Research On Prosess Of Undergrowth Loss The Soil And Water In Red Soil Hilly Region Of Southern China

The Red Soil Region in Southern China is the severest soil erosion region which is second only to loess plateau. Pinus massoniana forest is one of the most representative forest types,which is the largest area of degradation type in forest system structure in Southern China. Plantting plantation with the same tree, clearing undergrowth and litter, it results in woodland lacking of land cover,and "the sight of seen from afar, the Castle Peak exist while near to see soil and water loss".soil erosion of undergrowth is serious, and governance is difficult, which serious impact on the regional ecological environment and socio-economic sustainable development.This article take Hetian Town, Changting County as a researching area, setting three different treatments which is the eroded land of the original surface under Pinus massoniana forest(R1), remove the coarse layer of surface(R2), plowed30cm (R3);choosing five different management models,which is the model of mixed forest, bush and grass(M1), the model of closed forest(M2), the modal of sowing grass at the whole slope(M3),the modal of sowing grass and planting bush at line-shaped ditch(M4), the modal of fertilizing the eroded Pinus forest(M5);and one contrast treatment which is reserved forest(CK1).By means of artificial simulated rainfall experiments in field combined with laboratory experiments, from three aspects which is the process of soil erosion under rainfall,the impact with different treatment on soil particle migration and the benefit with different governance model on sand control and sediment reduction,this article analysis the development process and evolution of soil erosion under Pinus massoniana forest of Red Soil Region in Southern China, discuss the treatment effect with different governance models, provide reference for soil erosion control and ecological restoration under Pinus massoniana forest of Red Soil Region in Southern China.