① The pruning reaction of Marshal Red Star Tree is very sensitive, and the cultivation method of bearing branches on young trees should be cut less and put more. After the main branches are elongated and shortened, the growth potential should be reasonably controlled by pulling branches and opening angles, and the adjustment of pruning in summer should be paid attention to to prevent excessive growth.

② The branches of Marshal Red Star are soft and dry, and young trees should pay attention to cultivating the central trunk and main branches. The number of main branches at the base of the central trunk should not be too much, and the arrangement should not be "adjacent". There should be as many auxiliary branches between layers as possible, but they should not grow too fast, which will affect the growth of main and side branches. The central trunk should extend upward in a straight line, and it should be straightened with a stick when bending and deflection occur. The lateral branches and branches on the main branch should not be opposite, and the first lateral branch should not be too close to the central trunk to avoid forming a "door side". The elongated heads of main branches and lateral branches cannot bear fruit before they are formed. Irregular branches such as competitive branches and straight branches should be handled and controlled as soon as possible, and hidden dangers should not be hesitated.

(3) Marshal Red Star's branches are not resistant to injury, and many big wounds are not only difficult to heal, the tree is weak, but also susceptible to pests and diseases. Fruit farmers call it "afraid of knife goods." This requires that major wounds should be made as little as possible when pruning, and the inevitable wounds should be protected in time. Pay special attention to the methods of girdling, girdling and carving, and don't use them indiscriminately on the backbone branches. When thinning branches, try not to cause wounds and joint injuries on the backbone branches, so as not to weaken their branches too much and even cause the whole tree to die.

Severe injury reaction of red star apple tree

(1) Scissors were infected with lobular disease, and the tree vigor was weakened. (2) Infected with pests and diseases after girdling, and the upper part is dry. (3) Thinning will damage the upper shaft.