1. Why do grapes need to be sprouts?
Grape winter bud is a complex mixed bud. A bud often contains a main bud and 3-8 preliminary buds. When the buds begin to germinate, they will grow more than 2 buds of varying sizes on the same bud position. These buds compete with each other for nutrients in the later stages of growth, and eventually a lot of crooked melons and split dates will appear.
In addition, there is also a kind of "hidden bud". The budding position has no fixed position, and the branches that grow from these bud positions often do not have inflorescences, and it is difficult to be used without control. Grapes are fruit trees that require strong light, and good ventilation and light conditions can ensure their good growth. This is why the production uses rack cultivation. Therefore, sprouts are carried out in spring to prevent too many new plants from growing aimlessly on the trellis, which will affect the ventilation and light transmission performance.
2. When will the grapes begin to sprout?
When it comes to wiping buds, it is often understood as wiping buds when winter buds sprout and grow tender green shoots. In fact, the inflorescences can only be seen after the grapes have grown 4-5 leaves, so the grape buds need to wait until the number and size of the inflorescences can be distinguished. Based on this, grape sprouts are generally carried out when there are inflorescences on the new stalks and the size is visible, and the new stalks are about 10 cm in length, and this agricultural operation should be completed as soon as possible.
Note: Grapes cultivated in greenhouses can generally be considered to control temperature, humidity and other climatic environmental conditions, so the specific time for sprouts should be determined based on the phenological period and growth conditions at that time.
3. How to wipe the buds of grapes?
Spring buds are generally carried out on the main branch and lateral branches. Specifically, it is: wipe off 3 of the 5 adjacent buds that grow on the main branch, and only keep the two buds as the resultant branches of the year; If there were 3 bud eyes and 3 buds on the branches that were short-cut last winter, the lower 2 should be erased, and only the top one should be kept as the fruiting branch. If there are many buds, you can leave one bud every 30 cm apart.
4. Matters needing attention in grape sprouts
First, the sprouts should follow the principle of "four less, four more, four attention", that is, the land is thin, the fertility is poor, the tree is weak, and the shelf is small, so you should stay less; on the contrary, the land should be strong, the supply of fertilizer and water is sufficient, and the tree is strong Keep more plants occupying a large shelf; four attention: pay attention to whether the new leaves are evenly distributed, pay attention to the proportion of branches and fruits, pay attention to filling in the vacancies, and pay attention to the selection of sprouting tillers. Secondly, when wiping the buds, try not to break it hard with your hands. This will easily cause larger wounds. Use sharp scissors to cut off the base of the new shoots. When wiping the buds, do not operate blindly. It should be based on the load, yield and quality of the plant. The relative relationship between them.
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