为了了解滨海湿地土壤中溶解性有机质的结构特征及来源,2014年1月在胶州湾采集光滩、碱蓬、芦苇和大米草湿地的土壤样品,测定土壤溶解性有机质(DOM)含量,利用三维荧光技术进行光谱分析.结果表明:胶州湾4种湿地类型土壤溶解性有机碳(DOC)含量表现为大米草湿地>光滩>碱蓬湿地>芦苇湿地,垂直剖面上随土层深度的增加DOC含量均呈减少的趋势.经光谱分析,胶州湾湿地土壤DOM的三维荧光光谱(3DEEMs)中出现了B、T、A、D和C等5种荧光峰,分别代表类酪氨酸、类色氨酸、类富里酸、类可溶性微生物副产物和类腐殖酸5种组分.利用荧光区域积分(FRI)法对5种组分进行定量分析,类色氨酸、类富里酸和类酪氨酸在DOM各组分含量中居前3位,类可溶性微生物副产物和类腐殖酸的含量次之,二者含量差异不显著.DOM的5种组分相互之间均呈显著正相关,与DOC含量呈显著正相关,与总磷、有效磷、总氮有不同程度的相关性.胶州湾4种湿地类型土壤DOM主要由生物相互作用内源产生,且腐殖化程度较低. In order to understand the structural characteristics and sources of dissolved organic matter in coastal wetland soils, soil samples from light beach, soda pool, reed and sod grass were collected from Jiaozhou Bay in January 2014 to determine the content of dissolved organic matter (DOM) Fluorescence spectroscopy.The results showed that the content of dissolved organic carbon (DOC) in the four wetland types in the Jiaozhou Bay was as follows: rice grassy wetland> light beach> alkali wetland> reed wetland, and the vertical profile increased with the depth of soil DOC The results showed that there were 5 kinds of fluorescence peaks of B, T, A, D and C in the three-dimensional fluorescence spectra (3DEEMs) of DOM in the soil of Jiaozhou Bay wetlands, representing the tyrosine, 5 kinds of components, such as tryptophan, leucine, leucine, levofloxacin, soluble microorganism byproducts and humus-like substances, were quantitatively analyzed by fluorescence area integral (FRI) Among the DOM components, the contents of DOM and soluble humic acid were the top three, while the contents of DOM and DOM were the lowest among all the components of DOM.No significant difference was found between the contents of DOM and DOM.All the five components of DOM were positively correlated with each other, And DOC content was significantly positively correlated with total phosphorus, Available phosphorus and total nitrogen had different degrees of correlation.The soil DOM in four wetland types in Jiaozhou Bay was endogenously produced mainly by biological interaction and the degree of humification was low.