升钟湖冬季氮和磷内源静态释放风险初探  

Preliminary Study on Static Release Risk of Endogenous Nitrogen and Phosphorus of Shengzhong Lake in Winter

作　　者：宋琳 冯晓玉 万佳璐 陈超 徐飞 张拓 张富斌 SONG Lin;FENG Xiao-yu;WAN Jia-lu;CHEN Chao;XU Fei;ZHANG Tuo;ZHANG Fu-bin(College of Environmental Science and Engineering,China West Normal University,Nanchong 637009,China;Southwest Branch of the National Freshwater Fishery Engineering Technology Research Center,China West Normal University,Nanchong 637009,China;Key Laboratory of Southwest China Wildlife Resources Conservation of Ministry of Education,China West Normal University,Nanchong 637009,China;College of Environment,Sichuan Agricultural University,Chengdu 611130,China)

机构地区：[1]西华师范大学环境科学与工程学院,四川南充637009 [2]西华师范大学国家淡水渔业工程技术研究中心(武汉)西南分中心,四川南充637009 [3]西华师范大学西南野生动植物资源保护教育部重点实验室,四川南充637009 [4]四川农业大学环境学院,成都611130

出　　处：《长江科学院院报》2023年第3期52-59,共8页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(41807458);成都市水生态文明建设研究重点项目(SST2019-2020-06)。

摘　　要：为探究升钟湖冬季氮和磷的内源静态释放风险及释放规律,于2018年冬季在升钟湖湖区设置了15个采样点,采集了各样点的水样和沉积物样品,测定了水体常规理化指标及沉积物间隙水氮、磷含量,并进行了沉积物氮、磷室内模拟静态释放试验。结果表明:①升钟湖沉积物间隙水总氮(TN)含量在1.846~5.293 mg/L之间,氨氮(NH_(4)^(+)-N)是主要形态,含量在0.437~3.603 mg/L之间,硝态氮(NO_(3)^(-)-N)次之,含量在0.545~1.452 mg/L之间,各形态氮、磷具有较为明显的空间分布差异。②升钟湖沉积物间隙水总磷(TP)含量在0.194~0.561 mg/L之间,其中溶解性正磷酸盐(PO_(4)^(3-)-P)含量在0.029~0.417 mg/L之间。③升钟湖在冬季存在氮和磷的内源静态释放,相对而言,磷的释放风险更大,释放规律更加明显,而氮的释放主要是通过硝态氮(NO_(3)^(-)-N)的形式进行,基本不进行氨氮(NH_(4)^(+)-N)的释放,湖泊中心区域氮、磷的内源释放风险低于其他区域。研究成果可为升钟湖的管理政策实施及其水资源的可持续利用提供科学依据。The aim of this research is to explore the risk and law of endogenous static release of nitrogen and phosphorus of Shengzhong Lake in winter.In the winter of 2018,water samples and sediment samples were collected from 15 sampling sites in Shengzhong Lake.The conventional physical and chemical indexes of water body and the nitrogen and phosphorus content in sediment interstitial water were determined.Meanwhile,the endogenous static release of nitrogen and phosphorus in sediments were simulated in laboratory.Results unveil that i)the total nitrogen content in the sediment interstitial water of Shengzhong Lake ranges from 1.846 mg/L to 5.293 mg/L.Ammonia nitrogen is the dominant form of total nitrogen,reaching 0.437-3.603 mg/L,followed by nitrate nitrogen,at 0.545-1.452 mg/L.Various forms of nitrogen and phosphorus differ remarkably in spatial distribution.ii)The content of total phosphorus in interstitial water is ranged from 0.194 mg/L to 0.561 mg/L,of which the content of dissolved orthophosphate stands between 0.029 mg/L and 0.417 mg/L.iii)Endogenous static release of nitrogen and phosphorus was observed in the Shengzhong Lake in winter.The risk of phosphorus release is greater and its release regularity is more obvious;whereas nitrogen mainly releases in the form of nitrate nitrogen,and ammonia nitrogen barely releases.The risk of endogenous release of nitrogen and phosphorus in the central area of the lake is lower than that in other areas.The research findings offer scientific basis for the implementation of management policies and sustainable utilization of water resources in the Shengzhong Lake.

关 键 词：沉积物 间隙水 氮 磷 静态释放 升钟湖 

分 类 号：X524[环境科学与工程—环境工程]