广西旱地玉米不同密度和施肥措施对玉米产量的影响

Effects of different planting density and fertilizer ratio on maize yield in dry land from Guangxi

采用四元二次正交旋转回归组合设计方法,研究种植密度、氮素、磷素和钾素水平对玉米新品种桂单591产量的影响.结果表明：4种栽培因素对桂单591产量的影响顺序为氮素＞密度＞钾素＞磷素,在较大种植密度,氮肥充足时获得高产.桂单591的高产综合配套栽培措施：密度57 750～61 255株/hm^2、施氮量185.44～261.53 kg/hm^2、施磷量86.81～122.20 kg/hm^2、施钾量153.79～222.21 kg/hm^2可获得8 250.00 kg/hm^2以上的籽粒产量.

In this experiment, the effects of planting density, nitrogen, phosphorus and potassium on the maize yield of new variety Guidan 591 were studied with orthogonal experiment by a quadratic, orthogonal and pivoting regression for four factors. The result showed that the influence of four factors on the maize yield of Guidan 591 was in order of nitrogen, planting density, potassium and phosphorus. To gain high yield, certain planting density, ample nitrogen were needed. The optimal agronomic conditions were described as follows： planting density was 57 750-6l 255 plants/bin2, applying pure nitrogen 185.44-261.53 kg/hm^2, P205 86.81-122.20 kg/hm^2, K20 153.79-222.21 kg/hm^2, and then the high maize yield of above 8 250.00 kg/hm^2 was obtained.