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| Regulation of water quality using submerged plants in a Macrobrachium rosenbergii aquaculture system |
| Received:August 19, 2022 |
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| KeyWord:submerged plant|Macrobrachium rosenbergii|water environment|in-situ purification |
| Author Name | Affiliation | E-mail | | MIAO Yanyang | Jiangsu Key Laboratory for Aquatic Crustacean Diseases, College of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China
Key Laboratory of Genetic Breeding and Cultivation for Freshwater Crustacean, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Institute of Jiangsu Province, Nanjing 210017, China | | | GAO Zhibao | Key Laboratory of Genetic Breeding and Cultivation for Freshwater Crustacean, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Institute of Jiangsu Province, Nanjing 210017, China
College of Marine Science and Fisheries, Jiangsu Ocean University, Lianyungang 222005, China | | | LI Xuguang | Key Laboratory of Genetic Breeding and Cultivation for Freshwater Crustacean, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Institute of Jiangsu Province, Nanjing 210017, China | xuguangli1981@163.com | | ZHOU Jun | Key Laboratory of Genetic Breeding and Cultivation for Freshwater Crustacean, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Institute of Jiangsu Province, Nanjing 210017, China | | | XU Zhiqiang | Key Laboratory of Genetic Breeding and Cultivation for Freshwater Crustacean, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Institute of Jiangsu Province, Nanjing 210017, China | | | XU Yu | Key Laboratory of Genetic Breeding and Cultivation for Freshwater Crustacean, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Institute of Jiangsu Province, Nanjing 210017, China | | | LIN Hai | Key Laboratory of Genetic Breeding and Cultivation for Freshwater Crustacean, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Institute of Jiangsu Province, Nanjing 210017, China | |
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| Abstract: |
| To explore the effect of submerged plants on water quality regulation in a Macrobrachium rosenbergii aquaculture system, compare the water quality, phytoplankton, zooplankton, and microbial community structure between the ecological culture group based on in-situ purification through submerged plants and the traditional culture group. The relationship between dominant populations of phytoplankton, zooplankton, microorganisms, and environmental factors affecting water quality was also discussed.The results showed that there were significant differences in water quality and plankton community structure under the two groups. The concentrations of total phosphorus（TP）, total nitrogen（TN）, chemical oxygen demand（COD）, and chlorophyll-a（Chl-a）in the ecological culture group were lower than those in the traditional culture group. The biomass of phytoplankton and zooplankton in the traditional culture group was higher than that in the ecological culture group. The diversity indices of phytoplankton and zooplankton were significantly different between the two groups. Microorganism mainly included Actinobacteria, Bacteroidea, Cyanobacteria, and Proteobacteria. In the ecological culture group, the biomass of Actinobacteria was the highest. The dominant bacteria in the traditional culture group mainly included Microcystis and Anabaena in Cyanobacteria, and Flavobacterium in Bacteroideae. Redundancy analysis showed that TP, COD, and dissolved oxygen （DO）were the key environmental factors influencing the composition and distribution of the plankton community. In-situ purification of the water environment for Macrobrachium rosenbergii by submerged plants could significantly decrease nitrogen and phosphorus nutrients in aquaculture, reduce the biomass of phytoplankton and zooplankton, increase the stability of microbial community structure in the water, and improve the over-all aquaculture water environment. |
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