Effects of soybean oligosaccharides on water quality and microbial community in biofloc systems

IF 3.7 2区农林科学 Q1 FISHERIES Aquaculture Reports Pub Date : 2025-04-12 DOI:10.1016/j.aqrep.2025.102798

Huiying Ma , Mengping Tian , Rongfei Zhang , Jianhua Zhao , Qiyou Xu , Ming Duan

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Abstract

The aim of this study was to investigate the effect of soybean oligosaccharides (SBOS) on water quality and microbial communities in biofloc systems. A mixture of starch and glucose (3:7) as a carbon source was used as the control group (Con), and the mixture was replaced with SBOS by 2.5 % (DD1), 5 % (DD2), 7.5 % (DD3), and 10 % (DD4) with C: N of 15 as the experimental group with a duration of 30 days. Results indicated that, compared with control group, the accumulation of nitrite nitrogen (NO_-2-N) was reduced in DD2, DD3, and DD4 by the 7th day (P < 0.05)；the biofloc volume (FV) peaked in DD4 on the 14th day (P < 0.05), and there was a significant reduction in nitrate nitrogen (NO_-3-N) accumulation in DD2 by the 28th day (P < 0.05). In addition, compared with control group, the abundance of Sphingobacterium, Deinococcus was significantly decreased and Bdellovibrio, Niveispirillum was significantly increased in DD2 (P < 0.05), the metabolic pathways related to transport, signal transduction and nucleotide metabolism was decreased, while metabolism of terpenoids and polyketides, lipid metabolism, and xenobiotics biodegradation and metabolism were increased in DD2 (P < 0.05). In summary, 5 % SBOS as a carbon source in biofloc systems improved water quality, promoted the population of beneficial bacteria, and reduced the population of harmful bacteria. This study provides both theoretical and practical support for the application of SBOS in biofloc systems, promoting sustainable aquaculture growth and the well-being of aquatic environments.

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大豆低聚糖对水体水质和微生物群落的影响

本研究旨在探讨大豆寡糖（SBOS）对水体水质和微生物群落的影响。以淀粉和葡萄糖（3:7）的混合物为碳源作为对照组（Con），分别以2.5 % （DD1）、5 % （DD2）、7.5 % （DD3）、10 % （DD4）替代淀粉和葡萄糖（3:7）的混合物，以C: N = 15为试验组，试验期30 d。结果表明，与对照组相比，DD2、DD3和DD4第7天亚硝酸盐氮（NO-2-N）积累量减少（P <； 0.05），生物絮团体积（FV）在DD4第14天达到峰值（P <； 0.05），DD2第28天硝酸盐氮（NO-3-N）积累量显著减少（P <； 0.05）。此外，与对照组相比，DD2中Sphingobacterium、Deinococcus丰度显著降低，Bdellovibrio、Niveispirillum丰度显著增加（P <； 0.05），与转运、信号转导和核苷酸代谢相关的代谢途径减少，而萜类和多酮类代谢、脂质代谢和外源生物降解代谢增加（P <； 0.05）。综上所述，5 % SBOS作为生物絮凝体系统中的碳源，改善了水质，促进了有益菌的数量，减少了有害菌的数量。本研究为SBOS在生物絮团系统中的应用，促进水产养殖的可持续发展和水环境的健康提供了理论和实践支持。

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来源期刊

Aquaculture Reports Agricultural and Biological Sciences-Animal Science and Zoology

CiteScore

5.90

自引率

8.10%

发文量

469

审稿时长

77 days

期刊介绍： Aquaculture Reports will publish original research papers and reviews documenting outstanding science with a regional context and focus, answering the need for high quality information on novel species, systems and regions in emerging areas of aquaculture research and development, such as integrated multi-trophic aquaculture, urban aquaculture, ornamental, unfed aquaculture, offshore aquaculture and others. Papers having industry research as priority and encompassing product development research or current industry practice are encouraged.