湖北省宜城县龙头乡外滩村办林场温州蜜柑园系1984年4月定植,总面积10亩,1986年始果,1987年总产4000公斤。1988年7月发现所有当年新叶呈现一派淡黄,并多纵卷向内抱合,着果寥寥。究其原因,既非缺氮(缺氮老叶先黄),也非缺硫(缺硫叶不纵卷抱合),根据其部分越冬老叶中部叶脉间隐约可见的油渍状小黄斑,初步认为可能是缺钼引 Yantai County, Hubei Province, the first village of the Bund Village Office Forestry Satsuma orange garden planted in April 1984, with a total area of ​​10 acres, the beginning of 1986 fruit, 1987 total output 4000 kilograms. In July 1988, it was found that all the new leaves of the year showed a group of pale yellow, and many vertical crooks held inwards with a few results. The reason is neither nitrogen deficiency (lack of nitrogen old leaves first yellow), nor sulfur deficiency (lack of sulfur leaves do not entanglement), according to the part of the middle part of the winter veins of the central loin vaguely visible small macula, initially that Molybdenum may be cited