概述

位于内蒙古自治区东部哲里木盟和昭乌达盟行政区域内，还包括锡林郭勒盟及吉林、辽宁、河北省边缘部分地区.北、东、南界线五东北、华北温带湿润半湿润地区为邻.具体界线自阿尔山以南中蒙国界向东，沿绰尔河谷跨跃大兴安岭，到乌兰浩特东北的扎赉特旗附近；再折向南，并沿科尔沁草原东缘到辽宁省彰武附近；再折向西沿库伦旗和围场县南内蒙古高原南缘向西南行.在多伦与围场之间沿苏克斜鲁山地西缘北行至阿尔山以南，与北缘成一团合梯形.北、西、南三面均为山脉或台地，山脉内侧为丘陵，中部及东部则为平原.地形呈马蹄形，西高东低，海拔２０—１２０米，地势起伏大，类型复杂.西辽河及其支流流贯全区.温度与降水条件较好，日平均温度≥１０℃积温１４０°—３２０℃，平原高于山地.年降水量３０—６００毫米，山地多于平原.夏季降雨占全年雨量的８０％左右.春季干旱多大风，在失去植被保护或已开垦的沙地多已沙化，甚至形成流动沙丘.土壤植被类型繁多.可分为苏克斜鲁山地丘陵亚区、燕山北麓丘陵台地亚区和西辽河中游平原亚区.Inner Mongolia Autonomous Region is located in the eastern jiremUnionand ju ud Union administrative areas, but also including the Xilin Gol League, and Jilin, Liaoning, Hebei Province, some parts of the edge. The north, east, south and north-east boundary of 5, northern temperate humid sub-humid areasneighborhood. Since the specific boundaries of the south of the Sino-Mongolian borders Aershan east, along the valleyleapDaxinganling chaor to Ulanhot JalaidBannernear the northeast; and then fold the south, and the Horqin grassland along the eastern edge of the Liaoning Province, near Zhangwu; re - hure qi and paddock off to the west along the south county line southwest southern edge of Inner Mongolia Plateau. in Toulon and the paddock, along the western edge of Souq ramp to northbound Lushan to quenual south of the northernmarginof yelling together with the ladder. North , west and south are the mountains on three sides, or tableland, mountains inside the hills, compared with central and eastern plains. topography was horseshoe-shaped, from west to east, elevation 20-120 meters, rugged and types of complexity. West Liaohe River and its tributaries consistent flow of the region. better conditions of temperature and precipitation, the daily average temperature ≥ 10 ℃ accumulated temperature of 140 ° -320 ℃, higher than the mountain plains. 30-600 mm annual precipitation, mountain rather than plain. summer rainfall annual rainfall total about 80%. spring drought, more wind protection or the loss of vegetation has been cleared of sand are already desertification, and even the formation of sand dunes. different types ofsoil vegetation. can be divided into sub-suk oblique Lushan in hilly areas, the northern foot of hills mesa Yanshan sub-district and middle reaches of the West Liaohe Plain sub-regions.