一、自然环境概况江苏位于东经116°22′—121°55′,北纬34°46′—35°07′之间,东濒黄海,地跨暖温带、北亚热带和中亚热带三个生物气候带。灌溉总渠以北为落叶阔叶林地带,年均温13.8℃,一月均温-0.7℃,极端最低均温-13.4℃,年降水量912毫米。境内东北部有胶东、鲁南山地延伸入境的丘陵低山,一般海拔100—200米,连云港的云台山达625米,为全省最高岭。地带性土类为棕壤。植被受海洋性气候影响,并有复杂山岳地貌的有利生 I. Overview of the Natural Environment Jiangsu is located between 116 ° 22’-121 ° 55’E and 34 ° 46’-35 ° 07’N, east of the Yellow Sea, across the warm temperate zone, and the northern subtropical zone and the subtropical zone . Irrigated north of the canal is deciduous broad-leaved forest with an average annual temperature of 13.8 ℃, average January temperature of -0.7 ℃, the lowest average temperature of -13.4 ℃, the annual rainfall of 912 mm. In the northeast there are Jiaodong, Lunan mountain extension of the hilly hills, generally 100-200 meters above sea level, Lianyungang Yuntaishan 625 meters, the highest ridge in the province. Zonal soil is brown soil. Vegetation is affected by the maritime climate and has favorable conditions for complex mountain landscapes