position and ploughing runoff has significant effects on runoff amount of started to 27 min (P< 0.01),27 min after the start of ploughing depth of runoff runoff amount of influence was not significant (P> 0.05); Significant effect level on runoff volume:position of slope>tillage>ploughing depth.(3) No matter which kind of combination condition, the slope with rainfall runoff and sediment concentration first presents decreasing on the whole, then gradually kepp steady state; slope runoff and sediment concentration increases with the Slope increasing,27 min of cumulative runoff has started from road-related as ploughing position, in the upper and lower, increases with the increase of ploughing depth; Slope position and ploughing runoff has started to 27 min of cumulative sediment yield were affected significantly, and the significant level is extremely significant(P<0.01),ploughing depth no significant impact on the cumulative sediment yield; Impact on the cumulative sediment yield:position of slope>tillage>ploughing depth.(4) The soil and water conservation benefit that selecting In the middle of the slope as Sloping wasteland is obvious, the central slope wasteland reclamation reduced slope runoff by 12.9%～16% compared with the upper,3.3%～8.1%reduction in sediment yield; slope wasteland reclamation reduced lower than middle slope runoff yield by 31.6%～37.8%,40.5%～53.3% decrease in sediment.