闽江河口短叶茳芏湿地及围垦后的养虾塘N<sub>2</sub>O通量比较

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摘要

以闽江河口鳝鱼滩的短叶茳芏湿地及其转化而成的养虾塘为研究对象，于2016年5~11月，采用静态箱-气相色谱法和悬浮箱-气相色谱法分别对白天短叶茳芏湿地和养虾塘水-气界面N₂O通量进行观测，并同步测定短叶茳芏湿地间隙水化学指标和养虾塘水体理化指标.结果表明，观测期间短叶茳芏湿地和养虾塘水-气界面N₂O通量变化范围分别为-113.11~206.57μg/（m²·h）和-2.27~143.25μg/（m²·h），均值分别为（38.35±24.44）μg/（m²·h）和（46.44 ±15.93）μg/（m²·h），整体均表现为大气中N₂O的排放源，但两者N₂O通量无显著差异（P>0.05）.短叶茳芏湿地N₂O通量与土壤间隙水的盐度和营养盐呈显著正相关（P<0.05），养虾塘水-气界面N₂O通量与水深、水体盐度和营养盐含量均呈极显著正相关关系（P<0.01）.

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关键词 ： N₂O通量, 潮汐沼泽, 养虾塘, 土地利用变化, 闽江河口

Abstract：

Temporal variations of the N₂O flux from the Cyperus malaccensis marsh ecosystem and at the water-air interface of the shrimp pond converted from C. malaccensis marsh were determined using static chamber and floating chamber technique from May 2016 to November 2016 in the Shanyutan Wetland of the Min River estuary, Southeast China. The pore water chemical parameters in the C. malaccensis marsh and the water column physical, chemical parameters of the shrimp pond were measured simultaneously. N₂O flux from the C. malaccensis marsh and at the water-air interface of the shrimp pond ranged from -113.11 to 206.57μg/(m²·h) and from -2.27 to 143.25μg/(m²·h), respectively, with the average values of (38.35±24.44)μg/(m²·h) and (46.44±15.93)μg/(m²·h), respectively. Both C. malaccensis marsh and shrimp pond functioned as a source of atmosphere N₂O. The N₂O flux from the C.malaccensis marsh was significant positive correlated with salinity and nutrient content of pore water, and the N₂O flux at the water-air interface of the shrimp pond was significant positive correlated with water depth, salinity and nutrient content of water column.

Key words： N₂O flux tidal marsh shrimp pond land-use changes Min River estuary

收稿日期: 2017-03-16

PACS:

X171.1

基金资助:

国家自然科学基金资助项目（41671088）；国家科技基础性工作专项课题（2013FY111805）；福建省基本科研专项重点项目（2014R1034-1）；福建师范大学地理科学学院研究生科研创新项目（GY201601）

通讯作者: 仝川,教授,tongch@finu.edu.cn;杨平,研究助理,yangping528@sian.cn E-mail: tongch@finu.edu.cn;yangping528@sian.cn

作者简介: 谭立山(1992-),男,广东惠州人,福建师范大学硕士研究生,主要从事湿地生态研究.发表论文1篇.

引用本文:

谭立山, 杨平, 徐康, 陈坤龙, 黄佳芳, 仝川. 闽江河口短叶茳芏湿地及围垦后的养虾塘N₂O通量比较[J]. 中国环境科学, 2017, 37(10): 3929-3939. TAN Li-shan, YANG Ping, XU Kang, CHEN Kun-long, HUANG Jia-fang, TONG Chuan. Comparison of N₂O flux following brackish Cyperus malaccensis marsh conversion to shrimp pond in the Min River estuary. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(10): 3929-3939.

链接本文:

http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2017/V37/I10/3929

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