In July, the grape is in the period of fruit enlargement and gradually matures. Within one month before harvest, it is a critical period for obtaining high quality and high yield. We must effectively grasp the management of fertilizer and water.
1. Timely fertilization, supply nutrients. Generally in the early stage of fruit coloring topdressing once, mainly phosphorus and potassium fertilizers. Potassium sulphate three-element compound fertilizer can be used for soil application; it can also be sprayed by combining the prevention of pests and diseases by extra-root fertilizer, increasing the nutrition of leaves and fruits, and optionally commissioning 0.5%-1% potassium dihydrogen phosphate solution, etc. 2-3 times. In order to improve the storage tolerance of grape berries, calcium calcinate fertilizer (such as Tricor calcium treasure 1000-1200 times) can be sprayed continuously within one month before harvest, which can significantly increase the calcium content of grape berries, thus Improve grape quality and calcium storage, also have a certain role in the prevention of cracking.
2. Strengthen water management. In order to guarantee the quality of the grapes, it is required to strictly control the irrigation within one month before the harvest to prevent the quality from decreasing. Before the advent of heavy rain, special attention should be paid to the prevention of flooding. For varieties that are prone to cracking, try to adopt measures such as mulching and covering grass to maintain a balanced supply of soil moisture.
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