Fishery Modernization ›› 2025, Vol. 52 ›› Issue (2): 90-.

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Effects of bioflocs on growth and microbial community structure of Carassius auratus var. Pengze

  

  1. (1 Shanghai Engineering Research Center of Aquaculture,Shanghai Ocean University,Shanghai 201306,China;
    2 Jiangxi Fisheries Research Institute,Nanchang 330039,Jiangxi,China;
    3 Shanghai Collaborative Innovation Center for Cultivating Elite Breeds and Green-culture of
    Aquaculture Animals,Shanghai 201306,China;
    4 Key Laboratory of Freshwater Aquatic Germplasm Resources,
    Ministry of Agriculture and Rural Affairs,Shanghai Ocean University,Shanghai 201306,China)
  • Online:2025-04-20 Published:2025-05-27

生物絮团对彭泽鲫生长及微生物群落结构的影响

  1. （1上海海洋大学上海水产养殖工程技术研究中心，上海201306；
    2江西省水产科学研究所，江西南昌330039；
    3上海市水产动物良种创制与绿色养殖协同创新中心，上海201306；
    4上海海洋大学水产科学国家级实验教学示范中心，上海201306）
  • 通讯作者: 罗国芝( 1974— ),女,教授,研究方向:水产养殖用水重复利用研究。E-mail: gzhluo@ shou. edu. cn.
  • 作者简介: 陈达宏( 1998— ),男,硕士研究生,研究方向:水产养殖水环境调控及养殖用水重复利用。E-mail: 819004671@qq. com.

  • 基金资助:
     国家特色淡水鱼产业技术体系( CARS-46-37 )；江西省重点研发项目( 2021ZPYFB0082 )

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Abstract: This study aimed to evaluate the feasibility of Biofloc technology (BFT) in Carassius auratusvar. Pengze aquaculture and to investigate the effects of total suspended solids (TSS) concentration on the growth of Pengze crucian carp, its intestinal tract, and the microbial community structure in the aquaculture water. The experiment included four TSS concentration groups: BF300, BF500, BF700, and BF900, as well as a water-exchanged control group (CW), and the Pengze crucian carp were cultured for 120 days. The results showed that the total ammonia nitrogen and nitrite nitrogen in the water of the Biofloc treatment groups could be maintained at low levels. The highest weight gain rate, body condition, specific growth rate, and condition factor were observed in the BF500 group, which also had the lowest feed coefficient of 1.42. In addition, there was no significant difference in the content of T-SOD and LSZ among the groups (P > 0.05). Microbiome analysis showed that the richness index of the intestinal microbial community in the Biofloc group decreased with the increase of TSS concentration in Pengze crucian carp; the dominant bacterial phylum in the intestine was Proteobacteria, Bacteroidota, Fusobacteriota, and Actinobacteriota, with Proteobacteria being the main bacterial group. The dominant bacterial phylum in the aquaculture water of the Biofloc group was Proteobacteria, Bacteroidota, Chloroflexi, and Actinobacteriota. In summary, the optimal TSS concentration for Pengze crucian carp was 500 mg/L, and BFT can serve as a new model for the green aquaculture of Pengze crucian carp.


Key words: Biological floc, TSS concentration, Carassius auratus var. Pengze, grow, microorganism.

摘要： 为评估生物絮团技术（Biofloc technology）在彭泽鲫（Carassius auratus var. Pengze）养殖中的可行性，并探讨不同总悬浮固体浓度（Total Suspended Solids，TSS）对彭泽鲫生长及其肠道和养殖水体微生物群落结构的影响。试验设计了BF300、BF500、BF700和BF900共4种TSS质量浓度及换水对照组（CW），试验养殖彭泽鲫120 d。结果显示，生物絮团各处理组的水体中TAN和NO2--N均能维持在较低水平。BF500组的增长率、脏体比、特定生长率和肥满度最高，且该组的饲料系数最低，为1.42。各组彭泽鲫的T-SOD和LSZ含量无显著差异（P > 0.05）。微生物群落分析表明，肠道中优势菌门为变形菌门（Proteobacteria）、拟杆菌门（Bacteroidota）、梭杆菌门（Fusobacteriota）和放线菌门（Actinobacteriota）；肠道中优势菌属为不动杆菌属（Acinetobacter）和鲸杆菌属（Cetobacterium）。综上，彭泽鲫最佳TSS质量浓度为500 mg/L，生物絮团技术可作为彭泽鲫绿色养殖的一种新模式。


关键词: 生物絮团, 总悬浮固体, 彭泽鲫, 生长, 微生物