大兴安岭北部,即伊勒呼里山以北的大兴安岭主体部分,大致位于北纬51°20′—53°28′,东经121°31′—126°30′之间,是我国的最北端。其地带性土壤类型,过去说法不一,曾有人命名为生草灰化土、棕色灰化土、棕色泰加林土、灰白色森林土(中国科学院内蒙古宁夏综合考察队等,1978)、棕色针叶林土、漂灰土(中国科学院南京土壤研究所 The northern part of the Greater Hinggan Mountains, the main part of the Greater Hinggan Mountains to the north of Mount Elle, is located roughly between north latitude 51 ° 20’-53 ° 28 ’and longitude 121 ° 31’-126 ° 30’, making it the northernmost point in China. Its zonal soil types have different opinions in the past. Some people have named them grass green asher, brown asher, brown Taygar soil, and gray forest soil (Comprehensive Investigation Team of Inner Mongolia Ningxia, Chinese Academy of Sciences, etc., 1978), brown needles Forest soil, floating ash (Nanjing Institute of Soil Science, Chinese Academy of Sciences