摘要
基于模拟试验,通过对比分析氮素含量在有/无泥鳅活动时的差异,探讨了底栖鱼类对水田上覆水中氮素动态的生物扰动效应。结果表明,泥鳅对水田上覆水中氮素动态具有强烈的扰动作用。泥鳅扰动组上覆水中氨氮和硝态氮含量在整个试验期间均高于对照组。泥鳅扰动对上覆水中亚硝态氮含量的影响未表现出明显的规律性,但显著增加了溶解性无机氮和总氮的含量。在试验前期扰动组上覆水中氨氮/总氮比值高于对照组,在试验中、后期则低于对照组。试验期间扰动组上覆水中溶解性无机氮/总氮比值明显高于对照组,说明泥鳅扰动显著增加了水田上覆水中溶解性无机氮占总氮的比例。
Bioturbation effect of benthic fish, e.g. Misgurnus anguillicaudatus, on nitrogen dynamic in paddy field surface water and its mechanism was investigated through a simulation experiment analyzing comparatively nitrogen contents in waters with and without Misgurnus anguillicaudatus. Misgurnus anguillicaudatus showed strong bioturbation effect. Throughout the experiment, NH4^＋-N and NO3-N concentrations remained higher in the bioturbation group than in the control group, while NO2^--N concentration did not show any obvious rules. In the early stage of the experiment NH4^＋-N/TN ratio was higher in the bioturbation group than in the control group,while in the middle and late stages of the experiment it turned reversely. DIN/TN ratio was markedly higher in the bioturbation group than in the control group. Misgurnus anguillicaudatus bioturbation increased remarkably DIN and TN concentrations in paddy field surface water.
出处
《生态与农村环境学报》
CAS
CSSCI
CSCD
北大核心
2009年第2期39-43,共5页
Journal of Ecology and Rural Environment
基金
吉林省人才开发资金
吉林省科技发展计划(20060577)
吉林省教育厅科技计划(2006113
2007169)
教育部留学回国人员科研启动基金(教外司留2005-546)
人事部留学人员科技活动择优资助项目
东北师范大学自然科学青年基金(20050406)
关键词
泥鳅
水田
生物扰动
氮素
田面水
Misgurnus anguillicaudatus
paddy field
bioturbation
nitrogen
surface water
