种植密度和氮磷钾肥对育苗移栽玉米产量的影响

Effects of Nitrogen,Phosphorus,Potassium and Density on Yield of Raising Seedling and Transplanting Maize

为进一步探讨玉米高产栽培措施,采用四元二次通用旋转组合设计,对寒地育苗移栽玉米产量与施氮量、施磷量、施钾量的定量及种植密度的定量关系进行初步研究,建立产量为目标函数的数学模型。结果表明：建立的回归模型氮、磷、钾肥和种植密度对产量达显著水平。各栽培因子对育苗移栽玉米产量的影响大小顺序为：氮肥〉密度〉钾肥〉磷肥,通过方程模拟寻优得出,寒地育苗移栽玉米产量大于8 706.37 kg·hm-2的栽培方案为：施纯氮量为159.0~171.0 kg·hm-2、施纯磷量为111.1~133.5 kg·hm-2、施纯钾量为72.3~94.6 kg·hm-2、密度为6.8万~7.3万株.hm-2。

In order to further discuss high yield cultivation techniques of maize,the effects of applications of nitrogen,phosphate,potassium and density on the yield were studied based on the universal rotary composition designing method of 4 factors and 5 levels,and the objective function to establish the mathematical model was set up.The results indicated that the differences of N、K、P applications and the density with the yield were significant.The effect order of all cultivation factors on yield was NdensityKP.According to the mode,the fertilizer plan which the yield surpassed 8 706.37 kg·hm-2 was 159.0～171.0 kg·hm-2 N,111.1～133.5 kg·hm-2 P2O5 and 72.3～94.6 kg·hm-2 K2O,the density ranged 6.8×105～7.3×105 plants·hm-2.