洪泽湖不同湿地类型表层土壤与沉积物碳氮含量特征分析  

Characteristics of Carbon and Nitrogen Contents in Surficial Soil and Surficial Sediment of Different Wetland Types in Hongze Lake

作　　者：卜弘毅 朱正杰 崔素珍 张明 李成之 许志敏 李典鹏 曹学城 孙天一 雷礼纲 BU Hong-yi;ZHU Zheng-jie;CUI Su-zhen;ZHANG Ming;LI Cheng-zhi;XU Zhi-min;LI Dian-peng;CAO Xue-cheng;SUN Tian-yi;LEI Li-gang(Nanjing University Research Institute(Changshu)Co.,Ltd,Suzhou 215500,Jiangsu,China;Management Office of Jiangsu Sihong Hongze Lake Wetland National Nature Reserve,Suqian 223800,Jiangsu,China;School of Life Sciences,Nanjing University,Nanjing 210046,Jiangsu,China)

机构地区：[1]南大(常熟)研究院有限公司,江苏苏州215500 [2]江苏省泗洪洪泽湖湿地国家级自然保护区管理处,江苏宿迁223800 [3]南京大学生命科学学院,江苏南京210046

出　　处：《湿地科学与管理》2025年第1期45-51,共7页Wetland Science & Management

基　　金：江苏南水北调东线湖网地区山水林田湖草沙一体化保护和修复工程子项目。

摘　　要：以江苏省泗洪洪泽湖湿地国家级自然保护区河道入湖区、湖岸区、退渔还湿区和敞水区4种湿地类型为研究对象,分析不同湿地类型间表层土壤与沉积物(0~20 cm)的总有机碳、全氮含量的变化与相互关系。结果表明:1)河道入湖区表层土壤的总有机碳含量(24.13±7.29 g·kg^(-1))显著低于湖岸区(33.47±8.43 g·kg^(-1),P<0.01),河道入湖区全氮含量(1.56±0.45 g·kg^(-1))显著低于退渔还湿区(2.24±0.69 g·kg^(-1),P<0.05),退渔还湿区C∶N(13.58±3.66)显著低于湖岸区(19.60±5.58,P<0.01)。2)退渔还湿区表层沉积物总有机碳含量最高(43.88±9.40 g·kg^(-1)),敞水区最低(29.54±16.69 g·kg^(-1));退渔还湿区全氮含量(3.08±0.95 g·kg^(-1))显著高于河道入湖区(1.63±0.80 g·kg^(-1),P<0.05)和敞水区(1.35±0.64 g·kg^(-1),P<0.01)。3)河道入湖区季节性淹水的表层土壤总有机碳含量(24.13±7.29 g·kg^(-1))显著低于常年淹水的表层沉积物(32.06±8.73 g·kg^(-1),P<0.05)。退渔还湿区季节性淹水的表层土壤总有机碳(29.92±10.89 g·kg^(-1))和全氮含量(2.24±0.69 g·kg^(-1))显著低于常年淹水的表层沉积物总有机碳含量(43.88±9.40 g·kg^(-1),P<0.01)和全氮含量(3.08±0.95 g·kg^(-1),P<0.05)。洪泽湖湿地表层沉积物总有机碳处于较丰富的水平,碳储量较高,湿地类型的变化对土壤和沉积物总有机碳、全氮含量以及C∶N的变化具有重要的影响,为优化洪泽湖湿地保护修复措施提供了科学依据。This study investigated four types of wetlands(lake areas with inflow rivers,lakeshore areas,returning fishing to wetland areas,and pelagic areas)in Jiangsu Sihong Hongze Lake Wetland National Nature Reserve to explore the relationships,and differences in total organic carbon(TOC),and total nitrogen(TN)contents of surficial(0~20 cm)soil and sediment in the four types of wetlands.The results showed that:1)TOC content of surficial soil in lake areas with inflow rivers(24.13±7.29 g·kg^(-1))was significantly lower than the content in lakeshore areas(33.47±8.43 g·kg^(-1),P<0.01).TN content of surficial soil in lake areas with inflow rivers(1.56±0.45 g·kg^(-1))was significantly lower than the content in returning fishing to wetland areas(2.24±0.69 g·kg^(-1),P<0.05).C:N of surficial soil in returning fishing to wetland areas(13.58±3.66)was significantly lower the ratio in lakeshore areas(19.60±5.58,P<0.01).2)TOC content of surficial sediment was highest in returning fishing to wetland areas(43.88±9.40 g·kg^(-1)),while the lowest was in pelagic areas(29.54±16.69 g·kg^(-1)).TN content of surficial sediment in returning fishing to wetland areas(3.08±0.95 g·kg^(-1))was significantly higher than the content in lake areas with inflow rivers(1.63±0.80 g·kg^(-1),P<0.05)and pelagic areas(1.35±0.64 g·kg^(-1),P<0.01).3)In lake areas with inflow rivers,TOC content of seasonally flooded surficial soil(24.13±7.29 g·kg^(-1))was significantly lower than the content of permanently flooded surficial sediment(32.06±8.73 g·kg^(-1),P<0.05);in returning fishing to wetland areas,TOC(29.92±10.89 g·kg^(-1)),and TN(2.24±0.69 g·kg^(-1))content of seasonally flooded surficial soil was significantly lower than the content of permanently flooded surficial sediment(TOC content 43.88±9.40 g·kg^(-1),P<0.01)(TN content 3.08±0.95 g·kg^(-1),P<0.05).TOC in surficial sediments of Hongze Lake Wetland was abundant,and the level of carbon storage was high.The types of wetlands have a significant impact on the differences of TOC,

关 键 词：土壤 沉积物 总有机碳 全氮 湿地 

分 类 号：S154.1[农业科学—土壤学] X171.1[农业科学—农业基础科学]