How to fertilize mango to solve the contradiction between nutrition and reproduction

Fertilization of mango fruit trees should be based on the principle of adjusting the growth contradiction between nutrition and reproduction. It is necessary not only to promote the flowering and fruiting of mangoes in the current year and to control the vigorous growth of summer shoots, but also to promote the emergence and growth of autumn shoots of mango trees, so as to lay a good foundation for the next year's mango harvest. Nitrogen, phosphorus and potassium are still the main types of fertilization, especially to increase the amount of potassium and calcium, but also to add a small amount of manganese, boron, zinc, copper, iron and other fertilizers.

Mango

First, fertilizer before and after fruit harvest: mango has many hanging fruits and high yield, but the nutrition level of mango trees after hanging fruit is at the lowest period of the year. If there is no timely fertilization, the tree will be weak and it will be difficult to restore growth. It has an effect on the fruit and yield of the fruit-bearing mother branch and the mango in the second year. The focus of fertilization for the whole year is before and after fruit harvest, and the amount of fertilizer applied in this period accounts for 60% to 80% of the whole year.

Mango is mainly fertilized by topdressing outside the root before harvest, and some foliar fertilizer containing high phosphorus and potassium can be mixed and sprayed 30-45 days before harvest. In addition, 60 days before harvest, Fengshengshuling could inhibit the photorespiration consumption of mango trees, increase the accumulation of photosynthates, and improve the quality and yield of mango.

After mango picking, the fertilization is divided into two times: the first fertilization, and the quick-acting fertilizer is applied in the middle and late August, in order to make the mango tree recover as soon as possible, germinate and produce autumn shoots. Each mango tree was treated with 0.5 kg compound fertilizer and 0.3 kg urea. On the inside of the crown drip line, dig ring ditches and apply them shallowly. In case of dry weather, water should be irrigated after fertilization. The second fertilization, combined with deep ploughing and soil improvement, applied farm manure from the middle of November to December, applying 2030 kg of mature farm manure, 1 kg of lime, 0.5 kg of compound fertilizer, 0.3 kg of potash fertilizer and 10 kg of burning mud to promote the heading and flowering of mango trees.

Second, strong flower fertilizer: in early spring, before or during the germination of a large number of flower buds of mango trees, quick-acting fertilizer should be applied to promote flower development, improve flower quality and the proportion of bisexual flowers, enhance the ability of mango trees to resist bad weather such as low temperature, overcast and rain, and increase fruit setting rate. Each mango tree can apply 0.2-0.3 kg compound fertilizer, or 0.2 kg peanut bran, 0.2 kg potassium chloride or potassium sulfate, and 0.1-0.15 kg urea. Before and during the full flowering stage, 500 times boric acid was sprayed once, which could be combined with pest control, mixed with pesticides and foliar spraying.

Third, strong fruit fertilizer: the period from April to the middle of June after mango setting is the period of rapid growth, and it is also the period of summer shoot emergence. In this period of fertilization, nitrogen and potassium were supplied directly to coordinate the nutrient distribution contradiction between shoots and mangoes. Only through fertilization to meet the nutrition requirements of mango development, but also depends on the tree potential, the amount of hanging fruit, leaf color. The mango trees with strong and vigorous trees with few hanging fruits can be applied less or not, otherwise the summer shoots will aggravate the fruit drop. If the tree is weak and has many fruits, it is necessary to apply quick-acting fertilizer, applying 0.2-0.3 kg compound fertilizer and 0.15-0.2 kg potash fertilizer per plant, and spraying foliar fertilizer 2 times, generally using Lvwang series of foliar fertilizer or 0.2% potassium dihydrogen phosphate, which can be sprayed in combination with insect control.