| In order to provide evidence for irrigation and nitrogen application to the super 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 1 125 m·hm-2,W2 2 250 m·hm-2，and W3 2 700 m·hm-2)and three nitrogen rates (N0 0 kg·hm-2,N1 180 kg·hm-2,N2 270 kg·hm-2)for nitrogen experiment.The effects of nine treatments on water consumption in 0-140 cm soil layers,leaf area index (LAI),dry matter,yield,and water and nitrogen use efficiency were studied.The results showed that increasing drip irrigation amount mainly improved soil water contents of 0-60 cm soil layers,and indirectly reduced the storage consumption of 60-140 cm soil layers,through significantly increased total water consumption in the winter wheat field,but the effect of increasing nitrogen application on soil water content was not obvious.The yield was increased with the increase of fertilize under the same irrigation levels,but the yield was only increased with the increase of drip irrigation amount under N2 conditions.With the increase of drip irrigation amount (or N application rate) from booting to maturity,LAI,photosynthetic potential and dry matter accumulation amount of population were increased,and the dry matter storage in vegetative organs before anthesis transferring to the grain quantity,translocation ratio and contribution for grains were reduced,and the contribution of dry matter accumulation amount after anthesis to grains was increased,while the agronomic nitrogen use efficiency of nitrogen (AEN) was reduced.The optimal water and nitrogen combination increased yield more obviously than single factor(irrigation or N), with the improvement of water and nitrogen use efficiency.Higher yields(9 051.9 and 9 189.6 kg·hm-2) were obtained under W2N2 and W3N2 treatments.Taking the yield and cost into consideration,the total drip irrigation amount and total N application rate were 2 250 m·hm-2（750 m·hm-2 each at jointing,booting,flowering stages），270 kg·hm-2（90 kg·hm-2 and 180 kg·hm-2 at jointing and booting stages） in the spring were recommended,for water and nitrogen management modes in the super high-yield field of winter wheat in North Xinjiang. |
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