Effects of Brackish Water Sprinkler Irrigation on the Photosynthetic Characteristics,Root Distribution and Yield of Winter Wheat
In order to explore the rational utilization method of brackish water and formulate a reasonable sprinkler irrigation mechanism of brackish water,based on the experimental station in Hebei low-plain salt water area,the effects of freshwater sprinkler irrigation,2g/L and 3g/L salinity brackish water sprinkling irrigation on the leaf photosynthesis characteristics,root distribution and yield of winter wheat were studied through two consecutive years of field plot experiment.The results showed that compared with freshwater sprinkler irrigation(CK),the leaf net photosynthetic rate(Pn),transpiration rate (Tr),leaf water use efficiency (LWUE) and limited value of stomatal (Ls) of winter wheat in grain-filling stage in 2020 and 2021 in the brackish water sprinkling irrigation treatments with the mineralization degree of 2g/L and 3g/L all decreased than those in freshwater sprinkler irrigation(CK). Compared with freshwater sprinkler irrigation,2g/L brackish water treatments had no significant effect on the growth and yield of winter wheat,while 3g/L saline water treatment significantly inhibited the growth and yield of winter wheat,and the accumulation of salt further inhibited the growth of winter wheat in the second year.The research results indicated that the application of brackish water sprinkler irrigation could alleviate the effects of drought stress on the production of winter wheat in the low-plain areas of Hebei which was lack of freshwater resources to a certain extent. 2g/L The saline water sprinkler irrigation with the mineraliza-tion degree of 2g/L could relieve the water shortage in agriculture,but it also could reduce the inhibition of salt accumulation on the growth and yield of winter wheat,and ensure normal agricultural production activities.
万方数据
维普
