为了了解胶州湾河口湿地土壤碳氮的空间分布特征，2011年11月对该区域土壤有机碳（TOC）、总氮（TN）、硝态氮（NO3--N）、铵态氮（NH4＋-N）、总磷（TP）以及 pH、盐度、含水量进行了测定与分析。结果表明，1）胶州湾河口湿地 TOC、TN、NO3--N、NH4＋-N 以及 TP 含量分布总体随深度增加而下降，除 TOC（P ＝0．022）外，TN、NO3--N、NH4＋-N、TP 含量的剖面差异极显著（P ＜0．01）。碱蓬湿地和芦苇湿地中，NH4＋-N 的垂直变异系数均大于 NO3--N；2）胶州湾河口湿地土壤中氮的主要存在形式为有机氮。芦苇湿地表层土壤中 TOC 含量高于碱蓬湿地，而碱蓬湿地 TN、TP 含量高于芦苇湿地；3）胶州湾河口湿地土壤中 TN、TP 与 TOC 极显著相关（P ＜0．01），淹水对 NO3--N、NH4＋-N 的产生和迁移均产生一定程度的影响；4）与其他滨海湿地生态系统对比，胶州湾湿地土壤中营养元素含量较为丰富，TOC、TN、NO3--N 以及 NH4＋-N 均处于较高水平。陆源是胶州湾河口湿地有机质的主要来源，且湿地中有机碳腐殖化程度较高。%In order to elucidate the spatial distribution characteristics of soil carbon and nitrogen in Jiaozhou Bay estuarine wetlands,soil TOC,TN,NO3 --N,NH4 +-N,TP,pH,salinity and water content were measured and analyzed in November,2011.1)Soil TOC,TN,NO3 --N,NH4 +-N and TP decreased significantly with the increasing soil depth.The coefficient of variation for NH4 +-N was higher than that of NO3 --N in reed and Suaeda wetlands.2)The main form of nitrogen was organic.The TOC content in the surface soil of reed wet-land was higher than that of Suaeda wetland,while TN and TP contents of Suaeda wetland were higher than those of reed wetland.3)There was a significant correlation between TN and TP and TOC.Flooding influ-enced the generation and migration of NO3 --N and NH4 +-N.4)Compared with other coastal wetland ecologi-cal systems,Jiaozhou Bay estuarine soils were high in TOC,TN,NO3 --N and NH4 +-N.Surrounding land is the main source of organic matter for these wetlands which are in an advanced stage of humification.
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