Cherry is a prosperous fruit tree, only a few months a year is the depletion of tree nutrients, most of the time in the storage of nutrients, and the apical dominance is particularly obvious, excessive growth, a small number of flower buds, affecting the cherry of the coming year Yield, how does summer regulate the cherries?
How to regulate the tree in summer cherry?
First, scientific fertilization
Cherry saplings need to go through 3-5 years to produce results. In the past few years, they did not see the benefits. Farmers are often unwilling to invest in them. They simply apply some cheap nitrogen fertilizer such as urea, ammonium bicarbonate, calcium ammonium nitrate, etc., resulting in excessive tree growth. Affects the formation of flower buds.
The ratio of nitrogen, phosphorus, and potassium needed for cherry during the young tree period is 2:2:1. Fertilizer is mainly supplemented with nitrogen and phosphorus to promote root growth and increase branching, but it also needs to be supplemented with certain potassium fertilizer. Scientific fertilization can make cherry grow steadily. . During fruit period cherry, if it grows too vigorously, it is necessary to reduce the amount of nitrogen fertilizer and the tree with less fruit set, and then add 1-2 kg balance of compound fertilizer after harvesting. For the orchard with poor flower bud quality, the boron and zinc trace element fertilizers can be sprayed with pesticides after the cherry is harvested (flower bud differentiation period) to improve the quality of flower bud differentiation.
Second, reasonable pull branches, trim, timely picking
Pull branches mainly by adjusting the trunk and branch angle, ease the tree potential, and promote early results, after the sap flow to mid-July on the main branches, lateral branches pull branches, opening angle to 70 degrees -80 degrees is appropriate.
Through pruning and retreating, pruning measures can be used to improve the ventilation and light transmission conditions in the crown, balance the nutrients in the tree, and control the crown, which can extend the cherry fruit life span. Through topping, control branches prosperous, increase branches and branches, expand the crown; when the new shoots grow to 15-20cm, or with 5-7 large leaves, can carry out mild topping, reduce nutrient consumption, promote fruit Fruit development and flower bud formation.
Third, spray control agent
For overgrown cherry trees, spray control agents, such as paclobutrazol or PBO, can be sprayed before, during, and after cherry shoots. Excessive growth of summer shoots and excessive litchi, PBO spray concentration of 100-150 times is appropriate, paclobutrazol 150-300 times is appropriate, according to the degree of tree vigor to adjust the spraying concentration; application of high concentrations, the tree Potential control cannot be maintained; application of too low concentrations, too weak tree vigor is not good.
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