绿狐尾藻生态沟渠在低温状态下对磷的去除  

Phosphorus removal in Myriophyllum aquaticum ditch under low-temperature conditions

作　　者：常小云 张树楠[2] 张苗苗[2] 肖博仁 陈均利 CHANG Xiao-yun;ZHANG Shu-nan;ZHANG Miao-miao;XIAO Bo-ren;CHEN Jun-li(College of Animal Science,Yangtze University,Jingzhou 434000,China;Key Laboratory of Agro-ecological Processes in Subtropical Regions,Changsha Research Station for Agricultural and Environmental Monitoring,Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha 410125,China;University of Chinese Academy of Sciences,Beijing 100049,China;Hunan Jiahe Breeding Intelligence Service Co.,Ltd.,Changsha 410199,China)

机构地区：[1]长江大学动物科学学院,湖北荆州434000 [2]中国科学院亚热带农业生态研究所,亚热带农业生态过程重点实验室,长沙农业环境观测研究站,长沙410125 [3]中国科学院大学,北京100049 [4]湖南佳和智农技术咨询有限公司,长沙410199

出　　处：《农业环境科学学报》2021年第4期852-858,共7页Journal of Agro-Environment Science

基　　金：湖南省自然科学青年基金项目(2020JJ5636);国家自然科学基金青年科学基金项目(41807056)。

摘　　要：为解决冬季生态沟渠磷去除效率低的问题,设置低、中、高水位下3条绿狐尾藻生态沟渠,研究不同水位下绿狐尾藻生态沟渠在低温条件下的总磷(Total phosphorus,TP)去除表现。结果表明:绿狐尾藻生态沟渠在整个冬季均有较高的除磷效果,平均TP去除率为61.9%~73.7%,且在高水位条件下,相对较高的水温和水下空间利于绿狐尾藻的生长,从而促进了TP的去除;而低水位下较高的溶氧(Dissolved oxygen,DO)浓度和根土界面利于基质对TP的吸附。根据磷质量平衡,植物吸收和沉积物吸附分别占进水TP负荷的30.27%~48.75%和18.38%~24.95%。研究表明,绿狐尾藻是一种适合种植于生态沟渠,用于磷去除的耐寒水生植物。In order to solve the problem of inefficient phosphorus removal in vegetated ditches during winter,three Myriophyllum aquaticum ditches with low,medium,and high water levels were built to study total phosphorus(TP)removal performance under lowtemperature conditions.The results showed that the M.aquaticum ditches had a high phosphorus removal effect throughout the winter,and the average TP removal rate was 61.9%~73.7%.Under high-water level conditions,relatively high water temperature and underwater space were conducive to the growth of M.aquaticum,thereby promoting the absorption of phosphorus by M.aquaticum,whereas under low-water level conditions,higher dissolved oxygen(DO)concentration and root-soil interface were conducive to adsorption of TP by sediments.According to the phosphorus mass balance,plant and sediment absorption accounted for 30.27%~48.75%and 18.38%~24.95%of the influent TP load,respectively.These results indicate that M.aquaticum is appropriate as a cold-resistant aquatic plant for TP removal in drainage ditches.

关 键 词：绿狐尾藻 生态沟渠 磷 低温 

分 类 号：X52[环境科学与工程—环境工程]