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春甘兰早熟栽培中,往往出现未熟抽苔现象,严重地影响产量和品质。甘兰类蔬菜抽苔开花,必须在完成春化和光照两个阶段发育后才能形成。接受春化阶段的营养体必须具备一定的大小(一般茎粗0.5—0.6厘米,叶宽5厘米以上),在10℃以下的低温经一定的时间后,就在生长点的顶端产生质变,停止叶片原始体的分化,而形成花序的原始体。以后在长日照和较高温度下抽苔、开花结实。早熟春甘兰在冬季育苗,幼苗长到一定粗度,便很易通过春化阶段,出现未熟抽苔现象。不同的品种通过春化阶段
Early spring cabbage cultivation, often immature bolting phenomenon, seriously affecting the yield and quality. Brassica oleracea vegetables flowering, must be completed in two stages of vernalization and light development to form. To accept the vernalization of nutrition body must have a certain size (usually stem diameter 0.5-0.6 cm, leaf width 5 cm above), at a low temperature below 10 ℃ after a certain period of time, the growth point at the top of the qualitative change, stop Differentiation of leaf primordium, while forming inflorescences of the original body. Later in the long sunshine and high temperature bolting, flowering strong. Early spring cabbage nursery in winter, seedlings grow to a certain thickness, it is easy to pass through the vernalization stage, there is immature bolting phenomenon. Different varieties through the vernalization stage