Experimental Research on Mechanism of Saving Water and Increasing Yield of Peanuts Using Irrigation on Plastic Film Cover

Under the condition of the thin soil layer and low fertility in sandy soil, the experimental research has been done using irrigation on plastic film cover on peanuts cultivation． A distinct good result on watersaving and yieldincreasing was achieved compared with the normal furrow irrigation． It saves water by 27.3　%, improves water productivity by 76.9　%, improves soil utilization ratio by 16.7%, and increases yield by 34　%～68.5　%. This research also made deep discussion on its mechanism of saving water and increasing yield. 