阿荣旗位于大兴安岭南麓,北纬47～48度,属于高寒地区。由于十年九春旱。往往在5月前后少雨,对玉米抓全苗威胁很大,常常因春旱推迟玉米的出苗期,一遇早霜就会造成大幅度减产。从历年大减产的年份看,如1966、1969、1972、1976年,都是由于秋霜来 Arong flag is located in the southern foot of Greater Khingan Range, latitude 47 ~ 48 degrees, belonging to the alpine region. Due to ten years of nine spring drought. Often in May before and after the rain, grasping the corn seedlings threatened a lot, often due to the spring drought delayed the emergence of corn, a case of early frost will result in a substantial cut. From the calendar year of large-scale production, such as 1966, 1969, 1972, 1976, are due to autumn frost