五因子二次回归正交旋转组合设计试验,建立产量函数模型,经多点产量预报与实际吻合。模型解析结果:增施基肥和灌水产量递增幅度较大;改变密度产量变幅较小。米醋与基肥、追肥有明显的交互效应,随着基肥与米醋浓度的提高,产量递增幅度较大,且每亩节省氮素化肥20—40公斤。产量高的最优生产条件为每亩2,100—2,500株,基肥五千公斤左右,少量氮素化肥、叶面喷撒米醋浓度0.5%,或仅亩增施尿素40～60公斤,白菜亩产五千公斤以上. Five-factor quadratic regression orthogonal rotation combination design test, the establishment of yield function model, the multi-point yield forecast and the actual match. The results of model analysis showed that the increase of basal fertilizer and irrigation yield increased by a large margin; Rice vinegar and basal fertilizer, topdressing had obvious interaction effect. With the increase of basal fertilizer and rice vinegar concentration, the yield increased a lot, and 20-40 kg of nitrogen fertilizer per mu was saved. The optimum production conditions for high yield are 2,100-2,500 plants per acre, about 5,000 kilos of basal fertilizer, a small amount of nitrogen fertilizer, 0.5% concentration of vinegar on the foliage, or 40-60 kilograms of urea alone, Thousand kilograms or more.