Before the fruit is ripened, it is differentiated according to the characteristics of the grape variety and the growth of the branches and leaves.
For example, “Jiufeng†grape is easy to fall and drop flowers. In the foliar fertilization formula, the nitrogen content should be controlled to highlight the application of phosphorus, potassium and boron. In view of the characteristics of fertilizer required during the expansion of berry grape, the supply of trace elements in addition to boron requires the addition of magnesium, calcium, iron and manganese.
The results of many years of experiments show that the grape in the berry coloring period, the root dressing with potassium as the main can enhance the color and increase the sugar content. It is recommended to spray 3 to 4 foliar fertilizers before fruiting, and spray the mixed foliar fertilizer containing phosphorus, potassium and a small amount of nitrogen and boron, magnesium and iron in the first two times. After 1 or 2 times, it is necessary to highlight potassium and Calcium levels, such as spraying 0.1% to 0.5% potassium dihydrogen phosphate solution. In the month before harvesting, 0.1% to 0.5% calcium nitrate or calcium chelate solution can be sprayed twice to improve the storage and transportation performance of the grapes.
Agricultural science and technology newspaper
For example, “Jiufeng†grape is easy to fall and drop flowers. In the foliar fertilization formula, the nitrogen content should be controlled to highlight the application of phosphorus, potassium and boron. In view of the characteristics of fertilizer required during the expansion of berry grape, the supply of trace elements in addition to boron requires the addition of magnesium, calcium, iron and manganese.
The results of many years of experiments show that the grape in the berry coloring period, the root dressing with potassium as the main can enhance the color and increase the sugar content. It is recommended to spray 3 to 4 foliar fertilizers before fruiting, and spray the mixed foliar fertilizer containing phosphorus, potassium and a small amount of nitrogen and boron, magnesium and iron in the first two times. After 1 or 2 times, it is necessary to highlight potassium and Calcium levels, such as spraying 0.1% to 0.5% potassium dihydrogen phosphate solution. In the month before harvesting, 0.1% to 0.5% calcium nitrate or calcium chelate solution can be sprayed twice to improve the storage and transportation performance of the grapes.
Agricultural science and technology newspaper
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