【摘要】 利用多年在长江河口滨岸湿地开展相关研究工作获得的反硝化速率和各类环境参数数据,对数据进行归纳整理,采用相关性分析和主成分分析,将沉积物反硝化作用和环境因素间的相关性进行量化,并筛选出影响长江口沉积物反硝化作用的两大重要因素。研究表明沉积物反硝化速率和温度（T）、沉积物有机碳（SOC）、总氮（STN）呈现Pearson正相关关系（p70.01,p70.05,和p70.05）,与水中盐度（S）、溶解氧（DO）及沉积物C/N呈明显负相关关系（p70.05,p70.05,和p70.01）。尽管沉积物中的N₂O自然产生速率和环境参数间没有表现出相关性,但沉积物的反硝化速率和N₂O的自然产生速率却和C/N呈明显负相关（p70.01）。主成分分析结果表明温度和盐度是影响长江口潮滩沉积物反硝化速率的两大主导因素,同时也是亚热带季风河口的主要环境参数。更多还原

【Abstract】 Studies on denitrification rate in sediment of the coastal area of the Yangtze estuary were described with focuses on the influence of environmental factors including temperature(T),sediment organic carbon(SOC) and sediment total nitrogen(SON),as well as salinity(S) and DO in water.Pearson correlation analysis showed denitrification rate was positively correlated with T,SOC and SON,while being negatively correlated with S and DO of water and C/N in sediment. The principal component analysis indicated that both T and S,being the main environmental parameters in the estuaries of the subtropical monsoon area,also were the main factors governing the denitrification rate in sediment of the Yangtze estuarine tidal flat.更多还原