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我省的鲁西南、鲁西等地,在大白菜制种时普遍采用露地越冬制种方法(即半成株采种法)。此法与原来采用的小株采种法相比,其优点主要表现为种株生长健壮,产量较高,成熟期早及节省工料等。特点是省工省力,成熟期提前能尽快占领大白菜种子市场,所以此法已得到大面积推广应用。这种采种方法也存在一些缺点与不足,比如种株易早衰,病虫害较
Shandong Province, southwest of Luxi, Luxi and other places, the common use of Chinese cabbage in open-field winter seed production methods (that is, semi-mature seed collection method). This method compared with the original small seed collection method, the main advantages of its performance for the sturdy growth of plants, higher yield, early maturity and save materials and so on. It is characterized by labor-saving and labor-saving. As early as possible, it can seize the Chinese cabbage seed market ahead of time, so this method has been widely popularized and applied. This method of harvesting also has some shortcomings and deficiencies, such as premature decay, plant diseases and insect pests