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With the appearance of leafy symptoms, new and slightly thinning, reduced flower buds, small fruit type and early fall.
Occurrence conditions 1 There are few soils with fine sandy soils, acidic soils, and organic matter, and it is easy to show potassium deficiency. Excessive application of potassium in the sandy soil can reduce the availability of potassium. It can be applied to soils with mild potassium deficiency. Nitrogen fertilizer stimulates the growth of fruit trees and is more likely to show potassium deficiency. 2 Potassium deficiency in fruit trees is prone to frost damage. However, magnesium deficiency is often caused by potassium. Excessive potassium may cause boron deficiency. When there are too many fruits, the content of potassium in the leaves will decrease. In July, the potassium content in leaves will be less than 1 %, you can see the symptoms of potassium deficiency.
ã€Treatment methods】1 The lack of potassium in peach orchards, in addition to the lack of potassium in the soil, the lack of other elements or interaction, can also cause potassium deficiency; To avoid potassium deficiency, organic fertilizer should be added. From 26 to July, fertilizers such as grass ash, potassium chloride, or potassium sulfate can be topped up, and the potassium content in the tree will increase rapidly, and the leaves and fruit may return to normal. 3 According to the age of the tree, apply 0.45 to 2.7 kg of potassium chloride to each tree.
Nectarine Physiological Diseases - Potassium Deficiency
Symptoms of potassium deficiency are characterized by upward roll-up of leaves, light green after mid-summer, and progressively severer bottom and parietal lobes. When potassium is severely depleted, the old leaf near the main vein collapses and necrosis occurs at the leaf margin or near the margin of the leaf, forming irregular edges and perforation.