Water and fertilizer management of Chunhong No.3 grape

1. Pregermination fertilizer is applied before grape germination, mainly nitrogen fertilizer.

2. Expansive fertilizer should be applied when the grape fruit is big enough to be mung beans and peas. This time, the amount of fertilization is large, accounting for about 50% of the annual fertilization.

3. Potassium sulfate should be applied 20-30 days before the grapes are ripe, and it should be applied 1 time when the grapes begin to soften but have not been colored.

4. "Monthly fertilizer" should be applied immediately after the grapes are harvested. We generally apply fertilizer every month according to the standard of 667m2 (mu) 15ks urea.

5. The traditional method of overwintering fertilizer is to apply it during the dormant period of grapes. In recent years, it is advocated to apply it in August-September. This time, farmyard manure is the main fertilizer, and calcium fertilizer and a small amount of ternary fertilizer are also needed.

Fertilizer and water management in vineyards is very important because it is related to the growth, yield and quality of trees and affects the next year.