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内蒙烟区多分布于自治区东南部的赤峰地区，东与辽宁省毗邻，南同河北省接壤，地处我国种烟适宜区的北缘。全年无霜期只有１３５～１４０ｄ，年降雨量４００～５００ｍｍ，年≥１０℃有效积温２８００～３３００℃，年≥２０℃持续日数不足７０ｄ，昼夜温差较大。本区土壤ｐＨ
Inner Mongolia Tobacco is mainly distributed in the Chifeng area in the southeastern part of the autonomous region, adjacent to Liaoning Province in the east, bordering Hebei Province in the south, and located in the northern margin of the suitable tobacco-growing area in China. Annual frost-free period is only 135 ~ 140d, the annual rainfall of 400 ~ 500mm, the effective accumulated temperature of ≥ 10 ℃ 2800 ~ 3300 ℃, the number of days ≥ 20 ℃ less than 70d, greater temperature difference between day and night. The soil pH in this area