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May apple planting calcium in May?
Apple calcium deficiency, prone to bitter pit disease, cork thrombosis, pox spot disease, heart rot fruit, water heart disease, cracking fruit and so on. The apple orchards, which are often partial nitrogen fertilizers, are most susceptible to calcium deficiency. May is the most important period for calcium supplementation in the tree, and calcium is mainly transported into the fruit within 4 to 5 weeks after flowering. Because the soil calcium application is easily fixed and the effect is poor, calcium-based preparations such as calcium nitrate and calcium chloride may be used as the main method for calcium supplementation. In the morning and evening, spraying is performed on the tree body, even spraying 2 ~ 3 times, 7 to 10 days apart. Pay attention to the positive and negative sides of the leaf and young fruit.