大白菜阳畦育苗早春定植杂交制种技术霍清涛霍晓妮魏新玲（河南省种子管理总站，郑州４５０００２）赵风军（济源市种子公司）杨建平（河南省农业科学院）我省大白菜杂交制种多采用小株采种露地越冬的方法。虽然该方法制种产量较高，但生育期较长，病虫害较多，而且还易遭... Chinese cabbage Yangba seedlings planted in early spring hybrid seed production techniques Huo Qingtao Huo Xiaoni Wei Xinling (Henan Province Seed Management Station, Zhengzhou 450002) Zhao Fengjun (Jiyuan seed companies) Yang Jianping (Henan Academy of Agricultural Sciences) Wintering method. Although the method of seed production higher yield, but longer growth period, pests and diseases more, but also vulnerable ...