The symptoms of potassium deficiency in nectarine are that the leaves turn upwards and become light green in the middle period, and then gradually increase from the bottom leaves to the parietal lobe. When potassium is severely depleted, the main veins of the old leaves close to shrinkage, necrosis occurs at the leaf margins or near the leaf margins, forming irregular edges and perforations. With the emergence of leaf symptoms, new and slightly thinning, reduced flower buds, small fruit and early fall. Wenzhou Celecare Medical Instruments Co.,Ltd , https://www.celecaremed.com
Control methods 1. In Taoyuan, there is a lack of potassium. In addition to the low potassium content in the soil, other elements lack or interact with each other and can also cause potassium deficiency. Therefore, in order to avoid shortage of potassium, organic fertilizer should be added. 2. From June to July, fertilizers such as plant ash, potassium chloride or potassium sulfate can be applied. The potassium content in the tree will increase rapidly, and the leaves and fruit may return to normal. 3. Based on the age of the tree, apply 0.45 kg to 2.7 kg of potassium chloride per tree.