玉米是内蒙古自治区重要的粮食、饲料、经济作物和工业原料,其种植面积、总产量、单产水平皆居粮食作物之首。“九五”期间,全区年均玉米种植面积达133.8万hm2,占粮食作物种植面积的30％左右;年均玉米总产达733.9万t,占粮食总产的50％以上;玉米单产平均为5536.5kg/hm2,超过全国和世界玉米平均单产水平,在我国也属前列。2000年我区玉米出口量达300万t,排全国第一位,玉米在我区农业生产和国民经济中占举足轻重地位。但是,“八五”、“九五”期间我区玉米单产水平基本在5500kg/hm2左右,已处于徘徊状态,且受气候条件的影响,年间变幅加大,全区玉米总产的增加 Corn is an important grain, feed, cash crop and industrial raw material in Inner Mongolia Autonomous Region. Its planting area, total output and yield per unit are the highest among all food crops. During the Ninth Five-year Plan, the average area of ​​maize acreage reached 1.338 million hm2, accounting for about 30% of the acreage of food crops. The average annual output of maize reached 7.339 million tons, accounting for more than 50% of the total grain output. The average yield of maize For 5536.5kg / hm2, more than the national and the world average yield of corn, also in the forefront of our country. In 2000, the export volume of maize in our region reached 3 million tons, ranking the first in the country. Maize occupies a pivotal position in the agricultural production and national economy of our region. However, during the period of the Eighth Five-year Plan and the Ninth Five-year Plan, the yield per unit area of ​​maize in our district was basically about 5500kg / hm2 and was hovering. Due to the influence of climatic conditions, the annual amplitude of maize increased,