Effects of the integration of sunflower hedge and crop stubles on wind erosion prevention and control

Soil wind erosion is a main soil degradation process in the drough and arid-drough areas. Hedge is a form of windbreak, it can weaken wind velocity so as to reduce wind erosion. The results showed that the wind velocity was reduced by 81.25% and the quantity of wind erosion was reduced by 53.96% in crop stubble plots than ones in naked plots, and the role of hedge would be bigger if the distance was bigger from hedge at the range of 0～5 times of height of hedge. Among different integrations between hedge and different crop stubbles, the efficiency of hedge and sunflower stalk was most remarkable, then rape, last alfafa. It is concluded that wind velocity variation presented exponent trend at the different heights under the effect of hedge, and the correlation coefficient was over 0.84.