| In order to find out the effects of water and nitrogen application on the population quality and yield of spring wheat under drip irrigation,four irrigation levels(1 500,3 750,6 000 and 8 250 m·hm-2,termed as W1,W2,W3 and W4,respectively) and four nitrogen levels(0,225,300 and 375 kg·hm-2,termed as N0,N1,N2 and N3,respectively) were set up in 2017 and 2018,under the condition of field drip irrigation. The differences of tiller number,productive tiller rate,LAI,ratio of grain to leaf,dry matter productivity after anthesis,yield and its components of a spring wheat variety Xinchun 6 were compared and analyzed under different water and nitrogen treatments. The results showed that in the two years,all of the above parameters increased first and then decreased with the increase of irrigation amount under the same nitrogen condition,reaching to the top under W3. Similarly,with the increase of nitrogen amount under the same irrigation condition,the above parameters displayed the similar trends,reaching to the top under N2 treatment. Among all treatments,W3N2 treatment gave the highest tiller number,productive tiller rate,LAI,ratio of grain to leaf,dry matter productivity after anthesis,yield and its components. Therefore,under the conditions of this experiment,6 000 m·hm-2 irrigation and 300 kg·hm-2 nitrogen application were the best combination of water and nitrogen for drip irrigation of spring wheat. |
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