2. Fixing the stem: after planting, it should be fixed in time, with a height of 50 cm and a maximum of 60 cm. It is best to trim with the shape of a happy character, with a row spacing of 3×4 meters and 56 plants per mu. For early high yield, you can also adopt the cultivation mode of first density and then thinning, and use column pruning method for spacing plants, and cut off spacing plants after handover; Or they all adopt the happy shape of three main branches, which will be removed as planned after handover and replanted respectively.
3. Reasonable pruning: Pruning in summer should be carried out twice. The first time is in late May. When the main branch grows to 50 ~ 55 cm, the core should be removed, and the length of 3 ~ 5 cm should be removed. The terminal bud must be left with external buds. The purpose of this coring is to promote the early formation of the first side branch. At the end of June, the second coring still has external buds, but it is advisable to select the opposite side of the first lateral branch and extend the length of the branch to 40-45cm for coring to promote the formation of the second lateral branch. The control angles of three main branches are 55 degrees, the second main branch is 65 degrees, the third main branch is 75 degrees, and the other branches are 80-80 degrees.
4. Topdressing and fruit thinning: Young trees should not only promote the robust growth of trees, but also bear fruit early and have high yield, so as to enter the full fruit period as soon as possible. Nitrogen fertilizer should be applied before flowering, after flowering and at fruit expansion stage, and potassium fertilizer, zinc sulfate and potassium dihydrogen phosphate should be applied at the second fruit expansion stage to promote the increase of sugar and the gorgeous surface of fruit.
After three years, we should continue to apply farmyard manure and phosphate fertilizer. It is best to apply farmyard manure from the end of August to the beginning of September, because this is the second growth peak of fruit tree roots. If the fertilizer is not ready, it can also be applied after the leaves of the fruit trees fall. This topdressing depends on the crown diameter, and the depth should not exceed 40 cm, preferably 30 cm. Only dig symmetrical sides one year, and dig the remaining two sides next year, changing directions every year.
The proportion of leaves and fruits should be well controlled, and the shape of small fruits should be controlled at 15 to 20 leaves, and the shape of large fruits should be controlled above 30 leaves. If too much fruit is left, it will form a small old tree. According to the size and strength of the tree, it is necessary to keep the fruit properly, remove small fruits, deformed fruits and pests and diseases, improve the commodity rate, and increase production and income.