Importance of Potassium Fulvate in Grape Growth
Grape needs a large amount of potassium, which is known as a potassium crop. Appropriate application of potassium fertilizer plays an important role in promoting the coloring and ripening of berries. It can increase the sugar content and flavor, promote root growth and branch ripening, and enhance the ability of the plant to resist cold and drought.
When grapes lack potassium, yellow spots appear in the veins and margins of the leaves, which develop into a scorched state. When potassium deficiency is severe, the fruit stems turn brown, the fruit grains atrophy and soften, and the sugar content decreases. When potassium is too much, it inhibits the absorption of nitrogen and magnesium, and affects the growth and photosynthesis of branches and vines, resulting in reduced production and magnesium deficiency.
After the grape began to be colored, the application of potassium fertilizer or leaf spraying had obvious effects on coloring and sugar increase. Grapes are more sensitive to chloride ions, and MKP, potassium sulfate, or potassium nitrate is more effective than potassium chloride.
The main function of potash fertilizer is to make straw and stalk become strong. As far as grape production is concerned, as long as the plant grows vigorously and strongly, the fruit quantity is large and the fruit grain is large. The grape is a potassium-loving plant.
For every 100 grams of grape berries, 0.25 ~ 0.75 grams of pure nitrogen, 0.25 ~ 0.75 grams of phosphorus, and 0.35 ~ 1.1 grams of potassium are required, which are significantly higher than other fruit trees. The demand for potassium in grapes exceeds that of nitrogen and phosphorus, and more potassium is needed throughout the growing season, especially from the separation of the inflorescence to the ripening of berries. The absorption of nitrogen was the highest before flowering and flowering, while the absorption of phosphorus was the highest when inflorescence was separated from flowering.
Under the condition of potassium deficiency and compared with that without potassium application, the yield increased by 12.5% ~ 16.8%, the sugar content increased from 13.4% to 17.8%, and the color was good, the weight of single fruit increased obviously, and the main disease of grape, such as anthrax and black pox, was significantly inhibited.
For grapes, a high-quality mineral source potassium fulvate is very appropriate. In addition to the more than 12% organic potassium rich in the product itself, it can also promote the growth of grape roots, better absorb fertilizer and potassium around the plant, and improve the utilization rate of potash and other fertilizers, to meet the needs of grape plants for potassium throughout the growth cycle.