Community succession of microbial populations related to CNPS biological transformations regulates product maturity during cow-manure-driven composting

• Published in: Bioresource technology 2023-02, Vol.369, p.128493-128493, Article 128493
• Main Authors: Liu, Xin, Rong, Xiangmin, Yang, Junyan, Li, Han, Hu, Wang, Yang, Yong, Jiang, Guoliang, Xiao, Rusheng, Deng, Xingxiang, Xie, Guixian, Luo, Gongwen, Zhang, Jiachao
• Format: Article
• Language: English
• Subjects: Animals; C mineralization; Carbon; Cattle; Compost maturity; Composting; Female; Functional gene; Manure; Nitrogen - metabolism; Nutrient transformation; Soil; Sulfur
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2022.128493

[Display omitted] •Material composition and composting phase affected functional microbiome succession.•Compost N and P availability regulated the succession of functional microbial community.•Change in CNPS transformation populations was notably related to compost maturity.•Organic-P mineralization populations were the key groups regulating compost maturity.•Microbially-driven P dynamics was expected to predict compost efficiency and quality. The main objective of present study was to understand the community succession of microbial populations related to carbon–nitrogen-phosphorus-sulfur (CNPS) biogeochemical cycles during cow-manure-driven composting and their correlation with product maturity. The abundance of microbial populations associated with C degradation, nitrification, cellular-P transport, inorganic-P dissolution, and organic-P mineralization decreased gradually with composting but increased at the maturation phase. The abundance of populations related to N-fixation, nitrate-reduction, and ammonification increased during the mesophilic stage and decreased during the thermophilic and maturation stages. The abundance of populations related to C fixation and denitrification increased with composting; however, the latter tended to decrease at the maturation stage. Populations related to organic-P mineralization were the key manipulators regulating compost maturity, followed by those related to denitrification and nitrification; those populations were mediated by inorganic N and available P content. This study highlighted the consequence of microbe-driven P mineralization in improving composting efficiency and product quality.