Before the grapes are harvested, the calcium can increase the calcium content of the grapes, increase the quality and yield of the grapes, and increase the economic benefits.
Practice: In the period of 1 month to 10 days before the grape is harvested, calcium can be sprayed during this period of time. During the ripening period of grape berries, the earlier the calcium spraying time, the easier it is to absorb and the spraying concentration can be relatively lower; the closer to the harvesting period, the higher the concentration should be. One month before harvesting, the concentration of calcium sprayed was 1%, and the calcium spray before harvesting was 1.5%. Spraying calcium on the leaf surface of the grapes has better effect before 10 o'clock in the morning and in the evening. In sunny days with high temperature, the concentration of calcium sprayed is smaller. After spraying calcium, it will rain within 8 hours, and the rain will be fine after spraying.
Practice: In the period of 1 month to 10 days before the grape is harvested, calcium can be sprayed during this period of time. During the ripening period of grape berries, the earlier the calcium spraying time, the easier it is to absorb and the spraying concentration can be relatively lower; the closer to the harvesting period, the higher the concentration should be. One month before harvesting, the concentration of calcium sprayed was 1%, and the calcium spray before harvesting was 1.5%. Spraying calcium on the leaf surface of the grapes has better effect before 10 o'clock in the morning and in the evening. In sunny days with high temperature, the concentration of calcium sprayed is smaller. After spraying calcium, it will rain within 8 hours, and the rain will be fine after spraying.
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