Timely calcium supplementation for fruit trees can effectively prevent the growth of young leaves of fruit trees from weakening, chlorotic chlorosis of leaves, subsidence spots of fruits, and discoloration, softening and bitterness of pulp, which can significantly improve fruit quality and yield. The annual peak of calcium absorption in fruit trees is three times: the first time is about 30 days after flowering; the second time is during fruit expansion, about July; the third time is about 30 days before fruit picking. When applying calcium to fruit trees, the method of using foliar spraying is better. The spraying concentration of calcium nitrate is generally 0.3% to 0.4%, and spraying after fruit trees is sprayed is better. After the fruit is colored, it cannot be used, so as not to affect the coloration of the fruit. The spraying concentration of calcium chloride is generally 0.2% to 0.3%. The concentration of calcium chloride should be low in the young fruit and high temperature weather to prevent burning of leaves and fruits. It should be in the late fruit ripening stage or after fruit harvesting. Spraying. In addition, calcium chloride should be used less because it contains chloride ions. The spraying concentration of amino acid calcium is generally 0.3% to 0.4%. Spraying is started 20 days after flowering. Three peaks of calcium supplementation are sprayed one or two times during the year to promote fruit coloring and fruit growth. Sugar content, hardness and storability.
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