Study of Soil Erosion Changes with Application of Chemical and Organic Mulches in Plot Scale

The reduction and or control of soil erosion has the very important in the conservation of soil and water resources. Accordingly, various methods is being used for control of soil erosion. Studies have shown that the application of organic and chemical mulches is the available and useful methods for soil and water conservation. Therefore, in the present study was conducted the effects evaluation of bean straw mulch (as an organic mulch) with levels of 25, 50 and 75 percent, polyvinyl acetate (as a chemical mulch) with level of 3 perecnt on parameters of soil erosion and sediment concentration. The experiments were conducted in laboratory conditions and under rainfall simulator with rainfall intensity of 80 mm h^-1 in duration of 10 min. The results of statistical analysis with GLM method showed that the treatments effects of used mulches were not siginificant on changes of soil erosion and sediment concentration. Also, the results showed that the concentration present of bean straw mulch was variable on soil erosion from 30.37 to 60.99 percent and sediment concentration from 12.87 to 23.11 percent. The polyvinyl acetate effect in level of 3 percent on reduction of soil erosion and sediment concentration measured 56.02 and 16.14 percent, respectively. Finaly, Application of polyvinyl acetate and bean residues in used levels, given that, these have not the effects of adverse environmental, and these can be suggested to reducing the soil erosion.