Increased enzyme activities and fungal degraders by Gloeophyllum trabeum inoculation improve lignocellulose degradation efficiency during manure-straw composting. (October 2021)

• Record Type: Journal Article
• Authors: Zhu, Ning; Zhu, Yanyun; Li, Bingqing; Jin, Hongmei; Dong, Yiwei
• Is Part Of: Bioresource technology. Volume 337(2021)
• Publication Date: 2021-10
• Subjects: Composting -- Inoculation -- Lignocellulose degradation -- Enzyme activity -- Fungal community; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2021.125427
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: G. trabeum inoculation increased maturity degree of composting. G. trabeum inoculation promoted lignocellulose degradation. Degradative enzymes activities were increased by G. trabeum inoculation. Degradative enzyme-producing fungi became dominant after G. trabeum inoculation. Abstract: The present study investigated the effect of brown-rot fungus Gloeophyllum trabeum inoculation on lignocellulose degradation, enzyme activities and fungal community during co-composting of swine manure and wheat straw. G. trabeum inoculation shortened the maturation period of composting from 39 to 30 days. Composting piles inoculated with G. trabeum showed a higher degree of maturity as indicated by 31.6% lower C/N ratio and 29.4% higher GI. The decomposition rate of cellulose, hemicellulose and lignin was increased by 181.1%, 49.4% and 109.4%, respectively, due to higher activities of filter paper enzyme, xylanase, manganese peroxidase and laccase. Redundancy analysis showed that inoculating G. trabeum influenced the succession of fungal communities by changing the main physicochemical parameters, resulting in the increased relative abundance of Aspergillus, Mycothermus and Melanocarpus . Pearson correlation analysis indicated that more dominant fungal genera were involved in the production of lignocellulose-degrading enzymes after G. trabeum inoculation.