衡水湖沉积物中不同形态氮、磷分布特征  

Distribution Characteristics of Nitrogen and Phosphorus in Sediments of Hengshui Lake

作　　者：石宗琳 温冰欣 周文杰[1] 于祖爱 刘璐 孙文博 张莹 SHI Zonglin;WEN Bingxin;ZHOU Wenjie;YU Zuai;LIU Lu;SUN Wenbo;ZHANG Ying(a.Department of Life Science,Hengshui University,Hengshui,Hebei 053000,China;Hebei Key Laboratory of Wetland Ecology and Conservation,Hengshui University,Hengshui,Hebei 053000,China)

机构地区：[1]衡水学院生命科学学院,河北衡水053000 [2]衡水学院河北省湿地生态与保护重点实验室,河北衡水053000

出　　处：《衡水学院学报》2025年第1期7-12,共6页Journal of Hengshui University

基　　金：中央引导地方科技发展基金项目(226Z4202G);河北省高等学校青年拔尖人才计划项目(BJ2021094);衡水市科技计划项目(2022014033Z);河北省湿地保护与绿色发展协同创新中心专项课题(2022XJZX34);河北省湿地生态与保护重点实验室自主课题基金项目(hklz201905);衡水学院校级科研项目(2024ZRZ02)。

摘　　要：选取衡水湖14个具有代表性点位的沉积物样品,分析沉积物中总有机碳(TOC)、总磷(TP)、速效磷、pH以及不同形态氮、磷的分布特征。结果表明:衡水湖沉积物中TOC的平均含量为20.29 g/kg,pH平均值为7.77,呈弱碱性。不同形态氮的平均含量为SAEF-N(0.06±0.02 mg/g)<IEF-N(0.15±0.03 mg/g)<SOEF-N(0.22±0.09 mg/g)<WAEF-N(0.73±0.21 mg/g),SOEF-N中NO_(3)^(-)-N占主导地位,其他三种形态氮中NH_(4)^(+)-N占主导地位。TP的平均含量为1.36 g/kg,属于中等以上污染水平,速效磷的平均含量为15.96 mg/kg,不同形态磷的平均含量为Ca-P(129.40 mg/kg)<O-P(117.61 mg/kg)<NH4Cl-P(56.10 mg/g)<Fe-P和Al-P(35.74 mg/kg),衡水湖沉积物中磷释放的风险相对较低,氮存在一定释放的风险。Sediment samples from 14 representative sites in Hengshui Lake as the research object to analyze the change characteristics of total organic carbon(TOC),total phosphorus(TP),available phosphorus,pH,and different forms of nitrogen and phosphorus in the sediments.The results showed that the average TOC content and pH value in Hengshui Lake sediments were 20.29±0.62g/kg and 7.77±0.14 respectively,showing a weak alkalinity.The average nitrogen content of different forms was as follows:strong base extractable nitrogen(SAEF-N,0.06mg/g,46.54%)<ion exchange nitrogen(IEF-N,0.15mg/g,17.59%)<strong oxidizer extractable nitrogen(SOEF-N,0.22mg/g,38.86%)<weak acid extractable nitrogen(WAEF-N,0.73mg/g,28.82%).NO_(3)^(-)-N was dominated in SOEF-N,and NH_(4)^(+)-N was dominated in the other three forms of nitrogen.The average content of TP was 1.36g/kg,which belonged to the above medium pollution level,and the average content of available phosphorus was 15.96mg/kg.The average content of phosphorus in different forms was calcium bound phosphorus(Ca-P,129.40mg/kg)<closed storage phosphorus(O-P,117.61mg/kg)<weakly adsorbent phosphorus(NH4Cl-P,56.10 mg/g)<the sum of Fe-bound phosphorus(Fe-P)and Al-bound phosphorus(Al-P)(35.74mg/kg).In summary,the risk of phosphorus release in Hengshui Lake sediments was relatively low,and there was a certain risk of nitrogen release.

关 键 词：衡水湖 沉积物 磷形态 氮形态 湿地生态 

分 类 号：X524[环境科学与工程—环境工程]