The following points should be paid attention to when cultivating Chinese cabbage:
1. Variety selection: Chinese cabbage should be a variety that is resistant to low temperature and difficult to bolting, and matures 50-55 days after planting, or a variety that matures in about 65 days. Vegetable farmers can choose Korean Chundawang, Xiao Chun, Xinqiang, Japanese Liangqing, domestic Qiangqiang and disease-resistant Huangxin.
2. Suitable temperature for growth: The suitable temperature for the growth of Chinese cabbage in early spring is 10℃ ~ 22℃, and the growth will be poor when it is higher than 25℃. Chinese cabbage in early spring is easily affected by low temperature in the middle period before planting, which promotes flower bud differentiation, while it is easily affected by high temperature in the later period of growth, making it difficult to form good leaf bulbs.
3, seedling: Chinese cabbage seedling time is generally in the "beginning of spring" solar term. We should prepare the seedbed before sowing. About 5 square meters of seedbeds are needed per mu of land. In greenhouses or greenhouses, seedlings should be raised in nutrient bowls or paper bags. About 3000 plants should be planted per mu, and 1 ~ 2 seeds should be planted in each hole. After sowing, cover the soil with a thickness of 0.5 cm, cover it with plastic film, and spread straw mats at night to keep warm. The seedling age is generally about 30 days.
4. Planting: The planting time of Chinese cabbage in early spring is around "Beijing-Zhejiang". When planting, seedlings are required to have 4 ~ 5 true leaves, the temperature is stable at 10℃ ~ 13℃, 2 rows per border, and the spacing between plants is 40 cm.
5. Field management: After planting, squatting seedlings should be the main method to promote root growth. After that, the fat water will attack at the same time. According to the weather conditions, water 65,438+0 times every 8 ~ 65,438+00 days, and apply 65,438+05 kilograms of urea or 20 kilograms of nitrogen and potassium fertilizer with the water per mu. It is forbidden to flood irrigation with water, and watering should be based on wetting the ridge back. Foliage fertilizer can be sprayed during the rosette growth period, and 0.2% can be sprayed. At the same time, pay attention to keep the air fresh to prevent the spread of soft rot caused by high temperature and high humidity.