中文摘要：

采用现场实测与实验室分析相结合的研究方法,对长沙市城市森林土壤理化性质及碳贮量特征进行了研究,结果表明：（1）土壤pH值为4.69;有机质含量为17.59 g.kg-1;全N、全P含量分别为0.99、0.38 g.kg-1,且有效率低,均为2%;全K含量为6.13 g.kg-1,属适量K型土壤;全Ca、全Mg含量分别为0.79、3.00 g.kg-1。（2）土壤微量元素含量依次排序为Fe〉Mn〉Zn〉Cu〉Pb〉Ni〉Co〉Cd,全Cu、全Zn、全Ni、全Pb均未超过我国土壤环境质量标准（GB15618—1995）中的二级和三级标准,长沙市城市森林土壤可以作为农林地使用。（3）土壤有机碳含量为6.07~19.34 g.kg-1,有机碳贮量为84.78 t.hm-2,均以土壤表层最多,并随土层的增加而减少。研究结果可为长沙城市森林碳汇源功能的估算提供参考数据和理论依据。

英文摘要：

Soil physicochemical property and its carbon storage in urban forest of Changsha city were analyzed by field measurement and laboratory chemical analysis methods.The results show that soil pH value was 4.69;soil organic matter content was 117.59 g·kg-1;total nitrogen content（total N） and total P content were 0.99 g·kg-1 and 0.38 g·kg-1 respectively,and both with a low efficiency of merely 2%;total K content was 6.13 g·kg-1,being classified as moderate K soil type;Total Ca,total Mg content were 0.79 g·kg-1 and 3.00 g·kg-1,respectively.The soil microelements contents were ranked as FeMnZnCuPbNiCoCd,and of them,the content of total Cu,Zn,Ni and Pb were not in excess of Grade Ⅱand Grade III of National Soil Environmental Quality Standard in China（GB15618-1995）,so the urban forest soil of Changsha is suitable for agricultural and forestry lands.The amount of soil organic matter content and carbon storage were 6.07~19.34 g·kg-1 and 84.78 t·hm-2,respectively;more organic carbon distributed in the soil surface layer and organic carbon decreased with the increase of soil depths.The results provide a basis for reference data and theory evidence in estimation of carbon storage in urban forest plantations of Changsha city.