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本试验以“鲁白8号”为试材,采用二次正交旋转回归设计方法,试验结果经电子计算机运算,建立了播期、密度、氮肥、磷肥、钾肥五项技术措施与结球白菜的毛菜产量和净菜产量关系的数学模型。经过计算机模拟,在3125个方案中筛选出亩产净菜7000～9000kg的优化技术方案856个。具体农艺方案是,8月13日～14日播种,密度为2118～2162株/亩,亩施纯氮17.31～18.83kg/亩,P_2O_5 16.47～18.27kg/亩,K_2O 19.43～21.29kg/亩。
In this experiment, “Lu Bai 8” was used as experimental material, quadratic orthogonal rotation regression design method was used. The experimental results were calculated by electronic computer and established five technical measures of sowing date, density, nitrogen fertilizer, phosphate fertilizer and potassium fertilizer, The mathematical model of the relationship between the yield and the yield of pure vegetables. After computer simulation, we selected 856 optimized technical programs of 7,000 ~ 9,000kg of pure vegetables in 3125 programs. The specific agronomic plan is sowing on August 13 to 14 with a density of 2118 to 2162 plants per mu, 17.31 to 18.83 kg / mu of pure nitrogen per mu, 16.47 to 18.27 kg / mu of P 2 O 5 and 19.43 to 21.29 kg / mu of K 2 O.