Nitrogen and Phosphorus Pollutants Removal from Rice Field Drainage with Ecological Agriculture Ditch: A Field Case

作     者：Lina Chen Wenshuo Zhang Junyi Tan Xiaohou Shao Yaliu Qiu Fangxiu Zhang Xiang Zhang 

作者机构：College of Agricultural EngineeringHohai UniversityNanjing210098China Key Laboratory of Lower Yellow River Channel and Estuary RegulationMinistry of Water ResourcesZhengzhou450003China Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of EducationCollege of EnvironmentHohai UniversityNanjing210098China College of EnvironmentHohai UniversityNanjing210098China Jiangsu Engineering Consulting CenterNanjing210000China Yellow River Institute of Hydraulic ResearchZhengzhou450003China Gaochun Water Resources Management CenterNanjing211300China 

出 版 物：《Phyton-International Journal of Experimental Botany》 (国际实验植物学杂志（英文）)

年 卷 期：2022年第91卷第12期

页      面：2827-2841页

核心收录：

学科分类：0202[经济学-应用经济学] 02[经济学] 020205[经济学-产业经济学] 

主　　题：Paddy field ecological ditches nitrogen phosphorus 

摘      要：Excessive nitrogen and phosphorus in agricultural drainage can cause a series of water environmental problems such as eutrophication of water bodies and non-point source *** monitoring the water purification effect of a paddy ditch wetland in Gaochun,Nanjing,Jiangsu Province,we investigated the spatial and temporal distribution patterns of N and P pollutants in paddy drains during the whole reproductive period of ***,the dynamic changes of nitrogen and phosphorus in time and space during the two processes of rainfall after basal fertilization and topdressing were analyzed after *** last,the effect of the ditch wetland on nutrient purification and treatment mechanism,along with changing flow and concentration in paddy drains,was *** results of this study showed that the concentrations of various nitrogen and phosphorus in the ditch basically reached the peak on the second and third days after the rainfall(5.98 mg/L for TN and 0.21 mg/L for TP),which provided a response time for effective control of nitrogen and phosphorus *** drainage can be purified by the ecological ditch,about 89.61%,89.03%,89.61%,98.14%,and 79.05%of TN,NH4+-N,NO3−-N,NO2−-N,and TP *** is more effective than natural ditches for water purification with 80.59%,40%,12.07%,91.06%and 18.42%removal rates,*** results of the study can provide a theoretical basis for controlling agricultural non-point source pollution and improving the water environment of rivers and lakes scientifically.