Journal
BIORESOURCE TECHNOLOGY
Volume 316, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.123823
Keywords
Material conversion; Microbial community structure; Metabolic function; Network analysis
Funding
- National Key Technologies Research and Development Program of China [2017YFD0800200]
- Major Applied Agricultural Technology Innovation Projects of Shandong Province [SD2019ZZ009]
- Natural Science Foundation of Shandong Province, China [ZR2018MD001]
- Melon and Vegetable Industry Technology Collaborative Innovation Center of Ningxia Hui Autonomous Region [2017DC55]
- Funds of Shandong Province [2018-1-1289]
- Qingdao ZIPNOW Bio-organic Fertilizer RD Project [2018-1-1289]
- Funds of the Shandong Double Tops Program
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In this study, green soybean hulls and maize straw were used for composting to explore the dynamics of material conversion, bacterial and fungal communities and metabolic functions. The results showed that bacterial and fungal communities had different temporal successions during composting. The bacterium Streptosporangiaceae was a biomarker in the thermophilic stage of composting, and the fungus Chaetomiaceae was a biomarker in the thermophilic stage and cooling stage. In the bacterial network, the germination index (GI) had a time-delayed association with Truepera, Pseudomonas and Methylococcaceae, which represented the key physicochemical characteristics that affect the community. In the fungal community, the GI, pH, fulvic acid (FA) and temperature etc. had a joint effect. Carbohydrate metabolism and amino acid metabolism were the main metabolic pathways, and saprotrophs represented the dominant fungal trophic mode in the composting process. These results provide a reference from screening specific and efficient agents to accelerate natural vegetable composting.
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