How to remedy mango "false bearing"? Detailed explanation of prevention and treatment methods

We often see: when mango trees grow too vigorously, they show low yield or fail to set fruit. This is because vegetative growth dominates, while reproductive growth is at a disadvantage. In response to this situation, effective measures should be taken to solve the problem of mango trees not setting fruit or setting few fruit (that is, “false bearing”). According to the experience of fruit growers in various parts of Maoming, the following three effective measures can be adopted:

1. Carry out girdling. During the growth process, on the main branches or secondary main branches of mango trees that do not set fruit, make one horizontal cut or one full ring, deep to the junction of the phloem and xylem, but do not damage the xylem. In this way, the nutrients produced by the leaves are no longer transported downward and all accumulate above the cut, giving the shoots sufficient starch, protein, and fat and promoting flower bud differentiation. Combined with water control, fertilizer control, and deep digging of side ditches to lower the groundwater level, this is one of the good measures.

2. Carry out root pruning. The purpose of root pruning is to reduce the roots' absorption of water and nutrients and promote reproductive growth. The specific method is to dig a ring ditch about 60 cm deep and 30 cm wide vertically below the tree canopy in winter while combining with deep plowing and soil improvement, cut off the thick roots in the lower soil layer, expose them to the sun for five or six days, then apply decomposed organic fertilizer and cover it with topsoil. At the same time, in conjunction with winter orchard cleaning, carry out intermediate plowing and turning of the soil to a depth of 20 cm to cut off the absorbing roots in the topsoil, weaken the transport of water and nutrients from the underground part to the aboveground part, increase the concentration of tree sap, help the aboveground part accumulate nutrients, promote flower bud differentiation, and greatly benefit the increase of fruit-setting rate.

3. Do a good job of pruning. Investigation shows that the reason most mango trees do not bear fruit is excessive growth, which easily produces two or three flushes, late autumn shoots, and winter shoots, and the canopy branches are disordered, internal ventilation is poor, and the fruiting part moves outward. In response to this situation, pruning should be done well: remove thin and weak branches and dead branches, and also properly thin out part of the strong shoots and properly remove drooping branches, overlapping branches, and shaded branches. This has a good effect on the rational distribution of tree branches, allowing sufficient sunlight, increasing the accumulation of nutrients in effective shoots, favoring flower bud differentiation, and improving the fruit-setting rate.