Management technology of grape color conversion period

Grape is a very popular fruit, and the market demand in our country is very great. Especially varieties such as sapphire grape, Jufeng grape and so on. The planting area is very large, so when planting grapes, we should reasonably adjust the management methods according to the growth period of grapes. So how to manage it during the grape color conversion period? The following editor brings you the management technology of grape color conversion period, let's have a look!

1. Water management

The color conversion period of grapes is an important period for fruit sweetening, so if you want to improve the sweetness of grapes, you must first reduce the moisture in the field. During the period from grape expansion to color conversion, the water demand of grape fruit mainly decreased. Therefore, during the grape color conversion period, we should reduce the amount of water and promote the grape fruit to change color and mature. Do a good job in field drainage, if it is in the rainy season, then we should pay more attention to it. But it is also necessary to maintain a certain amount of moisture, otherwise it will also affect the sugar content and color change, and keep the soil moist.

2. Rational fertilization

When the grape enters the initial stage of changing color, the demand for nutrition increases, so at this time we have to provide adequate nutrition for the grape through fertilization. Improve the quality of berries and promote fruit ripening. However, we should pay attention to the type and amount of fertilizer, especially nitrogen fertilizer should not be used too much, fertilizer should be based on phosphorus and potassium fertilizer. And it should be adjusted reasonably according to the planting variety, if it is a mid-late maturing variety. Then it is also a critical period for the expansion of young fruit, when a small amount of topdressing promotes the expansion of young fruit. It can also enhance the quality and storage capacity of grapes and reduce the phenomenon of fruit cracking.

3. Foliar fertilization

In the grape color conversion period, we also need to properly spray foliar fertilizer. This can effectively improve the volume and weight of berries, sugar content and coloring degree. Ensure that the fruit can grow neatly and try to keep the fruit ripening at the same time. And it can also effectively control diseases and insect pests, and the storability of grapes will be improved. When spraying foliar fertilizer, it should be in windless, cloudy days and other weather, and must not be carried out at noon on a sunny day. And foliar fertilizer can only play a supplement for grapes, can not completely replace foliar fertilizer, so when spraying foliar fertilizer, we should take soil fertilization as the premise.

4. Promote color change

After entering the color conversion period, the grapes should be properly unbagged to provide sufficient light for the fruit. Then the old leaves and yellow leaves around the fruit should be removed to avoid blocking the sun of the fruit, so that the grape ear can receive light evenly. When the grape changes color, it needs a substance of anthocyanin, and the sugar produced by photosynthesis is the main substance for the synthesis of anthocyanin. Therefore, we should also do a good job in the protection of healthy leaves. Finally, the growth regulator should be used reasonably, mainly ethephon, but the concentration should be controlled and the trial should be carried out in a small area first.

The above is a brief introduction to the management technology of grape color conversion period. The management of grape color conversion period is very important, which directly affects the quality and yield of grape fruit. So we must pay more attention to it. That's all for today's introduction. This article is for reference only. I hope it can help you all.