A Detailed Explanation of the Latest Management Techniques for Grape Veraison
Grapes are a very popular fruit, and the market demand for them in our country is very large. This is especially true for varieties such as Sapphire grapes and Kyoho grapes. Their planting areas are all very large. When growing grapes, we must reasonably adjust management methods according to the grape's growth stage. So how should management be carried out during the grape veraison period? Below, the editor brings you the management techniques for the grape veraison period. Let's take a look together!
1. Water management
The veraison period of grapes is an important period for the fruit to increase in sweetness. At this time, if you want to increase the sweetness of the grapes, then first you must reduce the moisture in the field. From the grape expansion period to the veraison period, the grape fruit's demand for water mainly declines. Therefore, during the grape veraison period, we should reduce the amount of watering to promote grape fruit coloring and ripening. Do a good job in field drainage. If it is during the rainy season, then pay even more attention. But a certain amount of moisture should also be maintained, otherwise it will also affect the sugar content and coloring. Keeping the soil moist is sufficient.
2. Reasonable fertilization
When grapes enter the early stage of veraison, their demand for nutrients increases, so at this time we should provide sufficient nutrients to the grapes through fertilization. Improve berry quality and promote fruit ripening. However, we should pay attention to the type and application amount of fertilizer. In particular, nitrogen fertilizer must not be applied excessively, and the fertilizer should be mainly phosphorus and potassium fertilizer. And reasonable adjustments should be made according to the planted variety. If it is a mid-to-late maturing variety, then this is also a key period for young fruit expansion. At this time, a small amount of topdressing promotes young fruit expansion. It can also enhance the quality and storage capacity of grapes and reduce fruit cracking.
3. Foliar fertilization
During the grape veraison period, we should also appropriately spray foliar fertilizer. This can effectively increase the volume and weight of the berries and improve the sugar content and coloring degree. Ensure that the fruit can grow uniformly and try to keep the fruit ripening time consistent. It can also effectively prevent and control diseases and pests, and the storage quality of grapes will also be improved as a result. When spraying foliar fertilizer, it should be done in windless, cloudy weather, and it must not be done at noon on a sunny day. Moreover, foliar fertilizer can only serve as a supplement for grapes and cannot completely replace soil fertilizer, so when spraying foliar fertilizer, soil fertilization should be taken as the prerequisite.
4. Promoting veraison
After grapes enter the veraison period, the bags should be appropriately opened to provide sufficient light for the fruit. Then the old leaves and yellow leaves around the fruit should be removed to avoid blocking sunlight from the fruit, so that the grape clusters can receive uniform light. When grapes are coloring, they need a substance called anthocyanin, and the sugar produced by photosynthesis is the main substance for synthesizing anthocyanin. Therefore, it is also necessary to protect healthy leaves well. Finally, growth regulators should be used reasonably, mainly ethephon, but the concentration must be well controlled, and small-area trials should be conducted first.
The above is a brief introduction to the management techniques for the grape veraison period. The management work during the grape veraison period is very important and directly affects the quality and yield of grape fruit. So everyone must pay more attention. That is all for today's introduction. This article is for reference only. We hope it can help everyone!