Kale (Brassica alboglabra L.H. Bailey or Brassica oleracea var. alboglabra Bailey), also known as white-flowering kale, isolate the blue, cover the blue, etc., for the Cruciferae brassica annual or biennial herbs. Chromosome 2n=2x=18. Kale mainly takes the fat and tender flower shoots and its young leaves as the edible part, which is characterized by unique flavor and rich nutrition, and can be fried, made into soup and pickled. According to the analysis (Huang Wei et al., 2000), every 100g kale edible part contains 92 ~ 93g of water, protein 2.37g, fat 0.5g, reducing sugar 1.09g, crude fiber 0.64g, 3.5g of carbohydrates, vitamin C 50 ~ 90mg, carotene 1.27mg, calcium 176 ~ 229mg, phosphorus 37 ~ 68mg, potassium 353mg, magnesium 52mg. 52mg, etc.

Kale can be cultivated in South China in the fall, winter and spring seasons, the supply period of up to 7 to 8 months, is the main vegetable of the local fall and winter seasons, especially in Guangdong Province cultivation is the most common, it is estimated that Guangdong Province each year, the planting area of about 3,333.4km2 or so. The main production area of Guangzhou City can achieve balanced supply of annual production, in addition to sales in the local market, there are large quantities of products sold to Hong Kong, Macao and Beijing, and exported to Japan and Southeast Asian countries, has become one of China's high-quality foreign exchange vegetables. In the Yangtze River Basin, kale in summer and fall sowing, fall and winter harvest market. From the early 1990s, Beijing, Shandong, Hebei, Liaoning and other northern provinces (cities) have been introduced from the south, but the cultivation area is small. Northern areas, generally in the spring and fall in the open ground or protected cultivation, 50 ~ 70d after sowing can be harvested for the market. In recent years, in North China's convenient transportation area has also established a kale summer production and export base, and its sales volume is also increasing. Due to the strong adaptability of kale, cultivation is easy, strong resistance, fewer pests and diseases, higher yields, significant economic benefits, coupled with a shorter growing period, can be sown in rows, the supply of a longer period of time, and its products are green in color, texture, crisp, sweet and refreshing, it is popular with consumers and producers of welcome.

Chinese kale germplasm resources are very rich, after generations of introduction, natural selection and breeding, etc., currently cultivated varieties around the author understands that there are more than 400.