Reducing the cracking of citrus fruits is a matter of general management. It does not rely on one or two sprays of fertilizers or fertilization to solve the problem. To solve the problem of reducing cracking, we must start from the fundamentals. For example, before and after the flowering, the tree crown is sprayed with about 2 cytokinins (usually at a concentration of 15-20 mg/l) and calcium element foliar fertilizer (eg 300-500 times the farmer's calcium or other commercial properties). Calcium fertilizer, with cytokinins, increases the number of cell proliferation of young fruit, increases potential space for future fruit enlargement, reduces sudden absorption of moisture by plants due to sudden rainfall, resulting in rapid development of pulp, and pulp cracking Peel phenomenon.
In the early stage, calcium is added to the plant, so that calcium and pectin are combined into a larger amount of pectin calcium to increase the toughness of the peel; before the season when the fruit is enlarged and rain is full, pay attention to cover the weeds or straw in the tree tray and keep it. The wettability of the soil reduces the fluctuation of the plant's absorption of water. Also, pay attention to the application of organic fertilizers (if organic fertilizers are used for transportation difficulties or high cost factors, consider using humic acids for fertilization, such as humic acid for protection or fortification), so that the soil can maintain its fertility and water retention capacity. It can be improved so that the plants have relatively stronger ability to regulate and resist adverse weather changes.
After the autumn shoots were extracted and the fruit's inflated period, brassinolide was sprayed several times on the canopy to add foliar fertilizer. At present, it is recommended that you spray 300-500 times more farmer's calcium on the crown alternately for about 7-10 days. Spray 300 times more of Bond's potassium dihydrogen phosphate (due to the fact that calcium and potassium ions interact with each other into the plant, so they should be used alternately) to minimize cracking.
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