水肥耦合对春青稞产量的效应研究

Effect of Water and Fertilizer Coupling on Yield of Spring Barley

采用3414最优回归试验设计,探索了水肥耦合对春青稞产量的效应。结果表明:(1)不同水肥耦合明显影响春青稞的产量。除对照处理外,处理10产量最高,其次是处理6,处理4产量最低。(2)中、高灌水水平(W2,W3)与中、高肥水平(N2,N3,P2,P3)的水肥组合模式优于中水低肥、低水中肥和低水低肥组合。(3)不同水肥因子耦合对产量效应不同。其中,氮-磷耦合,氮-水耦合效应为正,而磷-水耦合效应为负。且耦合作用效应大小顺序为氮-磷耦合>氮-水耦合>磷-水耦合。(4)本试验条件下,春青稞最大产量为5 281.7 kg/ha,此时氮、磷肥用量和灌水量分别为360 kg/hm^2 199.25 kg/hm^2和2 300 m^3/hm^2。

Effect of water and fertilizer coupling on yield of spring barley was studied by experiment with 3 414 optimal regression design. The results showed that： （1） different water fertilizer coupling obviously affected the yield of spring barley. In addition to the control treatment, treatment 10 had the highest yield, followed the treatment, 6 and treatment 4 had the lowest yield; （2） the treatment of medium, high irrigation water level （W2,W3）combined with medium , high fertilizer level （N2,N3,P2,P3） was better than those treatment such as low, medium water combined with low fertilizer, low water combined with medium fertilizer; （3） the coupling effect of different water and fertilizer factors on yield was different, and Nitrogen - phosphorus coupling, nitrogen - water coupling effect was positive, and phosphorus - water coupling effect was negative, exhibiting the coupling effect order of nitrogen - phosphorus coupling 〉 nitrogen - water coupling 〉 phosphorus - water coupling; （4） under this test condition, amounts for the highest yield 5 281.7 kg/ hm2 was nitrogen 360 kg/ hm2, phosphorus 199.25 kg/ hm2 and water 2300 m3/hm2.