向海是国家级自然保护区,以保护和繁殖珍稀动物丹顶鹤和蒙古黄榆为主。位于蒙古高原与东北平原相接处的松嫩平原西缘,在吉林省通榆县境内,其地理位置在东经122°5′----122°31′,北纬44°55′----45°9′。属北温带大陆性季风气候,年平均气温4.9℃。境内土壤多为栗盖土、盐碱土和风积沙土,厚度一般在0.5----1.0M之间,土壤腐殖质少,PH值偏 To the sea is a national nature reserve, in order to protect and breed rare animals red-crowned crane and Mongolian yellow elm mainly. Located in the western edge of the Songnen Plain at the location where the Mongolian plateau meets the northeast plain, it is within the Tongyu County, Jilin Province. Its geographical location is between 122 ° 5 ’---- 122 ° 31’ east longitude and 44 ° 55 ° north latitude -45 ° 9 ’. Is a north temperate continental monsoon climate, the annual average temperature of 4.9 ℃. The territory of soil mostly chestnut cover soil, saline soil and aeolian sand, the thickness is generally between 0.5 ---- 1.0M, less humus soil, PH value