(2) The pruning method adopted shall conform to the local natural conditions. In areas where the winter weather is cold and the temperature is low, and it is necessary to take off the frame and bury the soil for cold protection, the pruning method with multiple main vines and no trunk can be adopted; In areas where the temperature is high in winter and it is not necessary to bury the soil for cold protection, it is necessary to keep the trunk so that the vines are higher from the ground, which is conducive to ventilation and light transmission and reduces the breeding and spread of pests and diseases; In areas with strong light and high temperature, trunk can also be left to reduce the damage of ground radiation to branches, leaves and spikes; In areas with low ground temperature, in order to make full use of the ground radiation energy and improve the quality of berries, we can keep grape branches and vines closer to the ground without leaving the trunk to reduce the damage caused by low temperature.
(3) No matter what pruning method is adopted, it should be closely coordinated with cultivation and management techniques such as soil, fertilizer and water. Heavy load pruning can be used in areas with thick soil layer, good fertilizer and water conditions and high management technology level; On the contrary, a pruning method with less load is needed.
(4) Pruning methods should be different for different grape populations, varieties and types. For example, wine varieties require high sugar content in berries and low load pruning methods.