摘要 How to improve the water use efficiency of rice in black soil regions was studied. The black soil region in paddy fields was chosen as the research object. The research showed the fertilizer coupling mathematical model with N,P,K, irrigation water (W) and water use efficiency(WUE), which was set up under the condition of controlled irrigation with quadratic D-416 optimized saturation design. The results showed that the decending order of single factor′s influence on the WUE was N，K，P，W. All the interactions between N＆P, N＆K, N＆W, K＆P, P＆W and K＆W on the WUE were raised initially, and when they reached a certain value, it began to decline. The decending order of each interaction on the WUE was K＆P，K＆W，N＆K，N＆P，P＆W，N＆W. When the WUE was targeted within 18-25 kg／km3, an optimized proportion plan was obtained in the 95％ confidence interval, i.e. N 8776-10332 kg／hm2,K2O 5237-6653 kg／hm2 and P2O5 3680-4671 kg／hm2. Furthermore, the late tillering of the soil moisture content was 7007％-7257％ of the saturated moisture content.
LIN Yanyu, ZHANG Zhongxue, XU Dan, NIE Tangzhe. Effect of water and fertilizer coupling optimization test on water use efficiency of rice in black soil regions[J]. 排灌机械工程学报, 2016, 34(2): 151-156.
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