黄河三角洲湿地硝化作用强度及影响因素研究  

STUDIES OF NITRIFYING ACTIVITY AND IMPACT FACTORS OF WETLAND IN YELLOW RIVER DELTA

作　　者：吕艳华[1] 白洁[1] 姜艳[1] 于江华[1] 

机构地区：[1]中国海洋大学海洋环境与生态教育部重点实验室

出　　处：《海洋湖沼通报》2008年第2期61-66,共6页Transactions of Oceanology and Limnology

基　　金：山东省环保局重点基金(2004040-1);物理海洋教育部重点实验室开放课题基金(200302);国家重点基础研究发展计划(973计划)项目(2006CB400602)资助

摘　　要：采用现场调查和实验室培养的方法,研究了黄河三角洲滨海湿地不同环境氨氧化细菌分布、硝化强度及影响因素,结果表明:5个不同生态环境中氨氧化细菌数量和硝化强度差别较大。氨氮浓度、盐度、温度、pH对硝化强度均有明显影响。硝化强度随着氨氮浓度的增加而增大;低盐度条件下,含盐量的变化对土壤的硝化强度影响不明显,高盐度条件下,硝化作用明显受到抑制;硝化作用最适宜的温度是28℃左右,低温限制硝化作用的进行;在偏碱性的环境中硝化强度较强,较低的pH严重抑制硝化作用。The distribution of AOB and effects of different environmental factors on the nitrifying activity of soils that from Yellow River Delta were studied in laboratory. It was found that the number of AOB were different in different environment. All of NH＋-N concentration, salinity, temperature and pH has influences on nitrifying activity. With the increasing of NH＋-N concentration, the nitrifying intensity increased, too. Nitrification was not sensitive for the salinity increasing at lower salinities. But nitrification was inhibited when salinity was too high. The optimum temperature for nitrification was 28℃ or so and low temperature inhibited nitrification. Alkaline condition is more favorable than acidic condition for nitrification. Low pH significantly inhibited nitrification of bacteria.

关 键 词：滨海湿地 硝化细菌数量 硝化强度 影响因素 

分 类 号：P731.2[天文地球—海洋科学]