Experimental Research on Sand Blown Characters from Sandy Land with Different Vegetation Cover in East of Yellow River in Ningxia
宁夏河东沙地不同植被覆盖度的土壤起沙特征试验研究

In order to evaluate the effect of vegetation recovering measurements for the east sandy land of Yellow River in Ningxia, we conducted experiment on dustfall at different height and different distance from tuyere, and on sand trap at different height in May 20-23, 2004. The applied instruments are the Horizontal Dustfall Acceptor at five heights designed by ourselves and the Vertical Sand Interceptor produced by the Agriculture and Stockbreeding College of Inner Mongolia. The underlying surfaces for experiment include bared sand dune, low-covered natural grassland, closed rehabilitating grassland, ecological controlled grass- land compounding with straw-checkerboard and air seeding measurements, and recultivated farmland. Results show that the most serious wind erosion occurred on bared sand dune, the best sand controlling effect on the enclosed grasslands and the second effect on straw-checkerboard areas; the recovered farmland and the moving dunes are ready for wind erosion.