Impact of Biochar Addition on Biofloc Nitrifying Bacteria and Inorganic Nitrogen Dynamics in an Intensive Aquaculture System of Shrimp

文献类型： 外文期刊

第一作者： Xu, Wujie

作者： Xu, Wujie;Su, Haochang;Xu, Yu;Hu, Xiaojuan;Wen, Guoliang;Cao, Yucheng;Xu, Wujie;Su, Haochang;Xu, Yu;Hu, Xiaojuan;Wen, Guoliang;Cao, Yucheng;Zhang, Demin

作者机构：

关键词： shrimp; biochar; biofloc; bacterial community; nitrifying bacteria; nitrifying gene; nitrogen transformation; nitrogen dynamic

期刊名称：MICROORGANISMS （ 影响因子：4.2； 五年影响因子：4.6 ）

ISSN：

年卷期： 2024 年 12 卷 12 期

页码：

收录情况： SCI

摘要： In this study, an eight-week culture trial of Penaeus vannamei juveniles was conducted in commercial intensive systems to compare the impacts of biochar and molasses addition on biofloc nitrifying bacteria and inorganic nitrogen dynamics under limited water exchange conditions. During the trial, the biofloc concentration (in terms of VSS and TSS), quantities of total bacteria (TB) and total Vibrio (TV), and ratio of TV/TB in the culture water were lower in the biochar group compared to the molasses group. Metagenomic sequencing analysis revealed that the bacterial community composition of bioflocs showed higher alpha-diversity and complexity in the biochar group compared to the molasses group. Moreover, the abundance of nitrifying bacterial genera and functional genes in bioflocs was higher in the biochar group compared to the molasses group. Inorganic nitrogen dynamics showed that NH4+-N and NO2--N were better controlled in the biochar group compared to the molasses group, as reflected by lower peaks of NH4+-N and NO2--N and higher NO3--N concentrations. Excellent production performance of shrimp was achieved, which in turn proved the reliable effect of biochar addition on the mediation of inorganic nitrogen transformation through nitrifying bacteria. These results showed that biochar addition could promote biofloc nitrifying bacteria and nitrification to more effectively control harmful nitrogen for shrimp efficient production. This study provides a practical example for the biochar application in biofloc-based systems for intensive aquaculture.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序