1育苗技术培育壮苗是花椰菜早熟丰产的基础。为了提早收获春花椰菜,北方地区必须采用保护地育苗。壮苗的标准是:未通过春化阶段并具有8～10片展开叶;下胚轴节间短,叶片厚、色泽深,根群发达并密集于主根周围; Breeding nursery seedling technology is early maturing broccoli basis. In order to harvest early spring cauliflower, nursery plants must be protected in the north. Strong seedling criteria are: did not pass the vernalization stage and has 8 to 10 expansion leaf; hypocotyl short internodes, leaf thick, deep color, root well developed and dense around the main root;