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<p>Driven by growing environmental awareness, water-saving technologies in aquaculture are receiving increasing attention. To develop a novel water-saving shrimp farming technology, we constructed a biofloc system (BF group) using bagasse as the core material, with a conventional water-exchange system serving as the control (CK group). A 42-d farming experiment of shrimp <i>Penaeus vannamei</i> in production scale was conducted to evaluate the water quality control effect of bagasse biofloc and its effects on the growth performance, body composition, immunity and intestinal flora of <i>P. vannamei</i>. Results indicate that the cumulative water exchange of BF group was 36.92% lower than that of CK group, and the water consumption per kg shrimp production was reduced by 24.03%. The concentration of total ammonia nitrogen (TAN) in BF group was significantly lower than that in CK group, whereas the concentrations of NO<Stack> <sub>2</sub> <sup>−</sup> </Stack>-N and NO<Stack> <sub>3</sub> <sup>−</sup> </Stack>-N were significantly higher than those in CK group (<i>P</i>&lt;0.05). Bagasse bioflocs could be eaten by <i>P. vannamei</i>, which accounted for 23.14% of the contribution rate of food. The final body length, yield and survival rate of <i>P. vannamei</i> in CK group were significantly higher than those in BF group (<i>P</i>&lt;0.05). The contents of crude protein and crude fat of <i>P. vannamei</i> in BF group were significantly higher than those in CK group (<i>P</i>&lt;0.05). The total antioxidant capacity (T-AOC) ability and the activities of catalase (CAT) and alkaline phosphatase (AKP) of <i>P. vannamei</i> in BF group were significantly higher than those in CK group, whereas the nitric oxide synthase (T-NOS) activity was significantly lower than that in CK group (<i>P</i>&lt;0.05). The intestinal microbial community composition and function of <i>P. vannamei</i> in CK group and BF group was similar, but the richness and diversity of BF group were higher (<i>P</i>&lt;0.05). In summary, the use of bagasse bioflocs system for <i>P. vannamei</i> industrial farming significantly reduced the amount of water exchanged. Bagasse bioflocs can be ingested by shrimp and affect the body composition and immunity.</p>

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Water quality and growth, immunity, and intestinal flora of shrimp Penaeus vannamei in the industrial farming system with bagasse bioflocs

  • 期刊论文

  • 发表日期：

    2026年4月22日

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  • Chaotong Chen,
  • Tianwen Zhang,
  • Ziwen Ren,
  • Fang Wang,
  • Tao Li,
  • Hongwei Shan,
  • Guangbin Liu

摘要

Driven by growing environmental awareness, water-saving technologies in aquaculture are receiving increasing attention. To develop a novel water-saving shrimp farming technology, we constructed a biofloc system (BF group) using bagasse as the core material, with a conventional water-exchange system serving as the control (CK group). A 42-d farming experiment of shrimp Penaeus vannamei in production scale was conducted to evaluate the water quality control effect of bagasse biofloc and its effects on the growth performance, body composition, immunity and intestinal flora of P. vannamei. Results indicate that the cumulative water exchange of BF group was 36.92% lower than that of CK group, and the water consumption per kg shrimp production was reduced by 24.03%. The concentration of total ammonia nitrogen (TAN) in BF group was significantly lower than that in CK group, whereas the concentrations of NO 2 − -N and NO 3 − -N were significantly higher than those in CK group (P<0.05). Bagasse bioflocs could be eaten by P. vannamei, which accounted for 23.14% of the contribution rate of food. The final body length, yield and survival rate of P. vannamei in CK group were significantly higher than those in BF group (P<0.05). The contents of crude protein and crude fat of P. vannamei in BF group were significantly higher than those in CK group (P<0.05). The total antioxidant capacity (T-AOC) ability and the activities of catalase (CAT) and alkaline phosphatase (AKP) of P. vannamei in BF group were significantly higher than those in CK group, whereas the nitric oxide synthase (T-NOS) activity was significantly lower than that in CK group (P<0.05). The intestinal microbial community composition and function of P. vannamei in CK group and BF group was similar, but the richness and diversity of BF group were higher (P<0.05). In summary, the use of bagasse bioflocs system for P. vannamei industrial farming significantly reduced the amount of water exchanged. Bagasse bioflocs can be ingested by shrimp and affect the body composition and immunity.