７０年代以来，日本开创了柑桔的塑料大棚栽培，使地处高纬度、气温较低、寒潮频繁入侵的日本柑桔业获得了优质高产高效益的综合效果［１、２］。目前，我国北方也有部分地区引种柑桔，并取得了一定成绩。但生产中普遍存在缺铁现象，而国内尚未见如何矫治的报道。为此笔者... Since the 1970s, Japan pioneered the cultivation of citrus plastic greenhouses, resulting in the combined effects of high quality, high yield and high efficiency in the Japanese citrus industry, which are located in high latitudes, low temperatures and frequent inundation. [1,2] At present, some parts of northern China have also introduced citrus and some achievements have been made. However, there is a widespread iron deficiency phenomenon in production, but there is no report on how to correct the disease in China. For this author ...