生态学报2017，Vol.37Issue(1)：177-183,7.DOI:10.5846/stxb201607281538
闽江河口短叶茳芏群落湿地沉积物反硝化强度对盐度的响应
Response of denitrification intensity to salinity concentrations in Cyperus Malaccensis Sediments of the Min River Estuary
摘要
Abstract
An undisturbed sediment column sample covered by Shichito matgrass (Cyperus malaccensis) in the Shanyutan and Daoqingzhou wetland of the Min River estuary was selected to research the effects of salinity on the denitrification process of the wetland sediment in July 2015.Using the sealed anaerobic culture method,the denitrification rates,which varied with the culture time in different salinity conditions,were calculated.At the initial stage,from low salinity to high salinity culture conditions,the denitrification rates of the sediments in the Shanyutan wetland were (15.5±1.38),(4.28± 8.46),and (12.94±0.24) mg kg-1 d-1,respectively.The values in the Daoqingzhou wetland,however,were (31.93± 4.89),(30.66±5.375) and (36.69±3.44) mg kg-1 d 1,respectively.The decreased amplitudes of the denitrification rates after 10 days in 0 and 10 salinity conditions were 36.97％,and 53.01％,respectively,of the amplitudes after 5 days.The values were higher compared with 22.64％ and 28.84％ in the Daoqingzhou wetland.In the late culture stage,the denitrification rates showed decreasing trends down to zero.The denitrification activities in the Shanyutan and Daoqingzhou wetlands both showed trends of increasing.The variation ranges in the Shanyutan and and Daoqingzhou wetland were 95.6％-99.8％ and 90.0％-96.7％,respectively.During the entire training period,the denitrifying activity in the Shanyutan wetland was higher than that in the Daoqingzhou wetland.The results reflected that the salinity had an inhibition effect on the denitrification rate of the sediment in the Min River estuary wetland.关键词
反硝化作用/盐度/沉积物/闽江口湿地Key words
denitrification/salinity/sediment/the Min River estuary wetland引用本文复制引用
李家兵,张宝珠,朱雨晨,丁晓燕,谢蓉蓉,仝川..闽江河口短叶茳芏群落湿地沉积物反硝化强度对盐度的响应[J].生态学报,2017,37(1):177-183,7.基金项目
国家科技基础性工作专项(2013FY111800) （2013FY111800）
国家自然科学基金(51541906) （51541906）
福建省基本科研专项重点项目(2014R1034-1) （2014R1034-1）
福建省科技厅省属公益类科研专项(2016R1032-1) （2016R1032-1）
福建省教育厅(JA14088) （JA14088）
福建省科技厅重点项目(2015R0099) （2015R0099）
