本试验采用3因素2次饱和回归设计方法,对机械化工厂化育苗条件下椰菜菜(Brassica botritis L.)幼苗生长的最佳营养条件进行了研究,建立了花椰菜幼苗生长量及叶面积与育苗营养液中氮磷钾浓度之间的2次回归模式,拟合度较高.利用回归模式分别对育苗前期和后期花椰菜幼苗生长的最佳营养浓度及氮磷钾3要素各自对花椰菜幼苗生长的促进效应进行了分析和探讨. In this study, the optimum conditions of seedling growth of Brassica botrytis L. under mechanized seedling culture were studied by means of three-factor-two-time two-times regression design. The results showed that the optimum growth conditions of seedling growth, The results showed that the regression model had the best fitting effect on the growth of cauliflower seedlings in the early and late nursery stages and the effects of NPK3 on the growth of cauliflower seedlings The promotion effect was analyzed and discussed.