When is the best time to apply potassium fertilizer to apple trees?
When is the best time to apply potassium fertilizer to apple trees? What is the purpose of applying potassium fertilizer to apples? Applying potassium fertilizer to apple trees at the right time and in the right amount can significantly increase fruit size, raise sugar content, improve coloring, and also make the fruit color vivid, the skin smooth and clean, and improve internal qualities such as flavor and taste. The uptake of potassium by apple trees is generally from early July...
When is the best time to apply potassium fertilizer to apple trees? What is the purpose of applying potassium fertilizer to apples?
Applying potassium fertilizer to apple trees at the right time and in the right amount can significantly increase fruit size, raise sugar content, improve coloring, and also make the fruit color vivid, the skin smooth and clean, and improve internal qualities such as flavor and taste. The uptake of potassium by apple trees is generally from early July to early August, and applying an appropriate amount of potassium fertilizer to the trees during this period will achieve twice the result with half the effort. If the same amount of potassium fertilizer is applied in early spring or before the flowering period, there will be no obvious effect on either yield or coloring. The application rate can be suitably set at 1 kg of pure potassium per 100 kg of yield. If applied excessively, it will instead damage the physiological functions of the fruit trees and affect the absorption and utilization of other elements. Excessive application of potassium fertilizer to apple trees shows symptoms of magnesium deficiency, and the calcium content in the tree body will also be relatively reduced.
In addition, when applying potassium fertilizer, potassium sulfate, which has high absorption and utilization efficiency and obvious effects, should be selected as suitable; next is potassium chloride. Organic fertilizers with relatively high potassium content, such as plant ash or decomposed chicken manure, can also be broadcast under the trees, then shallowly buried and watered. If a 0.3%-0.5% potassium dihydrogen phosphate solution or a 300-500 times dilution of amino acid potassium is used for foliar spraying as a supplement, relatively good results can also be achieved.
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