The Origin, Species, Origin, Nutritional Value and Growth of Chinese Cabbage

Nutritional value of Chinese cabbage: Chinese cabbage is rich in vitamins. Eating more Chinese cabbage can have a good skin care and beauty effect. The cellulose in Chinese cabbage can not only moisten intestines and detoxify, but also promote the absorption of animal protein by human body. Chinese medicine believes that Chinese cabbage is slightly cold and sweet, and it has the functions of nourishing the stomach, promoting fluid production, quenching thirst, promoting diuresis and relaxing bowels, and clearing away heat and toxic materials. Folk also often say: fish makes a fire, meat produces phlegm, and cabbage tofu keeps peace.

Origin of Chinese cabbage: North China, introduced to South China, cultivated all over the country. /kloc-was introduced to Japan, Europe and America in the 0/9th century. There are many kinds of Chinese cabbage, including JIAOZHOU Chinese cabbage, Bai Qing Chinese cabbage, Tianjin green Chinese cabbage, Northeast Chinese cabbage and Yangcheng Chinese cabbage.

Meteorological conditions for the growth of Chinese cabbage: seedling stage: generally around the beginning of autumn festival, the average daily temperature is 20-25℃, and the sowing power is suitable. When the temperature exceeds 27℃, the growth potential of seedlings is weak and it is easy to get sick. When sowing, it is too dry to sprout, and the roots can't be rooted when it is waterlogged. At the seedling stage, the sunshine is weak and the rain is frequent, and the soil water content is 85% of the field capacity. Rosette period: suitable temperature 18-22℃, sufficient water, no cracks in the soil, cool and sunny weather and sufficient sunshine, which is beneficial to the growth of leaves and roots. Continuous rain, weak sunlight, high humidity and sudden use of high temperature cause diseases. Core-wrapping period: the suitable temperature is 12- 16℃, and the cool temperature is beneficial to core-wrapping, especially the large temperature difference between day and night, which is beneficial to the accumulation of nutrients. High temperature, sultry, cold and hot, drought and strong wind are easy to rot and cause disease, which is not good for parcels.

Harvest time: the suitable temperature is 4-8℃, and it should be aired in sunny days. When the temperature drops to -4 -5℃ in case of cold wave, freezing and frost, it will freeze.

"Don't blame beginning of winter for not cutting vegetables." According to statistics, within a week after I entered the winter, the guarantee rate of climate protection from freezing injury reached 80%, indicating that the harvested Chinese cabbage during this period will not be harmed in most years, but it will also be harmed in 20% years. In other words, the temperature is high and low at this time of the year, but at this time, Chinese cabbage grows very fast, harvests early, yields are low, and the core is poor. Late harvest is vulnerable to freezing injury, and timely harvest has high yield and good quality. When is the best time to cut vegetables, on the one hand, we should consider the solar terms, on the other hand, we should pay attention to listening to the weather forecast of cooling and freezing in the Meteorological Observatory.