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德昌县是我省油茶基地县之一,栽培历史比较悠久。该县地处凉山州腹地,位于北纬27°25′,东径102°11′,属亚热带高原季风气候;北有高山阻碍南下寒潮侵袭,南受暖流控制,气候温暖;年平均气温17.6℃,各月平均气温都在10℃以上,最高月平均气温为23℃;昼夜温差较大。年平均日照2207.7小时,年平均降雨量1045.6毫米,雨量多集中夏、秋两季,约占全年降雨量95％以上;冬、春少雨,常伴南风;年蒸发量在2200—2500毫米,冬、春干旱季节的蒸发量为降雨量的2.5倍;年平均相对温度62％,空气比较干燥,≥10℃的有效积温5000—6000小时。
Dechang County, one of the base counties of Camellia in our province, cultivate a long history. The county is located in Liangshan Prefecture hinterland, located at latitude 27 ° 25 ’north latitude and 102 ° 11’ east, is a subtropical plateau monsoon climate; north alpine hinder the invasion of the southern cold wave, the south by the warm flow control, warm climate; annual average temperature of 17.6 ℃, The average monthly temperature is above 10 ℃, the highest monthly average temperature of 23 ℃; large temperature difference between day and night. The average annual sunshine 2207.7 hours, the average annual rainfall of 1045.6 mm, the rainfall concentrated in summer and autumn, accounting for more than 95% of the annual rainfall; winter, spring less rain, often accompanied by the southerly; annual evaporation in 2200-2500 mm In winter and spring, the evaporation in the dry season is 2.5 times of the rainfall. The annual average relative humidity is 62%, the air is dry, and the effective accumulated temperature≥10 ℃ is 5000-6000 hours.