In winter pruning of apple trees, the degree of pruning and the amount of pruning are determined according to the condition of the tree body, natural conditions, and site conditions. Generally, “five observations and four attentions†are to be achieved. Five look 1. Look at the age of the trees. Saplings and early fruit trees should have a small amount of pruning, and the degree of pruning should be light. Attention should be paid to the cultivation of tree types and fruiting branches. In the fruit period, trees should be properly cut and the rotation should be taken care of; the senescent tree should be cut and renewed. . 2. Look at the amount of flower buds. The amount of fruit trees with a large amount of flower buds should be larger and the degree of pruning should be increased. Strictly control the total amount of flower buds and the proportion of flowers and leaf buds, and the ratio of flowers and leaf buds is generally 1:20. For young trees with fewer flower buds, flower buds should be lightly cut, and branches and branches without flower buds should be renewed. 3. Look at the tree. Strong wang trees should be lightly trimmed to stand upright and strong branches, leaving lateral branches and mean tree branches, in order to ease tree vigor, and then promote the formation of flower buds; weak trees to prune, cut off weak branches and drooping branches, update the aging results Zhizu group . 4. See variety characteristics. The varieties with strong sprouting ability and strong branching ability, such as Fuji and Guoguang, are likely to cause canopy closure, poor light in the inner canopy, and a large amount of pruning. 5. See cultivation management conditions. Trees with good soil, fertilizer, and water management, and trees with strong trees should be lightly pruned; on the contrary, trees with poor slopes and poor management should have more pruning, and the degree of pruning should be heavier and less sparse. Four attention 1. Do not wear hard-soled shoes during winter cuts, especially leather shoes, big shoes, and nail shoes. It is advisable to wear rubber shoes and cloth shoes. 2. When using artificial support, pulling branches and other methods to open the angle, you can not use too much force, too large, you must first take the branch to soften, so as not to fold and pull the branches. 3. To do so while cutting edge saws disinfection. Commonly used drugs are 10 times Guo Kangbao, 30 times liquid 9281 and 3 Baume degrees lime sulfur agent. 4. Cut off pests.
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