Different varieties of grapes are picked in time and in batches, and the maturity period is also inconsistent. Different measures should be taken according to different situations when picking. The ripe grapes are shiny, the flesh is transparent, and there is a thick layer of powder cream. The food has a flavor and the seeds are brown. If the picking is too early, the acidity is too high, which affects the quality. If the picking is too late, the fruit tastes light and is not resistant to storage and transportation. Therefore, timely picking and batching are the key to ensuring the quality of the grapes. It is most suitable for picking after drying in the morning on a sunny day.
Pay attention to drought prevention and cooling in the picking stage. In case of long-term high temperature or no rain, the fruits and leaves are easy to shrink, affecting plant growth and flower bud differentiation. Therefore, it is possible to use the inter-row grass to reduce the ground temperature, and at the same time pay attention to timely and appropriate irrigation. The irrigation should adopt the annular furrow irrigation method, that is, digging a wide ditch outside the canopy to pour water into it.
Appropriate application of the "harvesting" fat grape ripening stage is the second peak period of its root growth, and should be fertilized in time. The amount of fertilization accounts for 60% of the total fertilization in the whole year; the fertilizer is preferably organic fertilizer such as manure, compost, and pond mud. At the same time, some urea, ammonium bicarbonate and other quick-acting fertilizers are added. It is required to apply 3000-4000 kg of organic fertilizer per acre of vineyard, mix 30-40 kg of urea or 100-130 kg of ammonium bicarbonate, apply chemical fertilizer first, then apply organic fertilizer, then cover the soil, and timely fill the water after fertilization. In addition, trimming of the secondary shoots should be stopped during the ripening period.
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