Abstract: The soil wind erosion is the main reason for the degradation of cultivated land and the decline of productivity in the agro-pastoral region in Northern China.The dust pollution of farmland has greatly affected the construction and protection of the agricultural ecological environment in China,and has become a shortboard for the construction of the life community of “mountains,rivers,forests,fields,lakes,and grasses” in Northern China.Therefore,improving the prevention and control of wind erosion and soil fertility cultivation in farmlands in the farming-pastoral interlacing areas in the north is the key to solving the problems of the ecological environment and the agricultural production in the north of China.This paper aims at the problems of the soil degradation,the soil fertility decline,and the resource utilization efficiency in the typical ecological areas of The Greater Hinggan Mountains along the foothills,Yanshan hills and Yinshan foothills.Based on the long-term positioning test,the indoor control test,and the simulation test,combined with the analysis of the literature data,the mechanism of wind erosion,the mechanism of the soil fertility decline,and the characteristics of the water holding capacity were revealed;the key technologies and models of cultivation and sustainable utilization of the wind erosion degraded farmland were innovated,which provided a theoretical basis and technical support for prevention and control of wind erosion and sustainable cultivation of farmland in Inner Mongolia and the agro-pastoral region in Northern China.

Key words: Agro-pastoral transitional zone, Wind erosion degraded farmland, Soil fertility to loss, Breeding technology