Nutrient dynamics and balance of zero–water exchange ponds of grass carp, crucian carp and bighead carp

Zhang, Kai; Wang, Guangjun; Fu, Dongsheng; Gong, Wangbao; Yu, Ermeng; Li, Zhifei; Tian, Jingjing; Xia, Yun; Li, Hongyan; Xie, Jun

doi:10.1016/j.aquaculture.2022.738565

Cited by 10 publications

(4 citation statements)

References 34 publications

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“…Similarly, the NO 2 − -N concentration was maintained lower than 0.5 mg L −1 in the PHB-equipped tilapia zero water-discharge culture system 28 . The NO 2 − -N was more than 6 mg L −1 in zero-water exchange polyculture of several carp species 29 , which is also comparative with the control group of the present study. It is noted that during days 18-20, a sharp decline in NO 2 -N was observed in the experimental and control groups during the experimental period likely because the aquaculture system was equipped with continuous oxygenation and aeration throughout the experimental period (Fig.…”

supporting

confidence: 71%

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Microorganism-mediated denitrogenation of aquaculture systems provoked by poly-β-hydroxybutyrate (PHB)

Xia,

Liu,

Zhang

et al. 2024

npj Clean Water

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The biodegradable polymer poly-β-hydroxybutyrate (PHB) is a promising carbon source for biological mitigation of nitrogen pollution, a significant problem in aquaculture that physical and chemical methods have not provided a comprehensive solution. Here we investigated the impact of PHB on the zero-water-change largemouth bass culture by 30- and 40-day experiments. PHB loaded into the filter circulation pump at 4 g L−1, optimum value determined by the first experiment, significantly reduced the levels of nitrate by 99.65%, nitrite by 95.96%, and total nitrogen by 85.22% compared to the control without PHB. PHB also significantly increased denitrifying bacteria (e.g., Proteobacteria and Fusobacteria) and expression of denitrification genes (e.g., nirK and nirS) in the microbial community, improving growth and health parameters of largemouth bass. While the impact may vary in other culture systems, PHB thus demonstrated its remarkable utility in aquaculture, highlighting ecological assessment and application to larger aquaculture operations as future considerations.

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supporting

confidence: 71%

“…These results indicate that the PHB addition has enriched the microorganisms in the aquaculture system. The carbon released from PHB would have promoted bacterial cell growth 29 resulting in the increased microbial diversity.…”

Section: Microbial Community Diversity and Composition In Culture Systemmentioning

confidence: 99%

Microorganism-mediated denitrogenation of aquaculture systems provoked by poly-β-hydroxybutyrate (PHB)

Xia,

Liu,

Zhang

et al. 2024

npj Clean Water

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“…Though the intensive pond aquaculture mode produced a large amount of aquaculture food and supplied animal protein effectively, there were still serious environmental concerns. Due to the low utilization of feed by cultured animals, the residuals are distributed into ponds, deteriorating the condition of the water and sediment in ponds [4]. In order to discard the pollution, water exchanging is usually performed after harvesting and leads to the deterioration the of surrounding environment [5].…”

Section: Introductionmentioning

confidence: 99%

Evaluating the Effects and Mechanisms of the Eco–Substrate in Aquaculture Environment Restoration from an Ecosystem Perspective via the Ecopath Model

Zhang,

Jiang,

et al. 2024

Sustainability

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Aquaculture supplies high-quality and healthy proteins. With the increasing human demand for aquaculture production, intensive pond aquaculture developed rapidly and results in environmental deterioration. To solve this problem, the eco-substrate (ES), which is the biofilm carrier, has been utilized in aquaculture ponds. Studying the ecological mechanisms of ES from the perspective of the ecosystem may be conducive to the sustainable development of aquaculture. In this study, it was evaluated how ES makes a difference to the trophic structure, energy flow, and system characteristics of two different aquaculture pond ecosystems via the ecopath model. Three aquaculture ponds with ES were designed as the treatment ecosystem and three aquaculture ponds without ES were designed as the control ecosystem. There were 13 and 14 functional groups in the control and treatment ecosystems, respectively. The results showed that (1) the macrozooplankton and microzooplankton showed strong effects on the ecosystem in the keystoneness index; (2) energy transfer pathways in the treatment system with ES increased by 26.23% compared to the control system; (3) the ES improved the utilization rate of detritus, which was 14.91% higher than that of the control ecosystem; (4) the material and energy flow index and network information characteristics demonstrated the ES enhanced the complexity and stability of the treatment system. To improve the energy utilization efficiency, filter feeders can be introduced to ES ponds. Overall, the ES can alter the trophic structure, improve the energy utilization efficiency, and enhance the stability and maturity of aquaculture ecosystems, representing a sustainable practice. Considering the total area of aquaculture ponds on the earth reaching more than 5 million hectares, the application prospect of ES is broad.

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“…Studies have been carried out in situ water environment regulation of ponds [24] and cyanobacteria control in ponds through aquaculture management [25]. A previous study suggested that higher phytoplankton diversity lowers the probability of cyanobacterial blooms [26].…”

Section: Introductionmentioning

confidence: 99%

Effects of Pond Water Depth and Method of Aeration on Phytoplankton Communities in Macrobrachium rosenbergii Farming Ponds

Sheng

Tang

Xia³

et al. 2023

Aquaculture Research

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Recently, profitable Macrobrachium rosenbergii farming has developed rapidly in Asia. The occurrence of cyanobacterial blooms is one of the major environmental problems usually encountered in freshwater prawn farms. This study investigated the effects of pond water depth and aeration mode on phytoplankton communities in selected M. rosenbergii farming ponds in China. We adjusted pond water depth and aeration mode (pond water depth: 1.2 m or 1.8 m; method of aeration: surface or both surface and bottom) to compare and analyze phytoplankton community structure and characteristics between ecological (pond water depth: 1.8 m, both surface and bottom aeration) and traditional (pond water depth: 1.2 m, surface aeration) farming ponds. Water quality parameters were compared in six aquaculture systems, which were measured in situ or lab. The results showed that ecological culture suppressed Cyanophyta abundance and significantly increased the numbers of phytoplankton species leading to a 30.43–136.84% increase in the number of species for ecological ponds compared with that in traditional ponds. In all seasons, ecological culture tended to have decreased total nitrogen and ammonia nitrogen, and significantly lower total phosphorus and reactive phosphate compared with traditional ponds. In conclusion, ponds should maintain deeper water depth (1.8 m) and higher N/P ratio (>3) to promote phytoplankton diversity and suppress blooms; applying optimized culture may resolve planktonic algae problems in aquaculture ponds in Asia.

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Nutrient dynamics and balance of zero–water exchange ponds of grass carp, crucian carp and bighead carp

Cited by 10 publications

References 34 publications

Microorganism-mediated denitrogenation of aquaculture systems provoked by poly-β-hydroxybutyrate (PHB)

Microorganism-mediated denitrogenation of aquaculture systems provoked by poly-β-hydroxybutyrate (PHB)

Evaluating the Effects and Mechanisms of the Eco–Substrate in Aquaculture Environment Restoration from an Ecosystem Perspective via the Ecopath Model

Effects of Pond Water Depth and Method of Aeration on Phytoplankton Communities in Macrobrachium rosenbergii Farming Ponds

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