优抗3号是中国农科院资源区划所最新培育的中晚熟大白菜一代杂种。1997－1998年两年间参加北京、河北两地种子站品种科组织的区试，表现较好。两站1998年汇总的结果：北京地区参试品种中综合性状排名第一，667米’产净菜4500公斤以上，比对照北京新3号增产10.3％，净菜率达749 Youkou 3 is the latest generation of Chinese Academy of Agricultural Sciences resource division of middle-maturing Chinese cabbage generation hybrids. 1997-2998 two years to participate in Beijing, Hebei, two varieties of seeds Branch of the regional test organization, performed better. The results of two stations in 1998 were summarized as follows: The comprehensive traits of the tested varieties in Beijing ranked the first, with the net yield of 4,500 kg or more at 667 meters, an increase of 10.3% over the control Beijing No. 3 with a net food rate of 749