白菜春化采种的最大优点是采种量高,平均亩产150—175斤,缺点是无法进行对结球植株的选择,如连年采用此法会引起种性退化。一般是大母株采种与春化采种交替进行。春化采种主要有直播和育苗两种方 The biggest advantage of cabbage vernal seed collection is the high seed production, the average yield of 150-175 kg, the disadvantage is that the selection of plants can not be made on the ball, such as successive years of using this method will cause degeneration. The general is the mother plant seed collection and vernal calligrapher alternately. There are two main types of vernalization and live seedling