一、引言 前两报通过滨海柑桔失绿黄化病的诊断,阐明了此病是由于缺乏铁、锰等微量元素所引起的生理性病害。为了搞清发病的原因,防止这种病的发生发展,又进一步探讨了发病的土壤和植物因素。现将试验结果简报如下。 I. INTRODUCTION The first two newspapers reported the diagnosis of chlorosis yellowing disease in coastal citrus, clarifying that the disease is caused by lack of trace elements such as iron and manganese and other physiological diseases. In order to find out the cause of the disease and prevent the occurrence and development of this disease, we further explored the pathogenesis of soil and plant factors. The test results are summarized below.