大白菜性喜冷凉,在我国一般为秋季栽培,冬季收获上市。为了加速实现大白菜的周年供应,江苏省农科院蔬菜所从国外先后引进30多份耐热大白菜材料,经5年观察鉴定于1988年筛选出性状较为突出的两个新品种——“伏宝”和“夏丰”。这两个大白菜新品种,均具有耐热抗病、生育期短和经济效益高等特点,在夏季高温强光下依然生长正常,填补了大白菜“代缺”的空白,使大白菜四季都可栽种。该两品种结球紧实,产量高,平均每棵重约1.5公斤,亩产2 000～ Chinese cabbage likes the cold, in our country is generally cultivated in the fall, harvested in the winter market. In order to accelerate the annual supply of Chinese cabbage, Jiangsu Provincial Academy of Agricultural Sciences vegetables from abroad have introduced more than 30 heat-resistant Chinese cabbage material, after 5 years of observation and identification in 1988 screened two traits of outstanding new varieties - Fu Po “and” summer Feng. “ The two Chinese cabbage new varieties have the characteristics of heat-resistant and disease-resistant, short growth period and high economic benefits. They are still growing normally under high temperature and high light in summer, filling the gap of ”substituting" for Chinese cabbage and making the four seasons of Chinese cabbage Can be planted. The two species of knot tightness, high yield, the average weight of about 1.5 kg per plant, per mu 2 000 ~