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巢湖滨岸水塘洼地沉积物反硝化速率及对外源碳氮的响应
引用本文:李如忠,王莉,刘超.巢湖滨岸水塘洼地沉积物反硝化速率及对外源碳氮的响应[J].环境科学,2020,41(4):1684-1691.
作者姓名:李如忠  王莉  刘超
作者单位:合肥工业大学资源与环境工程学院,合肥230009;合肥工业大学纳米矿物与污染控制安徽普通高校重点实验室,合肥230009,合肥工业大学资源与环境工程学院,合肥230009;合肥工业大学纳米矿物与污染控制安徽普通高校重点实验室,合肥230009,合肥工业大学资源与环境工程学院,合肥230009;合肥工业大学纳米矿物与污染控制安徽普通高校重点实验室,合肥230009
基金项目:国家自然科学基金项目(51579061)
摘    要:2018年10月至2019年8月,在巢湖西半湖北侧滨岸筛选3个典型水塘洼地,采集表层沉积物及上覆水样,开展外源碳氮浓度梯度培养实验,解析底质反硝化速率对碳氮的限制性,并识别主要环境影响因素.结果表明:①洼地蒲草、水塘芦苇、水塘蒲草等3种植物丛沉积物对照样的反硝化速率mg·(kg·h)-1]分别为2.15~10.87(均值为6.47)、2.08~10.65(均值为6.97)、2.06~10.88(均值为6.76),彼此间差异性不显著;②总体上,外源氮(硝态氮)的添加可以明显提高沉积物的反硝化速率,表明硝态氮为反硝化过程的限制性因素;③外源碳(葡萄糖)的添加导致植物丛沉积物反硝化速率明显下降,表明有机碳对沉积物反硝化产生了抑制作用;④外源碳氮同时添加明显提高了沉积物反硝化速率,除10月洼地蒲草丛和6月水塘蒲草丛低碳氮浓度沉积物反硝化速率相对较高以外,其它情形均表现为高碳氮浓度沉积物反硝化速率更高.

关 键 词:水塘洼地  反硝化速率  外源碳氮  限制性因素  巢湖
收稿时间:2019/10/18 0:00:00
修稿时间:2019/11/6 0:00:00

Sediment Denitrification Rate and Its Response to Exogenous Carbon and Nitrogen in the Ponds and Bottomland of the Chaohu Lakeshore Zone
LI Ru-zhong,WANG Li and LIU Chao.Sediment Denitrification Rate and Its Response to Exogenous Carbon and Nitrogen in the Ponds and Bottomland of the Chaohu Lakeshore Zone[J].Chinese Journal of Environmental Science,2020,41(4):1684-1691.
Authors:LI Ru-zhong  WANG Li and LIU Chao
Institution:School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China;Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei 230009, China,School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China;Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei 230009, China and School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China;Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei 230009, China
Abstract:
Keywords:ponds and bottomland  denitrification rates  exogenous carbon and nitrogen  influencing factors  Lake Chaohu
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