doi:10.12202/j.0476-0301.2020431赵海晓¹,
高永超^1,,,
赵庆庆¹,
王加宁¹,
黄玉杰¹,
史亚微²,
潘美霖²
1.齐鲁工业大学（山东省科学院），山东省科学院生态研究所，山东省应用微生物重点实验室， 250103，山东济南
2.北京航天威科环保科技有限公司， 100071，北京
基金项目:国家自然科学基金青年科学基金资助项目（41807396），国家自然科学基金联合基金资助项目（U1806217），山东省自然科学基金资助项目（ZR2019BD007），山东省科学院青年基金资助项目（2020QN0015）

详细信息

通讯作者:高永超（1977-），男，博士，副研究员. 研究方向：湿地生态修复. E-mail：gaoyc@sdas.org

中图分类号:S157.1

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出版历程

收稿日期:2020-12-27
网络出版日期:2021-02-23
刊出日期:2021-02-01

The distribution of soil dissolved organic carbon in wetlands under different hydrological conditions in the Yellow River Delta

Haixiao ZHAO¹,
Yongchao GAO^1,,,
Qingqing ZHAO¹,
Jianing WANG¹,
Yujie HUANG¹,
Yawei SHI²,
Meilin PAN²
1. Shandong Provincial Key Laboratory of Applied Microbiology, Ecology Institute, Qilu University of Technology (Shandong Academy of Sciences), 250103, Ji'nan, Shandong, China
2. Beijing Aerospace wks Environmental Technology Co., Ltd, 100071, Beijing, China



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摘要
摘要:为了探究不同水文条件下滨海湿地土壤溶解性有机碳（DOC）的分布特征，本研究选取黄河三角洲自然保护区内的淡水芦苇湿地（FPW）、受潮汐影响的咸水芦苇湿地（TPW）、非淹水芦苇湿地（NPW）和受潮汐影响的盐地碱蓬湿地（TSW）为研究样地，在2018年10月（秋季）、2018年12月（冬季）和2019年4月（春季）采集0~25 cm深度的土壤剖面样品，测定土壤DOC和其他土壤理化性质．研究结果表明，NPW土壤DOC质量分数总体高于其他3种湿地，3个采样季节中的DOC最大平均质量分数为18.54 mg·kg^?1（冬季）．TSW、NPW、FPW和TPW土壤DOC平均质量分数分别为7.75、16.03、9.07和9.40 mg·kg^?1．沿0~25 cm土壤剖面，DOC质量分数总体呈现下降趋势，表层土壤DOC质量分数最高．主成分分析和相关性分析结果表明，土壤盐离子和土壤质地是影响湿地土壤DOC质量分数的主要因素．同时，通过三维荧光光谱对各类湿地土壤DOC来源分析表明，湿地土壤DOC来源较复杂，内生源和外部输入对不同水文条件下土壤DOC具有不同的贡献．
关键词:水文条件/
溶解性有机碳/
分布特征/
滨海湿地/
黄河三角洲
Abstract:The typical coastal wetlands including flooded freshwater-restored Phragmites australis wetland (FPW), nonflooding Phragmites australis wetland (NPW), tidal Phragmites australis wetland (TPW) and tidal Suaeda salsa wetland (TSW) were selected as sampling sites to investigate the concentration and distribution of soil dissolved organic carbon (DOC) in wetlands under different hydrological conditions．Soil samples up to a depth of 25 cm were collected in triplicates in October and December, 2018, and in April, 2019 to determine soil DOC and soil properties．DOC in soils from NPW was found to be higher than in soils of other three types of wetlands, with a maximum value of 18.54 mg·kg^?1 in the winter．Mean values of soil DOC in TSW, NPW, FPW and TPW were found to be 7.75 , 16.03 , 9.07 and 9.40 mg·kg^?1, respectively during 3 sampling seasons．Along 0-25 cm soil profile, DOC showed a generally decreasing trend in soils of four wetlands, with higher values in 0-5 cm soil．Principal component analysis (PCA) and correlation analysis showed that soil salt ions and soil texture were the main factors affecting soil DOC．Three dimensional (3D) fluorescence spectroscopic analysis indicated that DOC in soils of four wetland types all originated from various sources．Contributions of internal source and external input to soil DOC under different hydrological conditions were found to be quite different．
Key words:hydrological conditions/
dissolved organic carbon/
profile distribution/
coastal wetlands/
Yellow River Delta