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| Phosphorus removal in Myriophyllum aquaticum ditch under low-temperature conditions |
| Received:October 16, 2020 |
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| KeyWord:Myriophyllum aquaticum;vegetated drainage ditch;phosphorus;low temperature |
| Author Name | Affiliation | E-mail | | CHANG Xiao-yun | College of Animal Science, Yangtze University, Jingzhou 434000, China | | | ZHANG Shu-nan | 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 | | | ZHANG Miao-miao | 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 | | | XIAO Bo-ren | Hunan Jiahe Breeding Intelligence Service Co., Ltd., Changsha 410199, China | xiaoboren2008@126.com | | CHEN Jun-li | 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 | 1154223483@qq.com |
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| Abstract: |
| 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. |
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