How to prevent and control potassium deficiency in pear trees

When the villagers reflected the pear orchard in a mountain village, they found that the branches of some pear trees were shortened, their leaves became smaller and yellowish green, and their leaf edges curled, browned and scorched. In serious cases, the whole leaves were like this, like burning, especially in the trees with barren land and bare roots, which affected the tree potential and yield. Many fruit growers don't know what's going on, thinking it's a drug damage or a disease such as leaf spot. In fact, this is a typical physiological disease caused by serious potassium deficiency. Because in the pear orchard, fruit growers interplant a large number of potassium crops such as sweet potato, peanut and yellow tobacco for a long time, but pay more attention to nitrogen and phosphorus fertilizer while ignoring the application of potassium fertilizer, which results in a serious lack of potassium in pear trees and shows the above symptoms. The following measures must be taken: timely spraying 0.3% 0.5% potassium dihydrogen phosphate and urea mixture 2 times, replenish nutrition as soon as possible and restore the tree potential. Topdressing to ensure strong and timely topdressing quick-acting fertilizers such as potassium dihydrogen phosphate and urea, combined with multi-component and long-acting compound fertilizers such as special fertilizer for fruit trees, to ensure the healthy growth of plants. Fruit thinning reduces consumption and removes some fruits, reduces nutritional consumption, and promotes vegetative growth. Change old habits and change the habit of long-term intercropping of crops that require a lot of potassium.