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笔者于1977—1979年间对吉林省西北部及大兴安岭中段林木害虫进行了考察,现将结果作一报导。一、自然概况吉林省西北部及大兴安岭中段位于东经120°—126°9′,北纬44°59′—47°41′之间。东西长510公里,南北宽240公里,总面积79,432平方公里,洮儿河和松花江等河流经这一地带。 (一) 大兴安岭中段地区:位于内蒙古呼伦贝尔盟高原南面,锡林郭勒盟高原北面,西至大兴安岭山脉西边的阿尔山和伊尔施,东到科右前旗索伦和突泉县的北部,为山区及半山区。海拔1,200米左右,最高峰(太平岭)高达1,712米,属于寒冷半湿润的雪林气候,年降
The author studied the pests in the northwestern part of Jilin Province and the middle section of the Greater Khingan Range between 1977 and 1979, and reported the results. I. Natural Overview The northwestern part of Jilin Province and the middle section of the Greater Khingan Range lie between longitude 120 ° -126 ° 9 ’and latitude 44 ° 59’-47 ° 41’ north. 510 km east-west, 240 km north-south width, with a total area of 79,432 square kilometers, Tao Erhe and Songhua River and other rivers through this zone. (1) Middle section of Daxinganling: Located in the south of Hulunbuir highlands of Inner Mongolia, north of Xilin Gol League plateau, to Aershan and Yiershi west of Daxinganling Range and to the north of Suolun and Tuquan of Kezuoqian Banner in the east, Mountain. 1,200 meters above sea level, the highest peak (Taiping Ridge) up to 1,712 meters, belonging to the cold semi-humid snow forest climate, annual decline