多年来我县从华北地区引进了300多个大白菜品种进行试验,其中小包头类型的“太原1号”熟期适中,可在洮河沿岸各地作麦后复种栽培,目前已成为主体品种。全县每年播种2000多亩,需要菜籽1000多斤。多年来依靠省外调购,常因数量不足或质量不高,在一定程度上影响生产的发展。为了解决生产上存在的这一问题,从1975年起,我与郊区菜农配合,摸索大白菜良种的繁育技术,从中取得了一些经验。一、母株栽植多少与品种纯度的关系。1974年春,我选了1个典型的“太原1号”大白菜种株,栽植在隔离条件好的院子中。当年收获的菜籽播种后在田间出现了与原品种性状不 Over the years my county from North China introduced more than 300 varieties of cabbage trials, of which a small package type of “Taiyuan 1” moderate maturity, can be around the banks of the river for multiple cropping wheat, has now become the main species. The county sowing more than 2000 mu per year, need more than 1000 kg rapeseed. Over the years rely on procurement outside the province, often due to the lack of quantity or quality is not high, to a certain extent, affect the development of production. In order to solve this problem in production, from 1975, I worked with vegetable farmers in suburban areas to explore the breeding techniques of Chinese cabbage and gained some experience. First, the number of mother plant variety purity and relationship. In the spring of 1974, I chose a typical “Taiyuan 1” Chinese cabbage plant, planted in a good yard of isolation conditions. The rapeseed harvested at that time did not appear to be characteristic of the original cultivar in the field after sowing