When Chinese cabbage enters the heading stage in autumn, the temperature gradually decreases, the photosynthesis of leaves decreases, the traction of transpiration decreases, and the distance of calcium moving in Chinese cabbage is shortened, especially the photosynthesis of new leaves inside is weak, so it is difficult for new leaves to get enough calcium. After Chinese cabbage enters heading stage, new leaves are most vulnerable to calcium deficiency. This is also the most important period for the formation of Chinese cabbage yield. When Chinese cabbage is short of calcium, symptoms such as dry heart and Phnom Penh will appear, which will seriously affect the yield and quality of Chinese cabbage.
Some peasant friends who are inexperienced in the problem of dry heartburn of Chinese cabbage think it is a bacterial disease and blindly use drugs to prevent it. But in fact, dry heartburn of Chinese cabbage is a physiological disease, which is mainly caused by improper management. Taking medicine naturally has no effect. There are also farmers who do not pay attention to the prevention and management of heartburn in dried cabbage, and only pay close attention to prevention and control after getting sick, which often fails to achieve good prevention and control results. In view of the problem of dry heartburn of Chinese cabbage, our farmers should take all-round prevention from seedbed to storage. The earlier the prevention, the better the later prevention effect. In addition, most farmers' friends said that the dry and timid Chinese cabbage was blindly supplemented with calcium because of calcium deficiency during the growing period. Calcium deficiency in Chinese cabbage will cause Chinese cabbage to be dry and timid, but calcium deficiency is not the only reason for Chinese cabbage to be timid. Insufficient soil, excessive phosphorus, excessive use of nitrogen fertilizer, insufficient soil dry matter, and high temperature during the growing period lead to Chinese cabbage.
Due to many farmers' friends' insufficient attention to the disease and improper prevention and treatment methods, the problem of dry heartburn in Chinese cabbage is getting worse year by year, especially in plots with long planting time, and the disease is very serious. Therefore, the prevention of dry heartburn in Chinese cabbage should not be blind. On the basis of recognizing the causes, targeted prevention and control should be carried out from the seedbed, so as to achieve better prevention and control effect. In view of the problem of dry heartburn in Chinese cabbage, the agricultural machinery recycling station will tell you the causes of dry heartburn in Chinese cabbage, the regularity of symptoms, the situations that are easy to happen, the plots that often occur, and how to take preventive measures in the whole breeding process of Chinese cabbage, such as sowing, growing season and storage.