First, improper thinning of branches can lead to sparse growth. Many growers remove a large number of shoots after fruiting, causing the flowering coefficient under the tree to exceed 40%. This results in the re-emergence of old leaves that have been dormant for a long time, which interferes with flower bud formation and leads to sparse foliage. The reduced leaf coverage lowers the production of photosynthetic materials, which is not beneficial for the healthy development of the tree.
The correct approach is to perform girdling after the spring tip growth has stopped, based on the tree's condition. Girdling should be done for about a week before proceeding with further pruning. This helps maximize sunlight exposure, improves nutrient distribution, and prevents excessive flower bud formation without negatively affecting it. The amount of thinning should be determined by the projected area under the tree, and the shading coefficient should ideally remain around 30% after pruning. Focus on removing branches that are more than two inches in length on the outer edges, thin or crowded inner branches, leggy branches with back and cut edges, competing branches, and those growing without space.
Second, many fruit growers improperly open branch angles in spring, leading to backstrips and poor flowering. For new shoots that aren't suitable for angle adjustment, it's best to manipulate them during semi-lignification to slow their growth. For main lateral branches with small angles, it's better to open the angle in autumn to avoid backstrips.
Third, some farmers twist too many shoots on the back branches, increasing the number of branches and reducing light penetration. When there's enough space on the back, once a new shoot reaches 35 cm or more, twisting the tip in the semi-lignified section (5–8 cm below the center of the head) allows full use of the back’s flowering potential without blocking light. On the same main branch, twists should be limited to 3–5, with the rest thinned out.
Fourth, heavy short cuts and over-pruning can cause regrowth of branches, leading to poor light transmission and reduced flowering. In practice, short cuts should be used carefully—only three to five large-leaf cuts should be left on branches that regrow after branching, and only for the re-growth of leaves on the branch.
Fifth, some farmers mishandle secondary shoots. Some cut them entirely, while others remove their tips or simply discard them. These actions violate the principle of nearest nutrient supply, resulting in less nutrients near the fruit and affecting fruit size. The proper method is to leave the fruit-bearing shoots at the top of the tree and avoid cutting or picking them, ensuring nutrients are directed to the nearest point.
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