2. Look at the amount of buds: the amount of buds is large, the amount of pruning is large, and the degree is appropriately aggravated. Strictly control the ratio of flower buds to leaf buds at around 1:20; Young trees with few buds leave more flowers; Branches and branch groups without flower buds are pruned again to update the bearing branch groups.
3, look at the tree potential: strong trees are lightly cut, straight and strong, and stay aside to promote the formation of flower buds; Re-cutting down weak trees, removing weak branches and renewing weak old branches;
4. Look at varieties: varieties with strong budding ability and strong branching ability, such as Red Fuji and Guoguang, should be thinned more and cut less, maintain moderate branching, adjust branching density, promote the growth of branch buds and flower buds at the back of cuttings, and reduce nutrient consumption and fruit in different years. In the young tree stage, the strong and competitive branches and upright branches on the back are mainly thinned.
Extended data:
Growth habit
Apple is a deciduous tree with strong polarity, usually vigorous growth and high crown. The height of the tree can reach 15 meters, and it is generally about 3 ~ 5 meters under cultivation conditions. The trunk is grayish brown, the old bark has irregular longitudinal cracks or flaking, and the branchlets are smooth.
Fruit is a kind of kernel, and its color and size vary with varieties. Like light, like slightly acidic to neutral soil. It is most suitable for sandy soil with deep soil layer, rich organic matter and good ventilation and drainage.
Apple trees begin to bear fruit 2 ~ 3 years after planting. Under general management conditions, the economic life is 15 ~ 50 years, and the poor soil and extensive management are only 20 ~ 30 years. Due to the comprehensive effect of apical dominance and bud heterogeneity, apple has strong dryness and obvious stratification.