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苹果树缺锌易发生小叶病,使其幼嫩枝尖端小叶簇生,叶片生长受到限制,芽苞形成较少,新梢发育不良,严重影响果树生长发育,造成产量下降,效益降低.对此,金县四十里堡乡经过三年试验证明,给小叶病果树喷施锌肥(硫酸锌)有明显的防病治病、增强树势的作用.方法是,从6月上旬开始,每7天喷一次,连续喷三次即可.喷施硫酸锌水溶液的浓度以0.3%
The occurrence of zinc deficiency in apple trees is prone to lobular disease, the leaflets are clustered at the tips of young shoots, the growth of leaves is restricted, bud bud formation is less, the shoots are poorly developed, which seriously affects the growth and development of fruit trees, After three years of trial, Jinli County Forty Fort Township proved that the application of zinc fertilizer (zinc sulfate) to the leaflet diseased fruit tree has obvious disease prevention and treatment and enhances the effect of the tree vigor. From the beginning of June, every 7 Spray once a day, three times in a row can spray spraying zinc sulfate aqueous solution concentration of 0.3%