Zinc fertilizers commonly used in production include zinc sulfate, basic zinc sulfate, zinc oxide, zinc chloride, zinc carbonate, organic chelated zinc, and zinc-containing compound fertilizers. Zinc sulfate and organic chelated zinc are used more often. Zinc sulfate is mainly used as base fertilizer and extra-root fertilizer. When used as a basal fertilizer, it is mostly used with organic fertilizers and physiological acid fertilizers. Generally, about 250 grams per plant is used as the ageing tree; the aftereffect period is longer and can be used once to maintain for 2-3 years. When top dressing is done outside the root, it usually sprays 2-3 years old shoots before germination in early spring, spraying concentration 20-30 times, fertilizer effect can be maintained for 1 year. In the growing season, organic chelated zinc fertilizers are generally used. For example, the special nutrient for nutrient balance is 300-500 times liquid, which can be effective after spraying 3-5; mild zinc deficiency for about 10 days, can return to normal; when severe zinc deficiency, can The spray is applied once every 7-10 days for a total of 2-3 times, and it can also return to normal. Calcareous soils and high-yielding orchards are sprayed once or twice a year with special zinc fertilizers, which can effectively prevent zinc deficiency.