中文摘要：

以空间代替时间,结合方差分析、多重比较和Pearson相关分析等方法,对闽东滨海湿地互花米草入侵不同阶段群落类型（秋茄红树林群落、秋茄红树林-互花米草共生群落、互花米草群落和光滩）的土壤理化性质和酶活性及二者相关性进行了差异分析,试图解释互花米草成功入侵的土壤学机理。结果表明：互花米草入侵增加了土壤密度,降低了土壤p H值和含水率,减少了土壤有机碳、有机质、全氮和全磷含量。互花米草入侵提高了闽东滨海湿地土壤的蔗糖酶、碱性磷酸酶和过氧化氢酶活性,降低了土壤脲酶活性。相关分析表明,土壤酶活性与土壤理化因子存在密切关系,蔗糖酶与全氮、全磷和含水率呈极显著正相关,与土壤密度呈极显著负相关;脲酶与含水率显著正相关,与土壤密度显著负相关;碱性磷酸酶与全磷、含水率显著正相关,与土壤密度显著负相关;过氧化氢酶与理化因子无相关性。本研究为治理互花米草提供理论依据。

英文摘要：

Using space method instead of time,and combined with variance analysis,multiple comparison and Pearson related analysis,differential analysis in soil physicochemical properties,enzyme activity and their correlations were made in different stages of community types（ Kandelia candel red wood community,Kandelia candel red wood-Spartina alterniflora symbiosis community,Spartina alterniflora community and bare beach） invaded by Spartina alterniflora in eastern Fujian coastal wetland,trying to explain the soil science mechanism of Spartina alterniflora invasion. Results showed that： Spartina alterniflora＇s invasion increased soil density,decreased the p H value of soil,moisture content,and reduced the concentrations of soil organic carbon,organic matter,total nitrogen and total phosphorus. It also increased the soilenzyme activities of invertase, alkaline phosphatase and catalase, and decreased urease activity.Correlation analysis showed that,there was a close relationship between soil enzyme activity and soil physicochemical factors. Among them,sucrose enzyme was very significantly positively correlated with total nitrogen,total P and water content,was very significantly negatively correlated with p H value and soil density; urea enzyme was significantly positively correlated with water content,was significantly negatively correlated with soil density; alkaline phosphate enzyme was significantly positively correlated with total P and water content,was significantly negatively correlated with soil density; hydrogen peroxide enzyme had no correlations with physicochemical factors. This study provides theoretical basis for the treatment of Spartina alterniflora.