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一、前言浙江黄岩是我国主要柑橘产地之一,一向以品种多、质量好著称于中外,大跃进以来连年丰产,成为我国柑橘业中的一面红旗。黄岩橘园多分布在沿江低地,与水稻田交错相邻,排水不良,地下水位高。橘叶上广泛存在着因缺乏微量元素而引起的种种生理病害,即缺乏症状,落花落果现象亦较严重。根据上述情况,1960年在黄岩进行了柑橘的微量元素营养的研究,搜集植橘土壤与橘叶试样,测定微量元素含量进行对比,结合橘叶的种种缺乏症状,寻求导致缺乏的原因,
I. INTRODUCTION Zhejiang Huangyan is one of the major citrus origins in China. It has always been famous for its variety and good quality at home and abroad. Since the Great Leap Forward, it has become a red flag in the citrus industry in China. Huangyan orange orchards are located in the lowlands along the Yangtze River, staggered adjacent to the paddy fields, poor drainage, high water table. Orange leaves widespread due to the lack of trace elements caused by a variety of physiological diseases, that is, the lack of symptoms, flowers and deciduous phenomenon is also more serious. According to the above situation, in 1960, the research of trace element nutrition of citrus was carried out in Huangyan. The orange soil samples collected from orange plantation and the content of trace elements were compared. Combined with the lack of symptoms of orange leaves,