大白菜、甘兰、萝卜等十字花科蔬菜,都是异花授粉作物,留种工作如不严格按照科学方法进行,就很容易造成优良品种混杂退化.因此,搞好这些蔬菜的留种,是蔬菜生产中的一项重要工作.下面我们谈谈搞好留种工作的几项主要技术措施,供参考. Chinese cabbage, cabbage, radish and other cruciferous vegetables are all cross-pollination crops, if you do not stay in strict accordance with scientific methods, it is very easy to cause hybrid degradation of fine varieties.Therefore, do a good job of these vegetables to stay species, Is an important work in the production of vegetables.Now we talk about several major technical measures to do a good job of retaining a seed for your reference.