方法一 在叶片生长盛期以叶面喷0.3％硫酸亚铁加0.5％尿素2～3次效果较好,一定要严格掌握硫酸亚铁的稀释浓度,间隔时间为半月。 方法二 钻孔注入,在病树上选一骨干枝,用铁锥从上往下钻数个小孔,深达木质部内,用注射器将0.1％的硫酸亚铁溶液注入孔内,孔外用粘泥封严,此法也可用于其他缺素症。 Method One In the leaf growth period with foliar spray 0.3% ferrous sulfate plus 0.5% urea 2-3 times better, we must strictly control the dilution of ferrous sulfate concentration, the time interval of half a month. Method two hole injection, in the diseased tree to choose a backbone branch, with iron cone from the bottom down several holes, deep xylem, with a syringe 0.1% ferrous sulfate solution into the hole outside the hole with sticky Mud seal, this method can also be used for other deficiency disease.