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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。
Spatial substitution of time, combined with analysis of variance, multiple comparisons and Pearson correlation analysis and other methods, on the coastal wetland in Fujian Province Spartina alterniflora invasion at different stages of the community type (Kurume mangrove community, autumn canopy mangrove - Spartina alterniflora community, mutual Spartina alterniflora and Photon Beach) were analyzed in order to explain the soil mechanism of the success of Spartina alterniflora. The results showed that Spartina alterniflora invasion increased the soil density, reduced the soil p H and water content, and decreased the content of soil organic carbon, organic matter, total nitrogen and total phosphorus. The invasion of Spartina alterniflora increased the activity of sucrase, alkaline phosphatase and catalase in the coastal wetland of Min-dong and decreased the soil urease activity. Correlation analysis showed that there was a close relationship between soil enzyme activity and soil physico-chemical factors. There was a significant positive correlation between soil enzyme activity and total nitrogen, total phosphorus and water content, and significant negative correlation with soil density. Urease had a significant positive correlation with water content Soil density was significantly and negatively correlated. Alkaline phosphatase was significantly and positively correlated with total phosphorus and water content, and negatively correlated with soil density. There was no correlation between catalase and physico-chemical factors. This study provides a theoretical basis for the control of Spartina alterniflora.