(一)脐橙的起源及分布脐橙属甜橙类。甜橙及其他柑桔品种在我国栽培至少有四千年以上的历史。欧州古代没有柑桔、甜橙,罗马帝国一世纪时从东方引进枸椽。十六世纪初(一五一八年)葡萄牙帝国主义侵略我国台湾、广东、福建时带去甜橙和其他柑桔类品种种籽,栽种在葡京里斯本。十七世纪中叶才传播到欧洲其他国家。美洲在十六世纪以前,也没有柑桔品 (A) the origin and distribution of navel oranges are oranges. Sweet oranges and other citrus cultivars have been cultivated in China for at least 4,000 years. In ancient Europe there were no oranges, oranges, and the introduction of citrus rafters from the East in the first century. At the beginning of the 16th century (1518), Portuguese imperialism invaded China’s Taiwan, Guangdong and Fujian Provinces to bring seeds of sweet orange and other citrus varieties into Lisboa Lisbon. The mid-seventeenth century spread to other European countries. The Americas did not have citrus products until the 16th century