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根据农业系统工程学“最佳模拟配合法”原则,采用二次旋转组合回归设计,探讨了在半干旱地区立地条件下,可控因子(播种密度、氮肥施用量、磷肥施用量、磷酸二氢钾根外追肥用量和磷酸二氢钾根外追肥时间)对胡麻籽粒的增产效应,通过计算机模拟选优确立了两套旱地胡麻籽粒亩产大于90kg的优化方案。
According to the principle of “the best simulation and fitting method” of agricultural systems engineering, the regression model of quadratic rotation was used to study the effects of controllable factors (sowing density, N application rate, P application rate, Potassium topdressing fertilizer and potassium dihydrogen phosphate outside top dressing time) on the yield-increasing effect of flaxseed grains, two optimized sets of planted flaxseed grain yield of more than 90kg were established by computer simulation.