苹果小叶病是因缺锌而引起的生理性病害,而造成缺锌的因素则是多方面的。首先是由于立地条件较差,发病苹果园多为砂质土壤,瘠薄,土壤中的锌易被固定,使相对含量减少。其次是由于果园管理粗放,根系生长不良,分布范围小,吸收能力差。除锌不足外还与品种砧木、水分、土壤管理、立地条件、栽培、修剪等多种原因有关。针对上述情况,我们从狠抓综合管理入手。 Apple leaflet disease is caused by zinc deficiency and physiological diseases, and zinc deficiency is caused by many factors. The first is due to poor site conditions, the incidence of apple orchards mostly sandy soil, barren, zinc in the soil easily be fixed, so that the relative content decreased. The second is due to extensive management of orchards, poor root growth, distribution of small, poor absorption. In addition to the lack of zinc and varieties of rootstocks, moisture, soil management, site conditions, cultivation, pruning and other reasons. In view of the above situation, we pay close attention to integrated management.