Symptoms of potassium deficiency are characterized by upward roll-up of the leaf, light green after mid-summer, and progressively worsening from the bottom 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 margins of the leaves, forming irregular edges and perforations.
With the emergence of leaf symptoms, new and slightly thinner, less flower buds, small fruit and early fall.
Occurrence conditions
1In soils with small sandy soils, acidic soils, and organic matter, there are few soils, and it is easy to show potassium deficiency. Too much in sandy soil can reduce the availability of potassium. When nitrogen fertilizer is applied to mild potassium-depleted soil, it stimulates Fruit trees grow more susceptible to potassium deficiency.
2 Potassium deficiency in fruit trees is prone to frost damage, but it often causes magnesium deficiency after potassium is applied. Excessive potassium may cause boron deficiency. When there are too many fruits, potassium content in leaves will decrease. In July, the potassium content in leaves will be less than 1 %, you can see the symptoms of potassium deficiency.
Control methods
1 Potassium deficiency in Taoyuan, in addition to the lack of potassium in the soil, the remaining elements lack or interact with each other, can also cause potassium deficiency; To avoid potassium deficiency, organic fertilizer should be added.
From June 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 Based on the age of the tree, apply 0.45-2.7 kg of potassium chloride to each tree.
Beauty Tools,Best Beauty Tools,Beauty Care Tools,Hair Straightening Comb
Shenzhen Jie Zhong Lian Investment Co., Ltd. , https://www.szmeizons.com