选择生长在三江平原湿草甸和沼泽化草甸上的小叶章(Calamagrostis angustifolia)为研究对象,在2004～2008年小叶章生长季,测定了其根、茎、叶和叶鞘内的有机碳含量、全氮含量、全磷含量和全硫含量,研究了小叶章体内营养元素含量特征及其生长限制元素。结果表明,在两种类型湿地上生长的小叶章,其体内各器官的有机碳含量、全氮含量、全磷含量和全硫含量都存在差异;两种类型湿地的小叶章地上部分各器官中,全氮含量、全磷含量和全硫含量都是在叶中最大,其次为叶鞘、茎;湿草甸小叶章根营养元素含量明显低于其地上部分各器官,而沼泽化草甸小叶章则相反;两种类型湿地上的小叶章地上部分器官中的各营养元素含量之间多存在显著相关关系,而根中各元素含量之间几乎不相关;氮是限制小叶章生长发育的最主要的营养元素;湿草甸小叶章相对更易受到硫元素的限制。 The Calamagrostis angustifolia growing on wet meadow and swamp meadow of Sanjiang Plain was chosen as the research object. The contents of organic carbon in roots, stems, leaves and sheaths were measured during the growth season of Calamagrostis angustifolia from 2004 to 2008 , Total nitrogen content, total phosphorus content and total sulfur content were studied. The content of nutrients and their limited growth elements were studied. The results showed that there was a difference in organic carbon content, total nitrogen content, total phosphorus content and total sulfur content among the organs of C. angustifolia grown on two types of wetlands. , Total nitrogen content, total phosphorus content and total sulfur content are the largest in leaves, followed by leaf sheaths, stems; wet meadow leaflet root nutrient content was significantly lower than its aerial parts of organs, and marsh meadow leaflet On the contrary, there was a significant correlation between the contents of various nutrient elements in the above-ground organs of the two types of wetlands, while there was almost no correlation between the contents of the elements in the roots. Nitrogen was the most important factor limiting the growth and development Of the nutrient elements; wet meadow leaflet is relatively more susceptible to the sulfur element limits.