生态与农村环境学报2024，Vol.40Issue(4)：478-489,12.DOI:10.19741/j.issn.1673-4831.2023.0111
九龙江流域丰枯水期表层水体氮污染特征及其来源解析
Characterization of Nitrogen Pollution in Surface Water during Wet and Dry Seasons and Its Sources Apportion-ment in Jiulong River Watershed,China
摘要
Abstract
Nitrogen pollution is one of the most serious water environmental problems in watershed water pollution control.It is of great theoretical and practical significance to study the characteristics and sources of nitrogen pollution in typical ag-ricultural watersheds in southeast China under the multiple impacts of human activities and climate change.To explore the nitrogen pollution pattern and pollution source of surface water in Jiulong River Watershed,this study carried out multi-point and multi-section in situ observation of surface water in the whole watershed during wet(July)and dry(January)periods of Jiulong River Watershed.Positive Matrix Factorization was used to analyze the sources and contribution rates of nitrogen pollution of surface water under different water seasons.Coupling correlation statistical analysis method was used to clear the key factors of nitrogen pollution of surface water under different water seasons.The results show that the char-acteristics of nitrogen pollution of surface water in Jiulong River Watershed had obvious water season differentiation.The concentration of TN ranged from 0.72-13.14 mg·L-1,which was 1.39-10.95 mg·L-1 in wet season and 0.72-13.14 mg·L-1 in dry season.NO3--N,NH4+-N,NO2--N and DON concentrations were higher in wet season than those in dry season,but PN concentration was higher in dry season than that in wet season.NO3--N,NH4+-N and DON were the main forms of nitrogen pollution in wet season,and NO3--N,DON and PN were the main forms of nitrogen pollution in dry sea-son.PMF model analysis of nitrogen pollution sources in surface water show that agricultural non-point source pollution,domestic sewage,biological residue,microorganisms and mineral particles in the river were the main sources of nitrogen pollution in the watershed during wet season,while agricultural fertilizer pollution,urban industrial sewage discharge and suspended micro-particle of biological residue in the river during the dry season were the main sources of nitrogen pollution in the watershed water.The results of the study can strengthen the understanding that nitrogen pollution of surface water in Jiulong River Watershed is affected by agricultural production activities and runoff changes.The study has also put forward the idea that the source control of nitrogen pollution from agricultural and industrial production and the water season differ-entiation of nitrogen pollution can be effectively brought into the comprehensive management of nitrogen pollution in Jiulong River Watershed.关键词
氮/源解析/污染负荷/九龙江流域Key words
nitrogen/source apportionment/pollution load/Jiulong River Watershed分类
资源环境引用本文复制引用
董浩,郑恭毅,余居华,张银龙,王利民,郑祥洲,钟继承,王煌平,丁洪,张玉树..九龙江流域丰枯水期表层水体氮污染特征及其来源解析[J].生态与农村环境学报,2024,40(4):478-489,12.基金项目
国家自然科学基金(51709183) （51709183）
中国博士后科学基金(2017M611862) （2017M611862）
福建省科技计划项目(2020R1025001) （2020R1025001）
福建省农业科学院科研项目(YC2019007,ZYTS2019016,ZYTS202218) （YC2019007,ZYTS2019016,ZYTS202218）
福建省农业科学院科技创新团队项目(CXTD2021012-2) （CXTD2021012-2）
福建省农业科学院对外合作项目(DEC2019-05,DWHZ-2022-11) （DEC2019-05,DWHZ-2022-11）
