Potassium fertilizer applied to apple trees

The timely and appropriate application of potash fertilizer can significantly increase fruit size, increase sugar content, increase coloring degree, and can also improve the intrinsic quality of fruit color, smooth skin and flavor. Absorption of potassium by apple trees is generally from early July to early August. During this time, appropriate amount of potash fertilizer is applied to the fruit trees, which will have a multiplier effect. If the same amount of potash fertilizer is applied before early spring or flowering period, it will have no obvious effect on the yield or coloring degree. The application rate may be one kilogram of pure potassium per 100 kilograms of output. Excessive application, instead, will destroy the physiological function of fruit trees and affect the absorption and utilization of other elements. Excessive application of potassium in apple trees shows magnesium deficiency, and the calcium content in the tree is relatively low.

In addition, when potassium fertilizers are used, potassium sulfate should be used with high absorption and utilization efficiency, followed by potassium chloride, and organic fertilizers with high potassium content, such as grass ash or decomposed chicken manure, should be applied under the trees. , and then shallow watering. If you use 0.3% ~ 0.5% potassium dihydrogen phosphate solution or amino acid potassium 300 ~ 500 times foliar spray supplement, you can also receive better results.

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