1. In the early and middle stages of fruit growth, pay attention to spraying water or water to maintain a certain water content (about 60%). In the dry period, especially in the dry period after the rainy season, it is necessary to fill the water in time. Thus, the dermal pores of the secondary epidermal cell wall and the fruit stem are significantly developed, which can increase the critical swell pressure causing the cracked fruit.
2. The vineyard covers the mulch. Covering the mulch on the one hand can prevent the root system from excessive water absorption after rain; on the other hand, it can inhibit soil water evaporation, reduce soil moisture changes, and maintain water balance.
3. Improve cultivation management. Strengthen cultivation management to ensure that when the tree is strong, the summer shear should be strengthened to make the ear distribution reasonable and not to rub against the branches and leaves. At the same time, create good conditions for coloring.
4. Interplanting and weeding. Cultivating can eliminate weeds and reduce the occurrence of pests and diseases. At the same time, it can loosen the soil, have the ability to dry up, and can dry and regulate the soil water content. Generally, it should be ploughed once in 10~15 days, and should be cultivated in time after rain.
5. Improve soil structure and reduce soil moisture changes. It is necessary to go through the open channel and try to improve the drainage work; and increase the permeability of the soil by ploughing and applying organic fertilizer to reduce the change of soil moisture.
6. Calcium supplementation: Apply appropriate amount of nitrogen fertilizer, increase phosphorus and potassium fertilizer, apply more organic fertilizer, and increase the amount of calcium fertilizer applied to the soil.
7. Adjust the amount of results. Grapes with poorly colored grapes have a lot of cracking fruit. Therefore, it is necessary to adjust the amount of results and reduce the cracking of the fruit by thinning the ears, sizing the grains, and cutting the tips of the stalks.
8. Change the traditional topping method and leave more leaves. All the leaf tips above the ear are left with 2 leaves, and all the winter buds and summer buds between the leaves of the secondary shoots are removed. It can reach 20~25 pieces of normal leaves per fruit branch, and enhance the function of tree body to regulate water.
9. The shelf is covered with a canopy, or the ears are bagged and protected from rain. When the grape fruit directly absorbs rainwater or absorbs water from the roots, the fruit swells and causes cracking. Studies have shown that the fruit is bagged at the near maturity to prevent the skin from absorbing water, which can significantly reduce the rate of fruit cracking.
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