Four Principles of Apple Tree Summer Scissors
The time should be suitable to start from the growth period of new shoots or the formation of young fruit, until the spring shoots all stop growing longer (commonly known as the cap). In the middle and late May to early July, we will pick up the heart and carry out heavy picking (or continuous topping) of the upright shoots and competing branches on the branch. This can not only control the prosperous, promote secondary branches, but also conducive to the normal extension of the backbone. However, due to the large area of ​​pruned branches and leaves. Therefore, it is advisable to focus on the tree in the critical period of nutrient need (ie before flower bud differentiation) concentrated, and should not be premature or postponed.
When the tip is controlled in time from mid-May to early June, the tip control can be performed at about 5 cm at the base and semi-lignified. In practical operation, the tip of the spine is mainly applied on the auxiliary branch; if the tip of the branch on the main branch must be in the position of the tip 2 to 3 years old, that is, the internal branch is appropriate. If the tip of the distorted part appears on the back, it should be erased or re-picked in time. It can also be peeled off (skin-peeled). For large trees that grow vigorously and do not produce results, one or two laps can be cut around their stems and main branches. After the peeling, wounds should be immediately bandaged and the healing status should be checked frequently. If it is the first operation, the circumcision width is narrower than wide, and it is strictly prohibited to apply any medicine to the wound (especially avoid using high-concentration bactericide).
To promote the differentiation of flower buds during bud differentiation (ie from mid-May to the end of June), the main branch angle (especially the waist angle) should be opened to 70-80, the auxiliary branches should be twisted, and the pressure should be flattened to make the tree main. From the point of view, the promotion of control is reasonable. Saplings and early fruit trees continue to speed up the process of shaping and promoting the skeleton, transforming the supporting species (branches) into flowers, so as to promote the combination of control and correct trimming. The tree is based on the principle of improving light and promoting nutrition, strictly imposing loads of strong tree vigor, implementing single plant management for early fixing and focusing on eradication of size and size.
Appropriate thinning in the young fruit expansion period (ie, in June), appropriate removal of dense dendrites on the outside of the crown and overlying branches on the upright strong branch of the internal ridge can improve ventilation and light transmission conditions and change nutrient distribution. Enriching the posterior leaf buds to form flower buds also inhibits the growth of strong shoots and overcomes the shortcomings of the winter branches.
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