Does the lack of potassium fertilizer affect the fruit setting rate? Please talk about the symptoms of potassium fertilizer deficiency in fruit-bearing period?

Peach, plum, apricot, plum and cherry trees are prone to potassium deficiency, which is characterized by yellowing, wrinkling and curling of leaf edges and veins in the middle of new shoots, followed by reddish or purplish red leaves and scorching and necrosis of leaf edges. Branchlets are slender, with few flower buds. Fruits are few and small. When pear trees lack potassium, their leaves will curl forward.

When peach trees lack potassium, the leaves will curl to the middle of the veins, and the leaves will turn red and scorch. With the aggravation of potassium deficiency, the leaf curl will be more serious, the degree of leaf scorch will be aggravated, and the peach fruit will shrink.

Pears and apples are characterized by yellow or dark purple leaf edges in the middle and lower parts of new branches, shrinking and curling, and gradually expanding to the top. In severe cases, almost all leaves are reddish brown and dry, and the anxiety is particularly obvious. The withered and necrotic leaves do not fall off for a long time.

Potassium-deficient grape leaves turn yellow, with brown spots, gradually fall off, the elongation of new shoots is poor, and the fruit maturity is inconsistent. The ability to resist external pests and diseases will be reduced, and rot will often occur.