There are four reasons why the leaves of cherry trees suddenly wither.

First, suffering from pests and diseases will seriously hinder growth. Prune and spray chemicals as soon as possible after discovery.

Second, there is a shortage of water, so water it in time during the growing period, and the leaves will wither if they can't absorb water.

Third, there is a lack of nutrients, especially in the early stage of germination, and the demand for nitrogen fertilizer is large, so we should try our best to meet it.

Fourth, the temperature is too low, the temperature changes too much, and plants are frozen and easy to wither.

Fertilization principle and law of cherry

(1) Pay attention to topdressing in the early stage: it takes only 40-60 days for cherry to blossom and mature, which requires concentrated nutrition. Therefore, in fertilization management, in addition to applying base fertilizer in autumn, topdressing should be carried out before germination and early fruit development, with available nitrogen fertilizer as the main fertilizer for the first time and NPK compound fertilizer or special fertilizer for fruit trees for the second time.

(2) Pay attention to post-harvest fertilization: after the fruit is harvested, in order to enhance the nutrient accumulation of the tree and promote flower bud differentiation, nitrogen, phosphorus and potassium compound fertilizer can be applied topdressing.

(3) Apply sufficient base fertilizer: it should be applied in early autumn. Generally, from September to 65438+10 every year, 2,000 to 5,000 kilograms of decomposed organic fertilizer (ring fertilizer, soil fertilizer and human and animal manure) should be applied every 667 square meters.

(4) Topdressing outside the roots: Potassium dihydrogen phosphate foliar fertilizer or medium-trace element foliar fertilizer has good yield-increasing effect. Ribelli bird's nest powder potassium dihydrogen phosphate is selected, which is easy to absorb and not wasted.

(5) Fertilization method: The vertical roots of cherry are underdeveloped, and the roots are shallower than the soil, but the horizontal roots are developed. In order to reduce the damage of root system, it can be applied centrally in radial ditch during the growth period.