How to protect the Fruit of Litchi Longan Mango

First, the pertinence of foliar spraying endogenous hormones and biomolecule plant organic nutrition. The essence of protecting the strong fruit of litchi, longan, mango and other woody fruit trees is to ensure that the young fruit can get the necessary nutrition for its growth and development in time and fully through the implementation of appropriate cultivation and management measures, so that it will not fall off. In recent years, research and production practice have proved that the purpose of protecting fruit and strong fruit can be achieved by using the absorption and conduction function of leaves. The main results are as follows: 1. Endogenous hormones (regulators) are sprayed on the leaves to regulate and supply the nutrients previously stored in the tree (in the fruiting mother branch) to the young fruit. to achieve the purpose of protecting fruit and strong fruit-this is a more cost-saving method when the fruit mother branch is stout and healthy, and the conditions of light, water and fertilizer in the young fruit stage are better. However, the effect of this method is not good when the fruiting mother branch is not strong enough (insufficient nutrition in storage) or poor light conditions, water and fertilizer conditions (such as drought) in the young fruit stage. Because prematurely regulating the nutrients stored in the mother branch is disadvantageous to the later fruit development, it is only sprayed during the fruit expansion period and used cautiously in the young fruit stage. 2. foliar spraying organic foliar fertilizers rich in biomolecule nutrients, such as organic liquid fertilizers rich in a variety of amino acids, vitamins, polysaccharides and trace elements, to replenish young fruits and leaves directly from the foliage and peel of young fruits. Improve the synthesis ability of leaves in order to achieve the purpose of fruit protection (such as litchi, longan, mango in the young fruit stage and fruit expansion stage spraying Shengzhifeng liquid fertilizer, nucleotide, etc.). 3. The combination of the above two kinds of substances: rotational spraying or mixed spraying. Second, the basic strategy of protecting and strengthening fruits in litchi, longan and mango this year. Due to the large number of litchi and longan fruit last year, the high nutrient consumption of trees, and the drought last winter, the nutrition storage of mother branches was affected this year, so the basic strategy for fruit preservation this year is to spray biomolecule nutritious liquid fertilizer, early fruit thinning and pest control, and never use only hormone foliar fertilizer as in the past.