不同水肥组合对玉米水分利用效率及经济效益的影响

Effects of Different Water and Fertilizer Group on Water Use Efficiency and Economic Benefit in Maize

对不同肥水组合的玉米水分利用效率及经济效益进行了研究。结果表明:高肥低水的水分利用效率最低,经济效益差;高肥中水、低肥高水组合的水分利用效率较高,其中低肥高水经济效益最高;中肥中水条件下可获得较低投入的最佳效益,但产量较低;高肥中水的水分利用效率最高,是高产节水的最佳组合,经济效益大,是实现玉米节水高产的重要环节。

The effects of water use efficiency and economic benefit of maize under different water and fertilizer groups have been studied. The results showed：the water use efficiencies under high fertilizer-low water was lowest and economic benefit was lower ; the water use efficiencies under high fertilizer-middle water, low fertilizer-high water were higher and economic benefit of the latter was the highest,it could be get the best benefit of lower devotion under middle fertilizer-middle water,but the yield was lower;the water use efficiency of high fertilizer-middle water was the best and economic benefit was higher,it was the best coordination that obtaining high yield and saving water,it was most important link that realized super high yield under high fertilizer-middle water.