Research On Effect Of The Slope Planting Grass To Soil Erosion Process In Red Soil Region

The red soil region of Southern China is second only to water and soil loss region of loess plateau.The landform is fluctuate much there,there are various types of parent material,the contradiction between human and land is prominent,the eco-environment is fragile and the vegetation is seriously degradated factors,seriously restricted the regional ecological environment construction and economic sustainable development.This paper selected granite red soil in Changting County.Through study the different ways of planting grass control technology of soil and water loss on red soil slope under natural rainfall.Analysed the different ways of grass and soil erosion features technical evolution of the regulation under the rainfall and rainfall intensity.The results showed that 1)The relationship between rainfall erosion on slope affects the amount of different planting patterns of soil size is in turn:The control group>the full coverage of grass>the ditch of grass>the strip of grass.2)The influence of rainfall intensity on slope soil erosion size present positive correlation with the rainfall intensity.That is,the amount of soil erosion on slope increases with the increase of rainfall intensity 3)The influence of coverage of vegetation on soil erosion on slope is:the vegetation on slope soil erosion significantly when vegetation coverage in 90%,with the increase in vegetation cover,soil runoff and sediment on slope decline.The vegetation coverage on the effects of soil erosion is not significant when coverage of more than 90%,with the slope without significant erosion phenomenon.4)The change characteristics of soil water infiltration and moisture is that:Water infiltration ability is strong and the water conservation is the best in the strip of grass experimental area.5)Soil particle transport:The composition of the sediment particle erosion is<0.25 mm,a large number of fine particles losing with the of runoff is the important cause of soil degradation and ecological deterioration,the best effect of intercepting sediment is the strip of grass experimental area.