In the spring, when the temperature is low, the fruit trees are not revived. In the early spring, 1000 times liquid (500 kilograms) of the general tree nursery tree can be sprayed to insulate the tree trunks and tree branches to restore the fruit tree life command system. The application of basal fertilizer before germination in early spring has slower fertilizer effect. It has little effect on flowering and fruit setting and the governorship of new shoots in fruit trees. In the later period, it will lead to overgrowth of tree growth, affecting flower bud differentiation and fruit development.

It is recommended to use as little base fertilizer as possible and spray foliar fertilizers at the same time. At the same time, it can combine spring irrigation and topdressing chemical fertilizers. It is mainly composed of nitrogen and phosphate fertilizers, with suitable amount of potash fertilizer, and sprayed with new high-fat film to greatly increase the effective component ratio of fertilizer. In order to promote flowering and fruit setting, large trees should be topdressed with nitrogen fertilizer from the beginning of March to the beginning of April, or be sprayed with foliar fertilizer. During flowering, 2% ammonium sulfate, 0.3% potassium dihydrogen phosphate or 0.2% borax can be sprayed.

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