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The high-conversion of peach trees
First, plant selection Choose strong trees with a tree age of less than 10 years. If the tree vigor is weak, but the age of the tree is light and there is rejuvenation ability, it should be changed after strengthening soil water management and rejuvenation, or immediately after changing. Good management so that it can be rejuvenated as soon as possible. The tree age is 11 to 20 years, and the strong tree vigor can also be exchanged. If the tree age is more than 20 years, it has no replacement value. Second, the selection of varieties in accordance with "according to local conditions, due to city needs, strengths to avoid weaknesses, give play to the advantages" principle of selecting good varieties. The special early-maturing varieties suitable for planting in most places in Yunnan include early glow dew and spring flowers. The early-maturing varieties include early-maturing flowers, rose dew, snow and rain, Yuhualu and Qingfeng. The middle-maturing varieties include Zhaoxia, Xiaolin Shuimi and Xiahui No. 4, Beijing. From the nucleus; nectarine special early-maturing varieties are Qinguang Bud, May fire, early maturing varieties are Shuguang, Yanguang, Huaguang, medium-maturing varieties such as early red spider, Dan ink, red coral, Ruiguang 18 and so on. Third, change the tree shape according to planting methods and density selection tree. The three main branches with a row spacing of 3 to 3.5 meters and 4 to 4.5 meters naturally have a happy shape. The spacing of the two main branches is 2 to 2.5 meters and 4 to 6 meters. Fourth, change the number of joints joints should not be too much, usually 15 to 20 big trees, 9 to 12 medium trees, 3 to 4 small trees. Fifth, change the way to connect (A) spring for a change in the spring after the beginning of February, in accordance with the requirements of the replacement of plastic surgery, sawing large branches, leaving the exchange for the anvil, with splicing or mitered access, abdomen after a change . The advantage is that the growth period is long, and the tree canopy can be restored quickly, and flower buds can be formed that year. The disadvantages are that some interfaces have large cross-sections. The new callus is not easy to contain strict interfaces, and it is easy to cause wood dry rot of the anvil pile, which affects the growth and life of the joints in the later period. (b) Spring shaping, in the summer budding, in accordance with the requirements of plastic surgery, the anvil is left when the anvil is sawed in the spring, the whole tree shape is perfected, the buds are given new shoots, and the excess shoots are removed in the summer. At the base of 5 to 8 cm, use T-shape buds or stick buds to change the connection, and then anvil anvil (break 2/3, leaving 1/3 connected) at the interface 5 to 8 centimeters after 10 days, and the buds to be sent When the branches grow to 40 cm long to make nutrients, cut the anvil 1 cm from the interface. The advantage is that the cross section of the interface is small, the new organization is easy to contain strict interface, and the tree trend is not easy to premature failure; the disadvantage is to restore the canopy later, and postpone production and high yield for one year. Sixth, after the management (a) in addition to sprouting anvil where there is a bud, issued in a timely manner to wipe clean. (II) When the branches from the scion of the milk film are removed to a length of 40 cm, the film is removed. If the film is released prematurely, the callus of the interface will not grow well, affecting the survival and development of new shoots. If it is too late, it will lead to injury or even scion, and all efforts will be abandoned. (C) strengthen the management of the same as the regular peach tree, fine and timely soil moisture management, pruning and pest control. Low-yielding inferior trees, such as plums, apricots, plums, and cherries, can also be transformed by this method.