A preliminary study on the agricultural water resources balance and eco-agriculture program in a semiarid region--A case study from the west area of Jilin Province
半干旱区农业水资源平衡及生态农业规划初探 —以吉林省西部为例

According to the balance condition between supply and demand of agricu ltural water resources,in order to im- prove the agricultural water resources bala nce and rise the ecological benefit of the agriculture ecological system,the str uc- ture of the system was regulated by using linear programming. The results show that the shortage of the water resources and the agricultural eco-environment c an be improved and the ecological benefit of the system can be risen obviously b y cutting down the farmland area suitably and expanding the artificial grass,for est and waters area,and the stability of the grain output and agricultural econo mic benefit at present may be kept.