During the Chinese cabbage filling period, the phenomenon of "dried heart" often occurs: the plants grow in a normal shape, the edges of the leaves are immersed in water and there is mucus, and then dehydration, wilting, and drying, and the mesophyll is translucent. Cabbage "Dry Heart" is a kind of physiological disease. The main cause is calcium deficiency. When the disease is severe, the leaf ball is hollow, which seriously affects its yield and quality. In addition to measures such as selecting disease-resistant varieties, reasonable watering, increasing organic fertilizer, timely sowing, and strengthening field management, the disease should be supplemented with calcium fertilizer. The specific method is:
First, 16% of calcium nitrate granules and 0.5% of boric acid bentonite granules are scattered into the center of Chinese cabbage cabbage.
Second, in the period of Chinese cabbage rosette period to Baoxin period foliar spray 0.7% calcium chloride solution, spray every 7 to 10 days 1, even spray 3 to 5 times.
Third, in the Chinese cabbage seedling stage, the rosette period, the core period of spraying respectively 0.7% calcium sulfate solution, spraying 50 kg per acre.
In addition, in order to prevent the spread of such diseases, the diseased plants should also be cleared in time.
First, 16% of calcium nitrate granules and 0.5% of boric acid bentonite granules are scattered into the center of Chinese cabbage cabbage.
Second, in the period of Chinese cabbage rosette period to Baoxin period foliar spray 0.7% calcium chloride solution, spray every 7 to 10 days 1, even spray 3 to 5 times.
Third, in the Chinese cabbage seedling stage, the rosette period, the core period of spraying respectively 0.7% calcium sulfate solution, spraying 50 kg per acre.
In addition, in order to prevent the spread of such diseases, the diseased plants should also be cleared in time.