In the grape growing season, potassium fertilizer is mainly used for spraying fertilizers outside the roots because it has many advantages such as rapid absorption, good fertilizer effect, and timely supply. The combination of potassium spraying outside the root and preventing and controlling pests together can save labor.
The grape is a kind of fruit tree with good potassium. Under the condition of potassium deficiency, the yield of potassium is higher than that without potassium, the sugar content is high, and the coloration is good. The weight of single fruit is obviously increased. At the same time, the main diseases of grape (anthrax, blackpox) Disease, etc.) are significantly suppressed.
The selection of potash fertilizers has proved that the application of potash fertilizers outside the roots of grape should be performed with potassium phosphate, potassium sulfate, high-quality ash extracts, and other available potassium fertilizers.
The potassium spray outside the roots during the application period was mainly performed during the berry enlargement and berry ripening. Plants growing vigorously can also be sprayed when the young fruit after flowering begins to grow. While spraying potassium fertilizer, it is necessary to apply nitrogen and phosphorus fertilizers in order to ensure that potassium fertilizers can normally exert their fertilizer effects.
Select spraying time Potassium application outside the root should be carried out before 9 o'clock on the cloudy or sunny morning and after 5 o'clock in the afternoon. It should not be sprayed at high temperature in the noon.
Pay attention to spraying techniques Potash fertilizer is applied outside the roots of the grapes. Both sides of the leaves must be sprayed evenly.
After the other potassium-applying methods were adopted, appropriate amount of potash fertilizer was applied in combination with autumn basal fertilizer.
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