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<p>Chicken manure composting faces challenges of slow maturation and nutrient losses. This study evaluated vermiwash bioaugmentation applied at 1.5% v/w to the composting substrate; the vermiwash was derived from <i>Eudrilus eugeniae</i> cultivated on an 8:2 cow-to-chicken manure substrate (20% chicken manure in the earthworm cultivation medium) selected for optimal vermiwash production. Vermiwash treatment achieved substantial improvements in nutrient content (nitrogen: 4.66% vs. 1.86%; phosphorus: 0.737% vs. 0.281%; free amino acids: 4.04 vs. 1.12&#xa0;mg/g), microbial activity (density: 9.0 × 10⁹ vs. 1.3 × 10⁹ CFU/g), and maturity indicators (germination index: 100% vs. 58%; carbon mineralization: 25.5% greater). Comprehensive 16&#xa0;S rRNA sequencing revealed distinct microbial succession from thermophilic <i>Firmicutes</i> (25–70%) to oligotrophic <i>Bacteroidota</i> and <i>Proteobacteria</i> (40% combined) at maturation, with enrichment of specialized degraders including <i>Nocardiopsis</i> (20% vs. 7%). Functional analysis (PICRUSt2) identified 73 differentially abundant pathways regulating membrane transport (17.8%), cellular signaling (11.0%), and core metabolism (26.0%). Vermiwash bioaugmentation provides a sustainable solution for converting agricultural waste into premium organic fertilizer with accelerated maturation (31 vs. 42 days) and superior nutrient retention, supporting reduced chemical fertilizer dependency in agriculture.</p>

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Vermiwash as microbial inoculant improved compost quality and functional microbial succession in chicken manure composting

  • 期刊论文

  • 发表日期：

    2026年4月10日

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  • Phuc Hoang Bui,
  • Thanh Truc Tran,
  • Minh-Thien Nguyen,
  • My-Dung Hoang,
  • Thuy-Tien Thi Le,
  • Oanh Ngoc Huynh

摘要

Chicken manure composting faces challenges of slow maturation and nutrient losses. This study evaluated vermiwash bioaugmentation applied at 1.5% v/w to the composting substrate; the vermiwash was derived from Eudrilus eugeniae cultivated on an 8:2 cow-to-chicken manure substrate (20% chicken manure in the earthworm cultivation medium) selected for optimal vermiwash production. Vermiwash treatment achieved substantial improvements in nutrient content (nitrogen: 4.66% vs. 1.86%; phosphorus: 0.737% vs. 0.281%; free amino acids: 4.04 vs. 1.12 mg/g), microbial activity (density: 9.0 × 10⁹ vs. 1.3 × 10⁹ CFU/g), and maturity indicators (germination index: 100% vs. 58%; carbon mineralization: 25.5% greater). Comprehensive 16 S rRNA sequencing revealed distinct microbial succession from thermophilic Firmicutes (25–70%) to oligotrophic Bacteroidota and Proteobacteria (40% combined) at maturation, with enrichment of specialized degraders including Nocardiopsis (20% vs. 7%). Functional analysis (PICRUSt2) identified 73 differentially abundant pathways regulating membrane transport (17.8%), cellular signaling (11.0%), and core metabolism (26.0%). Vermiwash bioaugmentation provides a sustainable solution for converting agricultural waste into premium organic fertilizer with accelerated maturation (31 vs. 42 days) and superior nutrient retention, supporting reduced chemical fertilizer dependency in agriculture.