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现有研究表明:叶片锰含量与0～20cm土壤有效锰、锰/铁比值、锰/全氮比值有关。苹果粗皮病发生程度与0～40cm土壤中锰/全氮比值有关,因此通过农艺措施适当降低土壤有效锰含量,增施有机肥,增加土壤全氮含量,势必会减少树体锰的吸收量,减轻苹果粗皮病发生程度。从1995年以来,我们对苹果粗皮病果园覆草、增施有机肥、施用钙镁磷肥的应用效果进行了调查,现汇总如下。
The existing research shows that leaf Mn content is related to available manganese, manganese / iron ratio and manganese / total nitrogen ratio in 0 ~ 20cm soil. The degree of occurrence of apple skin disease is related to the ratio of manganese to total nitrogen in 0 ~ 40cm soil. Appropriately reducing the effective manganese content of soil through agronomic measures, increasing organic manure and increasing the total nitrogen content in the soil will inevitably reduce the amount of manganese absorbed by the tree, Reduce the incidence of apple skin disease. Since 1995, we have carried out a survey on the application effect of apple peel grass orchard mulching, adding organic fertilizer and applying calcium magnesium phosphate fertilizer, and are summarized as follows.