How to gird the grapevine?

Ring circumcision that is ring peeling, in the grape vines with a knife horizontally cut the bark into a double ring, and peel off a complete circle of skin (do not hurt the xylem, girdling width is generally about 3 to 5 mm), and then completely Blocking the transport of nutrients down the branches, adding nutrients and hormonal accumulation of assimilation above the ring, strengthening the nutrition of its organs, especially inflorescences and ears, in order to reach the promotion of fruit set, increase fruit size and/or early seasoning The role.

Ringing area:

In general, girdling can be performed on new shoots (fruiting branches), fruiting branches, main vines, or on the backbone. But in the results of girdling (width of about 3 to 4 mm), due to tender and crisp new shoots. In the perennial main vine or short girdling, due to the appearance of irregular, rough skin, etc. is also more difficult to carry out, and the wound is not easy to heal. Therefore, it is the backbone and the results of the mother girdling that are used more in the production. Ringing on the backbone will affect the entire plant, and girdling on the maternal branches will only affect the part above the ring. The girdling has a considerable use in the production of grapes in some countries.

Circumvention intentions and times

(1) Promoting fruit setting In most cases, the unfertilized flowers in the inflorescence will fall off quickly after the grape has bloomed, or they will form giant fruit (pollination but not fertilization). Under the influence of girdling and strengthening nutrition, it can promote unfertilized flowers to set fruit, reduce fruit drop, and then increase the panicle weight and output value. For this reason, girdling should be carried out immediately after flowering or immediately after flowering.

(2) The increase of fruit size is mainly used in non-nucleation white and other non-nucleated species, and the girdling effect on nucleated species is small. During the circumcision period, based on the experience of California, it should be carried out immediately after the fruitlessness of the non-nuclear species ceased. At this moment, the peel skin is agile and the fruit grows quickly. When the anaesthesia is postponed, the effect of increasing the fruit size decreases, and the later the ringing is, the smaller the effect is. (3) Early experience in girdling can promote the coloration of fruits with nucleus species and accelerate maturation, such as redness, red Malaga, Ribier, etc., but this is ineffective for non-nuclear species. According to California experience, circumcision should be done at the very beginning of the exercise.

When girdling, please pay attention to the following points:

1 The circumcision period should be appropriate. Different moments of circumcision are different, but grape girdling can not be later than the middle of July, so as to prevent normal circumcision from healing before entering the winter.

2 The width of girdling should be suitable, and the width of girdling of grape branches depends on the thickness of the twigs. Generally, the girdling width should be within the width of the healing that can be completed in the year.

3 Generally, the result is a gimmick target. It is not appropriate to carry out girdling on the main vine. Regarding the selection of an updated species, the girdling leaves are left as tail branches, and for the selection of the two newer species, girdling is only performed on the result branch and cannot be girdled on the preparation branch.

4 Circumcision is only applicable to plants that grow and thrive, and circumcision should not be avoided for plants that are too weak and too thin and branches are too thin.

5 Circumcision only affects the transportation direction of nutrition. The harvest and high quality of grapes cannot be reached by only one girdling skill. It is necessary to cooperate with other agricultural skills measures to reach the intended intention.

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