In July, grapes enter the fruit enlargement stage and gradually begin to mature. The period one month before harvest is crucial for achieving high quality and yield. Effective management of fertilization and irrigation is essential during this time.
Timely fertilization is important, with nutrient supply typically applied once during the early stages of fruit coloring. This phase should focus on phosphorus and potassium-rich fertilizers. A triple-element compound fertilizer containing potassium sulfate can be applied to the soil, or it can be used as a foliar spray along with pest control treatments. Spraying with a 0.5% to 1% solution of potassium dihydrogen phosphate is also recommended, and this can be done up to three times. To enhance the storage capacity of grape berries, calcium-based foliar fertilizers such as Tricor Calcium Treasure (diluted 1000–1200 times) can be sprayed continuously in the month before harvest. This significantly increases the calcium content in the grapes, improving both quality and storability, while also helping to reduce the risk of cracking.
Water management should be carefully controlled in the month before harvest to ensure consistent quality. Excessive irrigation must be avoided, as it can lead to a decline in fruit quality. Before heavy rains, special attention should be given to flood prevention. For varieties that are prone to cracking, practices like mulching or covering with grass can help maintain even soil moisture levels, reducing the risk of damage and ensuring better fruit development.
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