Effects of brackish water irrigation on Photosynthesis and yield of Winter Wheat

In this paper, winter wheat was used as the research object. The chlorophyll content, net photosynthetic rate, light response curve and yield of winter wheat were compared with the experimental data from 2015 to 2017.The results show that:The brackish water of 3g/L has little effect on chlorophyll content. The physiological growth of winter wheat could be promoted by irrigation with 3 g/L brackish water at jointing stage, and photosynthesis could be promoted by appropriate salt stress. Salt stress can change the way crops use effective light radiation.The brackish water of 3g/L can promote the utilization efficiency of low effective light radiation in winter wheat.The brackish water of 5g/L will affect the leaf structure of winter wheat, reduce the response of leaves to high effective light radiation, and eventually lead to the decline of photosynthesis. Two years of brackish water irrigation will have a certain effect on crop yield.