Vegetable crops need more calcium. Absorbed calcium can play a variety of roles in the plant body. It can not only inhibit the infection of pathogens, but also improve the disease resistance of plants, metabolism, and once the vegetables are deficient in calcium, it will happen. All kinds of calcium deficiency symptoms.

First, the general symptoms of calcium deficiency in vegetables: plant regeneration site, root hair growth stagnation, atrophy and death, new leaf adhesion, can not be normal development, the new leaves are often coke edge, the top of the fruit prone to depression, dark brown necrosis.

1, tomato, sweet pepper umbilical rot: early fruit pulp is immersed in the front end of the fruit, peel intact, with the pericarp enlargement, the fruit front shrinkage depression off dark brown, lesions are often affected by secondary mold parasites, Rotten-topped, the fruit can still be colored when the non-rotten part of the fruit matures; the top of the bell pepper is not obvious as a tomato, and it is mainly brown withered, and the umbilical rot usually occurs when the size of the thumb is.

2, dry Chinese cabbage heart: Cut open the cabbage, visible edge of the inner leaf or together with the heart and leaves with brown dry. Sometimes leaves that have not been put on at the beginning of the game will also show symptoms of calcium deficiency, which is characterized by leaf shrinkage and brown rot.

3, celery calcium deficiency: the top growth is blocked, the new leaves yellow, leaf margin dry, no fresh plants, rooting observation shows less roots, yellow-brown, root branches rarely root hair.

Second, prevention and control measures:

1, control the amount of fertilizer, fertilizer should not be too high once, especially with chlorinated fertilizer.

2, timely irrigation to prevent soil drought.

3, spraying foliar fertilizer to supplement calcium, Bibi liquid fertilizer can be sprayed on the special foliar fertilizer, sprayed once every seven days, and even spray 2-3 times can be effective. Tomato should be sprayed on the 2-3 leaves above and below the flowering inflorescence. Chinese cabbage is sprayed when it begins to enter the ball stage.

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Zhejiang Lanhine Medical Products Ltd. , https://www.lanheyiliao.com