First, the site conditions of the vineyard. Different site conditions have different growth performance and results. In mountainous areas, hills or river beaches with poor soil, due to the thin soil layer, poor soil quality and low fertility, the annual growth of vines is generally small, the growth is generally weak, and the number of vines is also small. In addition to strengthening the comprehensive management of fertilizer and water, these vineyards should pay attention to less thinning and more pruning when pruning, and the pruning amount can be appropriately biased, and the yield should not be too high; Vineyards with thick soil layer, fertile soil, flat terrain and sufficient fertilizer and water have large annual growth of branches and vines, which are vigorous and healthy. When pruning, more branches can be thinned, less short branches can be cut, and the pruning amount should be light.

The second is the planting method and density. The vineyard has different site conditions, different frame and planting density, and different pruning methods. Scaffolding grapes, set dry and appropriate height; Hedge grapes, dry and low; In the cold winter, it is necessary to bury the grapes in a cold place, so it is convenient to bury the grapes without leaving the trunk; In order to obtain early high yield of grapes, the initial planting density should be large, and the amount of branches and vines should be large, and then transplanting or thinning should be carried out when the branches are closed.

The third is the level of management technology. It is difficult for vineyards with low management level, insufficient supply of fertilizer and water, weak growth of trees and small number of branches and vines to play the role of plastic pruning in increasing production. In order to pursue high yield, this vineyard will further weaken the tree vigor, cause premature senescence of the tree and shorten the fruiting period; If the management level is high, the trees are strong and the number of branches and vines is sufficient, we can give full play to the role of pruning in regulating and increasing production, and obtain high quality and high yield year after year.

The fourth is the variety characteristics. Different grape populations and varieties have different fruiting years and responses to pruning. Therefore, when pruning, different pruning methods should be adopted according to the growth and fruiting habits of different groups, varieties and racks in order to obtain ideal pruning effect.

The fifth is tree age and tree potential. The growth intensity of vines varies with the age of grapes: from young age to first fruit, they generally grow vigorously; After entering the full fruit stage, the growth gradually changed from vigorous to slow; After entering the aging period, the growth is getting weaker and weaker. According to this change law, young trees and trees at the early fruit stage should be lightly cut and more branches and vines should be left to promote rapid growth and early fruit; For the trees in full fruit period, the pruning amount should be appropriately increased to maintain high quality and stable yield; For aging trees, it is advisable to cut down, renew and rejuvenate again.

The sixth is the pruning reaction. Grapes with different populations, varieties and number of racks have different reactions to pruning. Judging pruning reaction can be considered from both local and global aspects. The local reaction is to judge the budding state and flower bud formation of local branches and vines according to thinning, cutting or other pruning methods; The overall judgment is based on the total growth of trees, the annual growth of new branches and vines, the fullness of branches and vines, the quantity and quality of fruit ears, and the size of fruit grains. Whether all kinds of pruning methods are used properly and whether the size and weight of pruning are appropriate can be judged and improved through the specific reactions of all kinds of pruning methods.