Selection Of Spring Wheat Varieties Suitable For Drip Irrigation Model Of Xinjiang Big Pipe Line Ratio

【Object】:Identify the dynamic changes in water content before and after each irrigation and the difference in received irrigation water of different rows of TR6（one tube that serves 6 wheat rows of drip irrigation）and TR8（one tube that serves 8 wheat rows of drip irrigation）,and yield performance,dry matter and nitrogen accumulation and transport characteristics,grain quality of different varieties in TR6 and TR8,and to select suitable varieties for TR6 and TR8.【Methods】:Twenty spring wheat varieties（lines）from different regions such as Xinjiang,Inner Mongolia,and Ningxia were planted under the TR6 and TR8 drip irrigation modes,investigate the water and nitrogen supply,dry matter and nitrogen accumulation and transfer characteristics,the inter-row yield and its coefficient of variation and the inter-row quality and its coefficient of variation were used to select suitable varietiy for the drip irrigation model with large pipe-row ratio.And verified from the aspects of irrigation water use efficiency,photosynthetic characteristics,dry matter and nitrogen accumulation and transport characteristics.【Results】:Under the drip irrigation mode of TR6 and TR8,with the increase of the distance from the the dropper zone,the nitrogen and water supply of wheat rows decreased synchronously,the nitrogen supply was slightly smaller than the decrease in water supply.Among all varieties,the average rows yield of Xinchun 44 was high in the large pipe line drip irrigation mode,and its coefficient of variation between rows was small.In the TR6 drip irrigation mode,the average yield of Xinchun 44 was 8441 kg hm^-2,and the coefficient of variation between rows yield was 3.31.In the TR8 drip irrigation mode,the average inter-row yield of Xinchun 44 was 8212 kg hm^-2,and the coefficient of variation between rows yield was 6.24.The average yield of Xinchun 22 and Plateau.506 were low and the coefficient of variation of rows yield were large in the large pipe line drip irrigation mode.In the TR6 drip irrigation mode,the average inter-row yields of Xinchun 22 and Plateau 506 were 6340 kg hm^-2 and 6305 kg hm^-2,respectively,and the inter-row coefficients of variation were 12.78 and 9.12,respectively.the average inter-row yields of Xinchun 22 and Plateau506 were 5914 kg hm^-2 and 5774 kg hm^-2,respectively,and the inter-row coefficients of variation were18.57 and 20.31,respectively.Under the two drip irrigation modes,the irrigation water use efficiency,leaf area index,net photosynthetic rate,nitrogen fertilizer utilization efficiency of Xinchun 44 were high and the coefficient of variation between rows was small.While the irrigation water use efficiency,leaf area index,net photosynthetic rate,nitrogen fertilizer utilization efficiency of Xinchun 22 and plateau 506 were low and the coefficient of variation between rows were large.The protein content,sedimentation value,wet gluten,and starch content of Xinchun 37,38,and 39 were high,and the coefficient of variation between rows was small.Under TR8 drip irrigation mode,the protein content,sedimentation value,wet gluten,and starch content of Xinchun 38,39,and 44 were high,and the coefficient of variation between rows was small.Xinchun 37,38,39 and Xinchun 38,39,44 are high-quality and stable varieties under two drip irrigation modes.【Conclusion】:Xinchun 44 was high-yield and stable variety under the TR6 and TR8,and it showed high photosynthetic capacity,high irrigation water use efficiency,and high nitrogen fertilizer utilization efficiency under the drip irrigation mode of large pipe line.while Xinchun 22 and Gaoyuan506 were low-yield and unstable varieties under the TR6 and TR8,Xinchun 37,38,39 and Xinchun44 are high-quality and stable varieties under drip irrigation modes of Xinjiang Big Pipe Line Ratio.