How to prevent calcium deficiency in vegetables in autumn
With the gradual decline of temperature, the ground temperature also decreases, the roots of vegetables are severely aging, and the absorption of nutrients is blocked. The vegetables in autumn are growing vigorously, and it is easy to be deficient in calcium. At this time, calcium should be replenished, but caution should be taken with caution. .
The general symptoms of calcium deficiency in vegetables are new parts of plants, such as buds of root buds and root hairs, dying and atrophy, new leaves adhering, new leaves often unfocused, and incomplete parts; the top of the fruit is easily sunken and dark brown and necrotic.
Control method: The amount of fertilizer should be controlled. It is not advisable to use too much fertilizer at one time, especially chlorinated fertilizers, such as ammonium chloride and potassium chloride, and should be irrigated in time to prevent soil drought. At the same time, foliar calcium fertilizer can be used as calcium nitrate. Spray fertilizer, the concentration of 0.3% ~ 0.5%, generally sprayed once every 7 days, even spray 2 to 3 times visible. The tomato should be sprayed on the 2 to 3 leaves above and below the flowering inflorescence, and the Chinese cabbage will be sprayed with calcium fertilizer when it begins to enter the balling stage.
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