四川是我国柑桔产量最多的省。栽培历史已有4000多年。在汉时已有相当的经济栽培。如《史记》说:“蜀汉江陵千树桔。……此其人皆与千户候等。”而且,柑桔的贮藏运输也是很早就有记述的。如四川今日仍广为应用的果实包纸运输、贮藏,早在唐时就有记述。如《大唐新语》云:“益洲每岁 Sichuan is the province that produces the most citrus in our country. Cultivation history has more than 4,000 years. In the Han Dynasty, there had been considerable economic cultivation. Such as “Historical Records” said: “Shu Han Jiangling thousands of tree oranges ... ... all of these people with a thousand households waiting.” Moreover, the citrus storage and transportation is also described earlier. Such as Sichuan today is still widely used fruit package paper transport, storage, as early as the Tang Dynasty there. Such as “Tang language” cloud: "Yi Chau every year