1. Choose resistant varieties. 2. Scientific and rational fertilization. Add organic fertilizer, control the amount of nitrogen fertilizer, improve soil traits, and promote robust growth of plants. 3. Strengthen the management of fertilizer and water. Water should be poured before sowing, and small water should be poured in the seedling stage. The lotus seed stage and the ball stage should be topdressed separately to avoid concentrated fertilization. After pouring water, it is necessary to cultivate the loose soil in time. 4, pay attention to the choice of mouthwash. When planting Chinese cabbage, try to avoid cropping with crops such as cabbage and tomato that require a large amount of calcium. 5, timely supplementation of calcium nutrition. Foliar application of calcium fertilizer can promote the growth and quality of Chinese cabbage. During the rosette period of Chinese cabbage, spray the mixture of 0.7% calcium chloride and 50ppm naphthalene acetic acid or 50% of 1% calcium superphosphate solution to the heart leaves every 7-10 days. Spray continuously for 3 to 5 times. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone China Extract Powder For Use As Dietary Supplement Extract Powder, Extract Powder Manufacturer Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.bodybuildingoil.com