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以盛果期红富士苹果为试材 ,在大田条件下研究了补锌措施对缺锌小叶病防治及锌运转和营养规律的影响。结果表明 ,10月中旬落叶前根外喷施 15 %ZnSO4·7H2 O可大幅度提高枝干锌贮藏营养水平 ,有利于平衡锌在根、枝、叶间的分配 ,调节树体内P、K、Zn间的平衡 ,提高锌运转能力和有效性 ,满足树体周年发育需求 ;秋季土壤施锌肥可提高根锌贮藏水平 ,但锌的运转力相对较低 ;萌芽前根外喷锌可提高早期枝叶锌营养水平 ,但持效期短。花后 3周根外喷锌对锌运转影响很小
Taking the full-fledged Red Fuji apple as test material, the effect of zinc supplementation on the control of Zinc deficiency disease and the regulation of zinc nutrition and nutrition was studied under field conditions. The results showed that the spraying of 15% ZnSO4 · 7H2O on the root before deciduous leaves in mid-October could greatly improve the nutrition level of zinc storage in branches and stems, which was beneficial to balance the distribution of zinc between roots, branches and leaves and regulate the contents of P, K, Zn balance and improve the ability and effectiveness of zinc to meet the needs of annual tree development; autumn soil zinc application can improve the level of storage of zinc, zinc, but the operating force is relatively low; Foliar zinc nutrition, but short duration. 3 weeks after flowering zinc spray zinc on the operation of a small effect