北方地区早春种植结球甘蓝，常出现严重的“先期抽薹”现象，这不仅会大大降低产量和品质，而且还会严重影响菜农收入。 所谓甘蓝“先期抽薹”是指：春甘蓝通过春化阶段，定植后经过长日用后出现提前抽薹，不结球的一种生理现象。据调查：诱发产生这种现象的原因：（一）与品种 Northern cabbage cultivation in early spring, often a serious “pre-bolting” phenomenon, which will not only greatly reduce the yield and quality, but also seriously affect the income of vegetable farmers. The so-called “early bolting cabbage” refers to: spring cabbage through the vernalization stage, after planting after long-term emergence of bolting, non-ball a physiological phenomenon. According to the survey: induce the reasons for this phenomenon: (a) with the species