In June, the growth of grapes has entered the berry swelling period. Fertilization during the fruit swelling period is particularly important. During this period, management should strengthen the supply of water and fertilizer to improve the yield and quality of grapes.

Scientific top dressing

During the rapid swelling of grape fruits, too much nitrogen is harmful and unhelpful, it can aggravate the occurrence of diseases, and at the same time reduce the coloring rate of the fruit and increase the cracking of the fruit.

According to the physiological and nutritional characteristics of the fruit during the expansion period, organic nutrition and inorganic nutrition are combined, a large number of elements are combined with medium and trace elements, and the combination of underground root flushing and above-ground leaf spraying can achieve the effect of expansion and coloring. The needs of nutrient elements during fruit expansion period can increase yield and improve quality.

Organic nutrient fertilizer can be mainly amino acids in the early stage of expansion, and humic acid or fulvic acid in the later stage; in the three elements of nitrogen, phosphorus, and potassium, potassium can account for 50%-60% of the total, and phosphorus can account for 20%-30%, nitrogen can account for 10%-20% of the total, and calcium can account for 10%-20%. It is also important to supplement some trace elements of magnesium, zinc, boron, iron, copper, molybdenum and rare earth elements; Foliar spraying can be a foliar fertilizer that contains mainly potassium and also contains phosphorus, calcium, and magnesium. While fertilizing with flushing, adding some fungus fertilizers will be icing on the cake.

In addition, recent studies have found that organic silicon can coordinate the balance of nitrogen and phosphorus, potassium and other elements in plants, so that plants can grow steadily, prevent fruit cracking and sunburn, increase fruit powder, and enhance plant disease resistance. During the swelling period, it is also necessary to replenish silicon in a timely manner.

Water in time

The grape swelling period is the peak of water demand, and watering must be timely. At this time, the lack of water will seriously affect the fruit swelling. To ensure sufficient water, to promote fruit swelling. As long as it doesn't rain, water it every few days until the berries become soft and start to color. Irrigate small water after fertilization, but not in heavy rain, and drain water in time. In order to ensure the quality of the grapes, it is required to strictly control the irrigation within one month before harvest to prevent the quality from being reduced. Before heavy rain comes, special attention should be paid to drainage and waterlogging prevention. During the berry coloring period, stop watering to improve berry coloration and berry quality.

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