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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 explore the high-yield cultivation techniques of maize, a quaternary quadratic universal rotary combination design was used to study the quantitative relationship between yield and nitrogen application, phosphorus application, potassium application and planting densities in cold-seedling transplanting. Establish the mathematical model of output as the objective function. The results showed that the regression models established showed that the yield of nitrogen, phosphorus, potash fertilizer and planting density reached a significant level. The effect of cultivation factors on the yield of maize transplanting seedlings translocation: nitrogen> density> potash> phosphate, obtained through the simulation of the equation, the transplanting of seedlings in cold field maize yield greater than 8 706.37 kg · hm-2 cultivation program The content of pure nitrogen was 159.0-1 171.0 kg · hm-2, the content of pure phosphorus was 111.1-133.5 kg · hm-2, the pure potassium content was 72.3-94.6 kg · hm-2, and the density was 68,000-7.3 thousand. hm-2.