Effects Of Corn Straw Mulching And Polyacrylamide Applying In Surface Soil On Water And Soil Loss In Sloping Fields

The experimental research on the effects of runoff and sediment yield in the hilly land under the condition of PAM and corn straw used at the same time.The test design different maize straw coverage and applying different PAM content a total of 35 kinds of combinations for artificial rainfall test.Research the different combination of slope runoff and sediment yield and analysis,the results showed.In the corn straw coverage under the same conditions,the time began to flow increase increases as the density increases with the increase of PAM.Every 3 min production flow with the increase of the density of PAM presented first and then increase with the decrease of the steady state.Total flow rate with the increase of the density of PAM also presented first and then increase with the decrease of the steady state.Every 3 min of sediment yield with PAM first increase then decrease and increases with the increase of the density.Total sediment appear with the increase of the density of PAM first decrease then increase and decrease with the increase of the density.The PAM density under the same conditions,Start runoff time increases with the increase of corn straw coverage.The yield of every 3 min flow decreases with the increase of corn straw coverage,total flow rate also decreases with the increase of corn straw coverage.Every 3 min of sediment yield decreases with the increase of corn straw coverage.Total sediment yield decreases with the increase of maize straw coverage.In the density of PAM and corn straw coverage under the influence,Start runoff time increases with the increase of the whole.Every present the first 3 min production flow and then gradually increase with the decrease of the steady state.Present the first and then increase with the decrease of the total flow rate steady state.Every 3 min of sediment yield overall shows the tendency of decrease after increase first,then decreased.The total sediment also showed a trend of decrease leveled off after the first then decreased.