大凡读过《宋史》的人都知道宋朝名将韩世忠,而韩世忠的长子韩彦直却鲜为人知。正是这位韩彦直撰写了世界上第一部柑桔专著——《桔录》。柑桔原产于我国,据有关史料考证,我国栽培柑桔已有了4000年以上的历史。在漫长的历史发展过程中,劳动人民积累了丰富的柑桔生产经验,而对这些宝贵经验的记载多散见于各种古籍之中,缺乏系统的总结和记载。南宋韩彦直所撰写的《桔录》则是我国乃至世界上第一部系统地、科学地总结当时柑桔生产的专著,在柑桔生产发展上占有非常重要的地位。 Everyone who read the “history of the Song” knew Han Songzhong, a famous songwriter of the Song Dynasty, and Han Hsiao-yan, the eldest son of Han Shizhong, was barely known. It was Han Hanyi who authored the world’s first citrus monograph - Orange Recorded. Citrus originating in our country, according to historical research, citrus cultivation in our country has more than 4000 years of history. In the course of long historical development, the working people have accumulated rich experience in the production of citrus fruits, and the records of these precious experiences are scattered among various ancient books and lacked a systematic summary and record. The Orange Record written by the Southern Song Dynasty Han Yan was the first monograph systematically and scientifically summed up in the citrus production at the time in China and the world, occupying a very important position in the citrus production and development.