黄土寨沟冬季底泥中氮素及微生物的分布  

Distribution of Nitrogen and Microorganism in Sediments of Huangtuzhai River in Winter

作　　者：曲朝辉[1] 林陶[1] 夏品华[1] 张俊美[1] 

机构地区：[1]贵州师范大学贵州省山地环境信息系统和生态环境保护重点实验室,贵州贵阳550001

出　　处：《贵州农业科学》2014年第11期240-243,共4页Guizhou Agricultural Sciences

基　　金："两湖一库"周边污染沟渠综合治理关键技术研究与工程示范项目"面源污染型黄土寨沟生态治理研究示范"[筑科合同(2011103)70]

摘　　要：为给贵州冬季自然或人工湿地净化效益评价和退化生态系统修复提供参考,选取贵州红枫湖入湖河流黄土寨沟为研究对象,分析测定其底泥中氨化细菌、亚硝酸细菌、硝酸细菌、反硝化细菌、总氮(TN)、氨氮(NH4+-N)和硝酸盐氮(NO3--N)和其上覆水、间隙水中TN、NH4+-N、NO3--N的含量,并对其相关性进行分析。结果表明:冬季黄土寨沟河水和底泥中氮素以NH4+-N为主,底泥中氮的4种微生物的数量关系为氨化细菌>反硝化细菌>硝酸细菌>亚硝酸细菌,氨化细菌数量与间隙水中NH4+-N呈显著正相关(r=0.810,P<0.05),反硝化细菌数量与上覆水中NO3--N呈显著负相关(r=0.798,P<0.05)。解释了冬季黄土寨沟从上游至下游总氮一直升高的原因:反硝化细菌呈下降趋势,反硝化过程受阻。The concentration of ammonifying bacteria,nitrite bacteria,nitrate bacteria,denitrifying bacteria,TN,NH4^＋-N and NO3^--N in the sediments of Huangtuzhai River,and the content of TN、NH4^＋-N、NO3^--N in its overlying water and interstitial water were determined and their correlations were analyzed to provide a reference for purification benefit evaluation and degraded ecosystem restoration of natural and artificial wetlands in winter in Guizhou.NH4^＋-N is the main nitrogen in the sediments and river water of Huangtuzhai River.The quantity of four bacteria is ammonifying bacteria denitrifying bacteria nitrate bacteria nitrite bacteria.There is a significant positive correlation（r=0.810,P0.05）between quantity of ammonifying bacteria and NH4^＋-N in the interstitial water.There is a significant negative correlation（r=0.798,P0.05）between quantity of denitrifying bacteria and NO3^--N in the overlying water.The reason to cause higher TN content in Huangtuzhai River from upstream to downstream is that the denitrification process is blocked because the quantity of denitrifying bacteria decreases in winter.

关 键 词：底泥 氮形态 氮细菌 微生物 

分 类 号：S141.6[农业科学—肥料学]