Summer tube technology after apple tree modification

After the transformation, most of the tree types in Weibei area become the trunk happy shape. On the other hand, the number of main branches of the trunk happy tree is only 3-5, which is greatly reduced compared with that before the transformation, but because the lower root system can still work completely, it generally (except the weak tree) will prosper and grow in the modified year. Therefore, we must pay attention to the summer management of the modified tree in order to prevent it from growing and shedding, and if improper management leads to the phenomenon of big and small years and even the next year of figs and fruits. Practice has proved that scientific summer management of trees is the main way to achieve high yield, high quality and high efficiency. The specific measures are as follows: first, timely replenish and pull branches on the basis of spring branch pulling, 1-2 times according to the tree potential, strong branches with no fruit or few fruits in the year of more than 1 year and less than 3 years can be pulled to horizontal or vertical state by (F-type) opener to inhibit their vegetative growth and promote flower bud differentiation. The strong branches with no fruit and few fruit for more than 3 years can be treated by the method of "continuous three saws". Second, handle the new shoots cautiously, reasonably renew the new shoots in the same year, properly remove too many and too dense new shoots, leave a new shoot for every 15-20 cm on the main branch, and leave a weak branch on the back for every 30-40 cm on the main branch to prevent sunburn. If the tree is more prosperous, it should leave a moderate and weak new shoot, and vice versa. After customs clearance, the new tips on the "living piles" can be selected according to the strength of the tree, and the rest of the branches can be opened horizontally with (E-shaped) openers when the rest of the branches grow to 60 cm. When the new shoot grew to semi-Lignification, the mediocre branch was selected to twist the shoot. The excessively prosperous shoots can be treated by rubbing branches so that they can be injured and stop growing and blossom earlier. New shoots that have not stopped growing before September should be picked out according to the situation. The fruit branch group which has been falling for more than 3 years can be renewed reasonably according to the situation. Third, controlling the potential to promote flowers to promote the flowers of temporary trees and branches by ring peeling. The main branch with too much fruit can be girdled 20-30 cm away from the trunk with a width of 0.5 cm. Trees with few fruits can be peeled around 50-60 cm above the ground on the trunk, with a width of 1 cm. Results the branch group used the method of multi-channel ring cutting for 1-3 times from early May to early July, respectively. Fourth, from mid-May to late June, the tree enters a period of vigorous growth, flower bud differentiation and fruit expansion. During this period, the tree has a greater demand for nutrition, so it is necessary to supplement 1-1.2 kg of compound fertilizer per plant in a timely manner. 0.2% Mel 0.3% urea solution and potassium dihydrogen phosphate can also be foliar sprayed to supplement nutrition to meet the needs of trees.