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一、前言柑桔是一种亚热带常绿果树,喜温暖潮湿的气候。我国柑桔栽培据记载已有四千多年的历史。关于柑桔的分布界线的记载也有二千多年的历史。《周礼考工记》中有“桔逾淮而北为枳”。分布范围很广,南起海南岛,北至黄淮地区,东自长江口的崇明岛,西至西藏的雅鲁藏布江河谷,均有柑桔树分布。大致范围在北纬18—37度。柑桔分布最高的四川省巴塘县,海拔达二千六百米左右的高度。全国栽培面积(台湾省未计入,以下产量亦
I. Introduction Citrus is a subtropical evergreen fruit tree, like a warm and humid climate. Citrus cultivation in China has been documented for more than 4000 years of history. There are more than 2,000 years of records about the distribution of citrus. “Zhou Li Kaogongji” in the “over Huai Huai north of trifoliate orange.” Distribution range is wide, Hainan Island from the south, north to Huanghuai region, east of Chongming Island from the mouth of the Yangtze River, west of Tibet’s Brahmaputra Valley, citrus trees are distributed. The approximate range of 18-37 degrees north latitude. Batang County, the highest distribution of citrus in Sichuan Province, is about 2,600 meters above sea level. National cultivated area (not included in Taiwan Province, the following output also