不同肥水组合对夏玉米水分利用效率及经济效益的影响

利用大型防雨设施池栽,设置施肥和灌水二因素三水平,就其不同肥水组合对夏玉米水分利用效率及经济效益的影响进行了研究。结果表明,高肥低水、中肥低水及低肥低水水分利用效率低,经济效益差,中肥中水及低肥中水水分利用效率较高,是中、低肥量条件下稳产高效益的最佳组合;高肥中水水分利用效率最高,耗水系数最低,是高产节水的最佳组合;高肥高水互高水互作效应大,产量水平达１３５００kg/hm^2以上,水分利用效率高,经济效益大,是实现夏玉米超高产的最佳肥水组合。

The Effects of Water Use Efficiency and Economic Benefit in Summer Corn Under Different Water Coordinating Fertilizer

Using pools in waterproof installxtion, set up two factor and three standard. The effects of water use efficiency and economic benefit in summer corn under different water use efficiency and economic benefit in summer corn under different water coordination fertilzer have been studied.The results show: the water use efficiencys under high fertilizer-low water, middle fertilizer-low water, low fertilizer-low water are lower; and economic benefit are no good; the water use efficiencys are higher under middle fertilizer-middle water, low fertilizer-middle water, it is the best coordination which reach steay yield and higher benefit; the water under efficency is the highest under high fertilizer-middle water, but the consume water coefficient is the lowest, it is the best coordination which obtaining high yield and saving water; the water use efficiency and the economic benefit are the best, the yield surpass 13 500 kg/ha, it is the best coordination that realizes superhigh yield in summer corn under high fertilizer-high water.