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内蒙古阴山后山农业区,位于北纬40°43′～42°35′,东经109°40′～116°′55之间,南靠阴山山地,北接蒙古高原,属阴山山脉向高平原过渡地带。地貌主要由低山、丘陵、盆地及丘间谷地、川滩地等组成。海拔1,200～1,900米。本区光资源丰富,年日照时数2,900～3,200小时,年辐射量140～160千卡/厘米~2;热量资源较少,生长期短,仅90～120天,年平均气温1.3～3.1℃,≥10℃年积温1,800～2,200℃,最高气温36℃,最低气温
Inner Mongolia Yinshanhoushan agricultural area, located in latitude 40 ° 43 ’~ 42 ° 35’, longitude 109 ° 40 ’~ 116 ° ’55 between the south Yinshan Mountains, north Mongolia Plateau, Yinshan Mountains is a transition zone to the high plains . The landform is mainly composed of low mountains, hills, basins, valleys and valleys. 1,200 to 1,900 meters above sea level. The region is rich in light resources, the annual sunshine hours 2,900 ~ 3,200 hours, the annual radiation 140 ~ 160 kcal / cm ~ 2; less heat resources, the growth period is short, only 90 to 120 days, the annual average temperature of 1.3 ~ 3.1 ℃ , ≥ 10 ℃ accumulated temperature 1,800 ~ 2,200 ℃, the maximum temperature of 36 ℃, the lowest temperature