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Reasonable retention of buds is the basis for promoting high yield and quality of grapes. The winter pruning of grapes depends on the variety, the result habits, the planting density, the pruning form, etc. For example, Kyoho is a large-grained grape with a target of producing 2,000 kilograms of grapes. Generally, 4 kilograms of fruit are guaranteed for 1 kilogram, and 0.8-1 million winter buds need to be preserved. According to the results of the three methods of pruning the mother branch, short shoots should be left 2-3 buds, leaving 4-7 buds in the tip trimming, 8-12 shoots left long shoots. Three kinds of pruning methods need to retain the results of the mother branches are: 4000-5000, 2000-2500, 830-1000. For short- and mid-tip pruning of budding, fruitful varieties, and densely planted and fenced plants, pruning of medium and long shoots is recommended for varieties with weak germination power and poor performance, as well as for cultivation of thin plants and scaffolds. Mainly. Relatively speaking, for vigorous tree vigor, thick mother buds, and full shoots, buds can be properly maintained. In general, 12-15 buds need to be kept per square meter. For excess dense branches, thin and thin branches, branches and branches, dead branches and immature branches, all of them shall be thinly cut from the base, and the rest shall be shortened as required.
The large-grain grape varieties such as pruning Jufeng have been updated. As a result, the branch has a short survival period and the tree vigor is aging. Therefore, the pruning must be updated in time. First, the results of the renewal of branches and branches, to produce bald senile branches should be heavy short cut, and promote the basal bud burgeoning. The second is the renewal of the plant. The perennial old vine on the backbone of the aging plant is cut off from the base to promote the germination of the bud on the main vine, and a robust sprout is selected to cultivate the vine to restore the vigorous result.
Precautions It is important to maintain a balanced distribution of the resulting mother branches on the rack surface, with good lighting. For the resulting mother branches cut from the 2-3 cm section of the cut, the clippings should not be too close to the buds, so as not to cause clipping buds to die, and ensure that there are 2-5 robust and full shoots under each trimming of the mother branches. Pruning is too late. If you are injured, you should trim the edges with a thin film to prevent dead branches.
Winter shearing time is usually carried out one month before natural fall-leaf to next spring-induced injury flow (cut out of mucus), and is best done from December to the Spring Festival.