根据调查初步总结出山楂缺铁黄叶病的发生发展规律、致病因素及其对山楂生产的危害。用新研制的高效价廉、储运方便的硝黄铁矫治,效果明显。黄化病株复绿率40%～87%,三级病株减少36%～100%,叶绿素含量提高64%～224%,喷肥区比对照区株产提高25%。同时增加了果实中糖、酸、果胶及钙、铁含量,提高了果实品质。 According to the investigation, the occurrence and development of iron deficiency yellow leaf disease of hawthorn were summarized, and the risk factors and the harm to the production of hawthorn were summarized. With the newly developed high-efficiency, easy storage and transportation of nitric yellow iron, the effect is obvious. Yellowing rate of 40% ~ 87% of the diseased plants, three diseased plants reduced 36% to 100%, chlorophyll content increased by 64% to 224%, spraying area than the control area increased by 25%. At the same time increase the fruit sugar, acid, pectin and calcium, iron content, improve the fruit quality.