Summer apple tree potassium fertilizer is at the time

The absorption of potassium by apple trees is generally from early July to early August. During this time, the appropriate amount of potassium fertilizer is applied to the fruit trees, which can significantly increase the fruit, increase the sugar content, increase the coloration, and make the fruit color bright. The inner quality of the peel is smooth and the taste is improved. If the same amount of potash is applied before early spring or flowering, there will be no obvious effect on the yield or the degree of coloration. The application rate is preferably one kilogram of pure potassium per 100 kilograms of production. If the application is excessive, the physiological function of the fruit tree will be destroyed, which will affect the absorption and utilization of other elements. Excessive potassium application in apple trees shows magnesium deficiency, and the calcium content in the tree is also relatively reduced.

In addition, when applying potassium fertilizer, potassium sulfate with high absorption efficiency and obvious effect should be selected, followed by potassium chloride, or organic fertilizer with high potassium content such as grass ash or decomposed chicken manure can be applied under the tree. Then shallowly watering. If the leaf surface spray is supplemented with 0.3% to 0.5% potassium dihydrogen phosphate solution or amino acid potassium 300-500 times solution, good results can also be obtained.

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