[目的]科学评估宁波市城市森林生态服务价值.[方法]选择3个生境梯度林带中的14个树科,采用干烧法测定分析宁波市主要绿化树种枝、叶的C、N、S含量,分别比较不同树种和不同林带的C、N、S分布特征.[结果]宁波市14个绿化树种枝、叶器官的C、N、S量差异较大,叶片C、N、S元素含量分别为44.77％、1.33％和0.20％,在正常范围内;不同树种叶器官的N含量显著高于枝器官,不同生境枝、叶器官S含量差异显著,N、C含量差异不显著.宁波地区森林主要树种C、N、S元素含量相对稳定,但不同植被区域具有不同的植物元素计量特征.[结论]该研究可为宁波市森林服务价值评估及布局优化提供科学依据.%[Objective] To scientifically evaluate the ecological service value of urban forest in Ningbo.[Method] 14 tree species in 3 forest belts were selected,the content of carbon,nitrogen and sulphur in the branches and leaves of main greening tree in Ningbo was measured by combustion method.The distribution characteristics of carbon,nitrogen and sulfur in different tree species and different forest belts were compared.[Result]The results showed that the forteen species had obviously different content of carbon,nitrogen and sulphur in branch and leaf,which were 44.77％,1.33％ and 0.20％ respectively,and those were in the normal range;The nitrogen content of leaf organs of different tree species was significantly higher than that of branch organs,the difference of sulphur content of branch organs in different habitats was significant,while the difference of carbon and nitrogen content is not significant.The comparative analysis showed that the content of carbon,nitrogen and sulphur of the main tree species in Ningbo forest was relatively stable,but there was different content of plant elements in different vegetation areas.[Conclusion]The study can provide a scientific basis for the evaluation and layout optimization of forest services in Ningbo.
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