According to your fertilization plan, it is basically reasonable. To protect the fruit with nutrition, this is an important measure to improve flower quality and reduce the second physiological fruit drop. Because the flowering period consumes a large amount of nutrients in the plant body, the organic nutrient stored in the plant body is reduced to the lowest point of the year by the flowering stage. Because, in the first 10-15 days of budding, nitrogen-based fertilizer is used to promote flowering, and when the flowering reaches 2/3 of the total amount, the fertilizer fertilizer, which is mainly composed of compound fertilizer, is applied, and whether or not to top-dress after flowering should be considered as a plant. Consider the amount of flowers, age, and color of the leaves. For example, if you have a large amount of flowers, you may need to chase it before you apply it. However, about 10 days before flowering, the plant growth regulators and foliar fertilizers containing nutrients such as zinc, boron, magnesium, manganese and calcium should not be neglected. Because at this stage of the plant, cytokinin should be at a relatively high level relative to other endogenous hormones. The main synthesis organs of cytokinin (root tip, stem tip, etc.) may have a certain influence on the synthesis of cytokinin due to low temperature and spring drought; and the development of young fruit after decimation needs a relatively large amount of cytokinin. Therefore, it is recommended to alternately apply phytocytopenicillin and foliar fertilizer 2-3 times during the above period regardless of whether the tree vigor is prosperous or not. To help flower organ development and promote young fruit turn green.
From about 10 days after flowering until the second physiological fruit drop, 30 ppm gibberellin (2 g 85% gibberellin crystal powder 60 kg water) was sprayed once every 10 days. Usually spray 2-3 times. Of course, if you add 10 ppm 2,4-D will work better (2,4-D has auxin action at low concentrations). However, due to the large side effects of 2,4-D, we do not advocate the use of 10 ppm nitric acid instead of or simply using gibberellin. The principle of the above-mentioned plant growth regulators protecting fruits is to suppress the development of abscisic acid resulting in the formation of off-layer formation of young fruits and fruit disks, and to reduce fruit drop. In addition, if the plant has sufficient fertilizer and leaves in the early stages, the leaves are dark green, and the tree vigor is more prosperous, the trunk or main branch may be circumcised while spraying. One can inhibit the hair growth of the summer shoots, while the other can retain the organic nutrients above the cut mouth, so as to better meet the nutrient needs of young fruit growth and development.
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