呼伦贝尔地区玉米种植面积1996年以来稳定在10万 hm~2左右,2003年达到11万 hm~2,主要集中在大兴安岭东南部,玉米播种面积占该地区总播面积的20%左右。近年随着玉米新品种、新技术的应用,玉米产量逐年提高,由20世纪90年代初的平均单产2910kg/hm~2增加到目前正常年份的4650kg/hm~2,最高单产达到11250kg/hm~2,其中玉米新品种使用,在诸增产因素中起 The area under maize planting in Hulunbeier area has been stable at about 100,000 hm 2 since 1996 and reached 110,000 hm 2 in 2003, mainly in the southeastern part of the Greater Xing’an Mountains. The sown area of ​​maize accounts for about 20% of the total sown area in the area. In recent years, with the application of new maize varieties and new technologies, the yield of maize increased year by year from 2910kg / hm ~ 2 in the early 1990s to 4650kg / hm ~ 2 in the normal year and the highest yield reached 11250kg / hm ~ 2, of which the use of new varieties of corn, in the factors that increase production