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Five ways to dwarf fruit trees
Variety dwarfing - selection of short-stem dwarfing varieties with genetic characteristics is the main approach for dwarf dense planting. The main feature of these varieties is grafted on the Qiaohua anvil, which still shows short dwarf trees, full and compact canopy, short and thick branches, large leaves, high germination rate, weak branching ability, good ventilation and light transmission, and early results. Dwarfing rootstocks - The use of dwarfing rootstocks is another major approach for dwarfing and dense planting. Dwarfing anvil has obvious dwarfing effect on grafted varieties, and it is currently used in apple production. For example, the M series and MM series imported from the United Kingdom, the P series imported from Poland, etc., these rootstocks can be propagated by methods such as layering and cutting. Main girdling and inverted skin dwarfing - In June, girdling or looping of the trunk and main branches had the effect of controlling tree growth, increasing nutrient accumulation, and promoting flower bud formation. At the same time, it also weakened the growth of the root system, thereby achieving the purpose of tree dwarfing and early results. Pruning dwarfing - During winter pruning, shoots of branches need to be cultured, leaving 1 to 3 axillary buds short cuts. During the summer cut, two to four leaves of the base of the new shoot were cut short to promote the formation of a short side shoot. If long branches are found, they can be repeated and shortened until a short branch is obtained, thus making the tree dwarf. Dwarfing of regulators - The use of growth regulators of plant growth regulators can inhibit tree growth and have a significant dwarfing effect, which is a new approach to dwarf close planting. The currently used regulators include PP333, B9, ethylene, chemocyclin, and orthotropin. By using growth regulators, tree growth can be significantly controlled, short stems can be promoted, and fruit set-up rates can be improved.