草地农业生态系统中的土壤侵蚀研究进展

Soil and water loss caused by soil erosion is a phenomenon of soil losses and drying up of water resources, which is the biggest issue of soil degradation faced by the whole world. About 80 percent of global soil erosion occurs on grassland. China is one of countries which confront the most serious soil erosion, wind storm and land desertification. It has been a high incidence area of modern sandstorm, which severely restrict the social and economic development of local and surrounding areas. “Grassland is the main part of preventing and reducing sandstorm”, thus mechanism of grassland soil erosion is an urgent academic problem in international grass academe. In contrast to study on soil erosion on farmland, study on mechanism of grassland soil erosion is far more behind. The reports that employing grazing experiments to quantitative study on mechanism of soil erosion are very insufficient. From the viewpoint of soil erosion agents on grassland, it is a new task that study on mechanism of soil erosion under grass ecological system in arid or semi-arid area. In addition, it is also an important research interests with a great value in theory and in practice.