In this paper,a field location experiment on the irrigation system of grape was conducted in arid desert climate region of northwest China,under mulching and without mulching,to achieve its high yield and high efficiency of water use.The results showed that or so 33% of water amount could be saved under mulching,the max daily water consumption and the key water demand period of grape was in berry growth period of its whole growth period.The results further indicated that the total water amount of grape in i...