天津市蓟县下营镇地处燕山山脉南麓,黄崖关长城贯通全镇。空气清新无污染,水源清洁,土壤为淋溶土。年均气温10℃,年降雨量500～700mm,无霜期180d,年均总日照时间2132h。全镇苹果总面积为206hm2,年产优质果品363.5万kg,2001年与北京市天地生有机食品有限公司合作,经原国家环保总局认证生产的无公害苹果,果品价格是普通3～5倍,收到了较高经济效益和社会效益。 Under the town of Ji County, Tianjin is located in the southern foot of the Yanshan Mountains, Huang Yaguan Great Wall runs through the town. Fresh and clean air, clean water, soil leaching soil. The average annual temperature is 10 ℃, the annual rainfall is 500 ~ 700mm, the frost-free period is 180 days and the average annual sunshine time is 2132h. The town of apple a total area of ​​206hm2, with an annual output of 3635000 kg of high-quality fruit, natural and organic food Co., Ltd. in Beijing in 2001, the former State Environmental Protection Administration certified pollution-free apples, fruit prices are 3 to 5 times the normal, Received a higher economic and social benefits.