生态沟渠磷拦截效应对不同因子的响应特征  

Response characteristics of phosphorus interception effects to different factors in ecological ditches

作　　者：秦沂樟 白静 赵健[2] 罗琳[3] 杨延梅[1] Qin Yizhang;Bai Jing;Zhao Jian;Luo Lin;Yang Yanmei(Hehai College,Chongqing Jiaotong University,Chongqing 400074,China;Chinese Research Academy of Environmental Sciences,Beijing 100012,China;Development Research Center of the Ministry of Water Resource of China,Beijing 100038,China)

机构地区：[1]重庆交通大学河海学院,重庆400074 [2]中国环境科学研究院,北京100012 [3]水利部发展研究中心,北京100038

出　　处：《农业工程学报》2022年第S01期122-130,共9页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家重点研发计划项目-流域面源污染防控技术综合试点示范(2021YFC3201505-04);中央财政科技计划结余经费(2021YSKY-05)。

摘　　要：生态沟渠是中国南方地区农业面源重要拦截磷污染的措施,受生态沟渠自身特征和环境因子影响,不同研究中生态沟渠对磷的去除效率差异较大。通过文献检索平台CNKI和Web of Science,收集研究磷在生态沟渠迁移转化过程的文献,经过筛选后,建立生态沟渠磷迁移数据库,共包含334项数据,通过统计分析系得到生态沟渠对总磷(Total Phosphorus,TP)的平均去除效率为47.16%。基于Mann-Whitney U检验和K-W检验方法,分析不同因素(植被类型、沟渠材质类型、强化措施、气候温度、水力停留时间)对生态沟渠TP去除效率的影响。研究结果表明:不同植被类型中,多种人工植被的生态沟渠去除效果最好,其TP平均去除效率为53.93%;不同沟渠材质中,边坡半衬砌的生态沟渠的TP平均去除效率为58.22%,效果最佳;不同强化措施类型中,基质类更有助于提高生态沟渠对TP的去除效果,其去除平均去除效率达到53.53%;不同气候温度区间中,温度在>25~35℃时生态沟渠对TP去除效率最高,平均值为57.18%;不同水力停留时间条件下,超过24 h时生态沟渠对TP的平均去除效率最佳,达到72.12%。该研究成果可为中国南方生态沟渠磷拦截效应评估、沟渠设计提供技术支撑。Due to the extensive use of chemical fertilizers in agriculture in southern China,the utilization rate of phosphorus is low and the agricultural non-point source pollution is serious.The ecological ditch is an important measure to intercept nitrogen and phosphorus pollution from agricultural non-point sources.Influenced by the characteristics of ecological ditches and environmental factors,the removal efficiency of ecological ditches in different studies varies greatly.Through the literature retrieval platform CNKI and Web of Science,relevant literatures on the migration and transformation process of phosphorus in ecological ditches were collected.After screening under the following conditions(dynamic experiments,outdoor single ecological ditches,etc.),a database of ecological ditches was established,which contained a total of 81 experiments and 334 items of data.Statistical analysis showed that the average removal efficiency of Total Phosphorus(TP)by ecological ditches was 47.16%.Based on the Mann-Whitney U test and K-W test,the effects of different factors(vegetation type,ditch material type,strengthening measures,climate temperature,and hydraulic retention time)on the TP removal efficiency of ecological trenches were analyzed.The results showed that there were significant differences in the TP removal efficiency of ecological ditches covered with different vegetation.The TP removal efficiency of ecological ditches covered with selected vegetation was better than that of ecological ditches covered with natural vegetation,and the average removal efficiency was 47.97%.The TP removal efficiency of ecological ditches covered with different detailed vegetation types was different.The TP removal efficiency of ecological ditches covered with various selected vegetation was significantly higher than that of ecological ditches covered with single selected vegetation,various natural vegetation and single natural vegetation,and the average removal efficiency was 53.93%.There were significant differences in the TP removal

关 键 词：生态沟渠 农业面源 磷 营养盐 Mann-Whitney U检验 K-W检验 

分 类 号：X171.4[环境科学与工程—环境科学]