Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (10): 92-96.doi: 10.11924/j.issn.1000-6850.casb2021-0444

Special Issue: 土壤重金属污染 现代农业发展与乡村振兴

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Analysis of Nitrogen and Phosphorus Pollution in Water and Sediment of Black and Odorous Water Bodies in Rural Area of Chongqing

MA Jie(), JIANG Yue, ZHANG Xiu(), WANG Jian   

  1. Ecological and Environmental Monitoring Center of Chongqing/ Rural Ecology and Soil Monitoring Technology Research Center, Chongqing 401147
  • Received:2021-04-25 Revised:2021-07-10 Online:2022-04-05 Published:2022-05-23
  • Contact: ZHANG Xiu E-mail:pony312@qq.com;704671443@qq.com

Abstract:

This study analyzed the data of water quality and nitrogen and phosphorus in sediment from 84 black and odorous water bodies in rural area of Chongqing, and evaluated the current situation of pollution in water and sediment by comprehensive pollution index method and organic index method. The results show that 87% of black and odorous water bodies have nitrogen and phosphorus pollution, and 50% have excessive nitrogen and phosphorus at the same time, the nitrogen pollution is more serious in brooks and ditches than that in pond. The sediments are 100% polluted by TN, ON and TP, and 70.2% polluted by organic pollutants. There is a significantly positive correlation among the indicators of TN, TP and NH3-N. OM, TN and TP in the sediment show no significant correlation between each other. In general, the black and odorous water bodies in rural area of Chongqing are mainly polluted by exogenous sources.

Key words: black and odorous water body, water quality, sediment, evaluation, rural area

CLC Number: