Scholarlink

<p>Aquaponics integrates aquaculture and hydroponics to achieve nutrient recycling and environmental sustainability. However, optimizing microbial interactions and substrate characteristics remains critical for maximizing system efficiency. This study assessed the influence of four substrates, including coir pith, coconut shell charcoal, biochar and medical stone, on system performance and microbial community dynamics within a decoupled aquaponic setup cultivating crucian carp (<i>Carassius auratus</i>) and cherry tomatoes (<i>Lycopersicon esculentum</i>). Comprehensive analyses were conducted on physicochemical parameters, plant and fish growth, microbial community structure, and substrate chemical alterations. Results demonstrated that biochar beds supported more stable pH, lower soluble organic buildup and stronger nitrification signatures with consistent enrichment of ammonia oxidizing archaea (Thaumarchaeota, 29%) and <i>Nitrospira</i> relative to coir beds. Coir pith has high COD and fosters microbial proliferation that depletes effluent nutrients and impairs plant growth, while its cellulose richness supports notable abundances of Hydrogenedentes, Proteobacteria, and Fibrobacteres. The total nitrogen content in medical stone is significantly advantageous, as it has a high relative abundance of nitrospirae. Redundancy analysis revealed significant correlations between microbial community composition and environmental parameters, notably EC and pH (<i>p</i> = <i>0.02</i> at genus level, <i>p</i> = <i>0.04</i> at phylum level). Fourier-transform infrared spectroscopy indicated a reduction of cellulose-related functional groups in coir pith over time, and coir-based treatments were associated with higher relative abundances of Nanoarchaeota and Omnitrophicaeota compared with biochar-based substrates. Comprehensive analysis concludes that 6-mm biochar demonstrated increased aromaticity, structural stability, and resistance to microbial decomposition, resulting in optimal microbial diversity, with cherry tomatoes showing the most significant increase in fresh weight.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Microbial dynamics and system performance in novel decoupled aquaponics with different cultivation substrates

  • 期刊论文

  • 发表日期：

    2025年12月1日

查看全文
  • Tianpei Li,
  • Xiaochan Wang,
  • Oorbessy Gaju,
  • Yinyan Shi,
  • Yuru Chang,
  • Paul B. Brown,
  • Ze Zhu

摘要

Aquaponics integrates aquaculture and hydroponics to achieve nutrient recycling and environmental sustainability. However, optimizing microbial interactions and substrate characteristics remains critical for maximizing system efficiency. This study assessed the influence of four substrates, including coir pith, coconut shell charcoal, biochar and medical stone, on system performance and microbial community dynamics within a decoupled aquaponic setup cultivating crucian carp (Carassius auratus) and cherry tomatoes (Lycopersicon esculentum). Comprehensive analyses were conducted on physicochemical parameters, plant and fish growth, microbial community structure, and substrate chemical alterations. Results demonstrated that biochar beds supported more stable pH, lower soluble organic buildup and stronger nitrification signatures with consistent enrichment of ammonia oxidizing archaea (Thaumarchaeota, 29%) and Nitrospira relative to coir beds. Coir pith has high COD and fosters microbial proliferation that depletes effluent nutrients and impairs plant growth, while its cellulose richness supports notable abundances of Hydrogenedentes, Proteobacteria, and Fibrobacteres. The total nitrogen content in medical stone is significantly advantageous, as it has a high relative abundance of nitrospirae. Redundancy analysis revealed significant correlations between microbial community composition and environmental parameters, notably EC and pH (p = 0.02 at genus level, p = 0.04 at phylum level). Fourier-transform infrared spectroscopy indicated a reduction of cellulose-related functional groups in coir pith over time, and coir-based treatments were associated with higher relative abundances of Nanoarchaeota and Omnitrophicaeota compared with biochar-based substrates. Comprehensive analysis concludes that 6-mm biochar demonstrated increased aromaticity, structural stability, and resistance to microbial decomposition, resulting in optimal microbial diversity, with cherry tomatoes showing the most significant increase in fresh weight.