“一年好景君须记,正是橙黄桔绿时”。八百年前(公元1178),正当“橙黄桔绿”的时候,韩彦直写成了世界上第一部柑桔专书——《桔录》。这本书一直流传至今,对我国以至世界的柑桔栽培业和果树园艺学都有重要的贡献。 韩彦直字子温,陕西延安府,肤施县人。生于宋高宗绍兴元年(公元1131),卒年不详,约在 “King good year must remember, it is orange yellow orange green.” Eight hundred years ago (AD 1178), just as “orange and orange green”, Han wrote straight into the world’s first citrus book - Orange Record. This book has been circulating till now and has an important contribution to citrus cultivation and fruit horticulture in our country and in the world. Han Yan straight word warm, Yan’an Prefecture, Shaanxi, skin Shi County. Born in the Song Dynasty Emperor Shaoxing the first year (AD 1131), died unknown, about