In summer, pomegranate trees carry out life activities such as flowering, fruit setting, fruit development and flower bud differentiation. The center of this stage is to establish results. In terms of the characteristics of fertilizer requirements, based on good vegetative growth in the spring, nitrogen, phosphorus, potassium and boron are used together. In the use of nitrogen, it should be determined by the tree, flexible control, strong trees are not applied, moderate tree appropriate application, weak trees should be applied. For the golden tree, the amount of nitrogen, phosphorus and potassium is generally controlled between 1:0.5:1.
The time that the general quick-acting fertilizer is absorbed and utilized by crops (7-10 days) should be applied as far as possible before the initial flowering period; boron fertilizer can be top-dressed outside the flowering period to increase the fruit setting rate. After the flowering, the old and weak trees should be supplemented with nitrogen, phosphorus, and potassium fertilizers, combined with sparse flowering and fruit setting, and comprehensively adjusted to promote the restoration of tree vigor. Under bad soil conditions such as sandy gravel and other unfavorable conditions, it should be applied sparingly and sparingly. . The significance of summer fertilization is very significant. First, it is necessary to ensure flowering and fruit setting; second, for the development of young fruit; and third, to lay a good foundation for flower bud differentiation in the later period. In fertilizing methods, soil topdressing is the main method, and top-dressing fertilizers can also be used. For fertilizer types, ammonium bicarbonate, ammonium sulfate, urea, etc. for nitrogen fertilizer; calcium superphosphate for phosphate fertilizer; potassium sulfate or grass ash for potassium fertilizer; and compound fertilizer such as diammonium phosphate and potassium dihydrogen phosphate may also be used.
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