摘要
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.
作者
李萍
李梦寒
孙自保
LI Ping;LI Menghan;SUN Zibao(Scientific research management office,Agriculture and Animal Husbandry University,Nyingchi,860000,China)
出处
《高原农业》
2018年第6期618-621,675,共5页
Journal of Plateau Agriculture
基金
西藏自治区高校青年教师创新支持计划(QCZ2016-55)
关键词
水肥耦合
青稞
产量
Water and fertilizer coupling
barley
yield