Shelving grape pruning technology

Shelving grapes are often pruned using the "keel" method. This method can maintain a good ventilation and light transmission, strengthen the top edge, and make the tree robust, achieve the purpose of high quality and stable production. First, the main vine leaves and cuts are more suitable for single bevel small scaffolds, with the frame facing southwards. The Mugna grape grows more vigorously. According to its characteristics of high temperature and sunlight, the tilt angle is 25-40 degrees, the height of the front frame is about 1.2 meters, the height of the rear frame is about 2 meters, the row spacing is about 6 meters, and the plant spacing is 1.5-2 meters. 4 to 5 meters wide, leaving 3 to 4 main vines per plant, with 50 to 70 seedlings per acre (667 square meters). The grapes are well exposed to sunlight and have a large relative area, which is beneficial to photosynthesis and ventilation. It facilitates the mechanization of weeding, fertilization, and loose soil in the frame, so that the main vine spreads evenly over the surface of the frame. Second, the results of the mother branch of the shear and retention The mother branch of the shear and retention directly affect the quality and yield of grapes. Large amount of leaves, large plant load, densely crowded branches and leaves, poor light and ventilation, small grains, and poor quality; The amount of leaved plants is determined according to the character and growth of the plants. Generally, one branch is left every 25 centimeters on the main vine first wire, leaving 1 to 2 mother branches in each group. During pruning in winter, the main vine height is strictly controlled under the first wire, cut thin, weak, diseased branches, including cross-branches, and keep the balance between the main vines in order to form the largest area of ​​results. Third, the results of the mother branch of the length of the results of the trimming of the mother branches are divided into long and short shoots, short shoots left to 2 to 4 sections, leaving the tip of pruning to leave 6 or so, long tip pruning left about 10 sections. According to the quality, branch thickness maturity, pruning form, fertilizer and water conditions and management level to determine the length of stay. Generally, the seed-setting rate is higher in the 4-7th section, and the seed-setting rate of the subsequent nodes is poor. The pruning method based on the middle and long shoots may be used. The branches of the main vines underneath the grape vines were all cut off to facilitate ventilation. The vines on top of the main vines were exposed to sunlight, and the fruit surface was dark in color and rust-coloured. The skin was thick and ugly, and the tannin content was high. Astringent, affects the overall quality of the grapes. Fourth, the results outside the site to leave the reserve branch and the results of the mother to form a fixed branch group, for the main vines bald phenomenon, can be selected in advance from the root sprout leaves a robust shoot to do a ranch short cut, according to the thickness of the vines can stay Sections 4-8 are short cuts. In the following year, after the long-resulting masterbatch completes the task, it can be removed. The 2 to 3 new shoots issued on the ready-to-shoot will be trimmed by the middle and long shoots, leaving the result as the parent. . Two or three of the new shoots still remain on the lower part of the shoot, and as a preparation for branch clipping, the third year is trimmed according to this method.

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