Study Of Water-Nitrogen Application Pattern On High Yield And Efficient Under Drip Irrigation Winter Wheat In North Of Xinjiang

Providing evidence for irrigation and nitrogen application will be of great significance to the high-yielding winter wheat production. Two split-plot experimental designs were conducted with different irrigation and nitrogen to study the water consumption characteristics and water and nitrogen use efficiencies. There were three irrigation rates (W1 1125 m3·hm^-2,W2 2250 m3·hm^-2, and W3?2700 m3·hm^-2)and three nitrogen rates (No 0 kg·hm^-2, N1 180 kg·hm^-2, N2 270 kg·hm^-2)for nitrogen experiment, and to study the effect on water consumption in 0-140cm soil layers,root growth,charactristics, leaf area index ?LAI?, dry matter, yield and the water and nitrogen use efficiency of group in Xindong41 and so on. The results showed that:1.Increased drop water amount mainly improved moisture contents of 0-60 cm soil layers, and indirectly reduced the storage consumption of 60-140 cm soil layers, Also increasing drop water amount and nitrogen application to the increase amplitude on root dry weight,root length,root activity in 0-60 cm soil layers obviously higher than those of increasing drop water amount and nitrogen application only; mainly increased root drt, root length of 0-20 cm soil layers. increased root activity of 0-40 cm soil layers,the levels W2N2?3N2 were higher root quantity and activity.2.Increased drop water amount and nitrogen application,mainly increased Chi,Soluble protenial and Pn of flag leaf; Also increased water and nitrogen,the increased amplitude obviously higher than those of water?nitrogen? increased only; the levels W2N2?W3N2 were higher Chi, Soluble protein contents and Pn.3.Increased drop water amount and nitrogen application, LAI, photosynthetic potential and dry matter accumulation amount of group increased with drip irrigation rate ?or N application rate? from booting to maturity, reduced the storage in vegetative organs before anthesis transferring to the grain quantity, translocation ratio and contribution for grains, increased the contribution of dry matter accumulation amount after anthesis to grains, while reduced the agronomic nitrogen use efficiency of nitrogen ?AEN?. The suitable different water and nitrogen levels were obviously increase yield more than single factor irrigation ?or N?, at the same time, improved water and nitrogen use efficiency, the levels W2N2? W3N2 were higher 4. Increased drop water amount and nitrogen application, advancing the growth of root system, improving photosynthetic characteristics, inceasing dry matter weight accumulation was the important reason to obtain high yield. Considering the yield and cost, and the total drip irrigation rate and total N application rate were respectively 2250 m3·hm^-2,270 kg·hm^-2in the spring, which were the recommended models of water and nitrogen management modes in the super high-yield field of winter wheat in North Xinjiang.