Distribution of origin of Chinese cabbage
Chinese cabbage is widely cultivated in all parts of China, mainly in North China and south of the Yangtze River, and the planting area accounts for 40%-60% of the sowing area of autumn, winter and spring vegetables.
Chinese cabbage is classified by time.
According to morphological characteristics, biological characteristics and cultivation characteristics, Chinese cabbage can be divided into autumn and winter Chinese cabbage, spring Chinese cabbage and summer Chinese cabbage, each including different varieties.
1, autumn and winter cabbage: widely cultivated in southern China, with many varieties.
Plant type is erect or waist-tied, mainly cultivated in autumn and winter, and can be divided into white stem type and green stem type according to the color of petiole.
The representative varieties of white stem types are Nanjing dwarf yellow, Changzhou Changbai stem, Guangdong dwarf black leaf, Hefei lobular vegetable and so on.
The representative varieties of green stalk types are Shanghai Aiji, Hangzhou Zaoyoudong, Changzhou green stalk vegetables and so on.
2, spring cabbage: the plants are more developed, and a few are upright or slightly waist-tied.
Strong winterness, cold tolerance and high yield.
According to bolting in the morning and evening and supply period, it is divided into early spring vegetables and late spring vegetables.
The representative varieties of early spring vegetables are Nanjing bright white leaves with white stems, Hangzhou late oil winter with white stems and green stems in Wuxi in March, and Shanghai slow in March.
The representative varieties of late spring vegetables are Nanjing April White with white stalks, Hangzhou silkworm cabbage and so on, and Shanghai April Slow and May Slow with green stalks.
3. Summer cabbage: it is cultivated in high temperature season in summer and autumn, also known as fire cabbage and soft cabbage. The representative varieties are Shanghai fire cabbage, Guangzhou Ma 'er cabbage and Nanjing Aiza No.1..