39 / 2021-06-29 10:22:09

Response of Bacterial community successions to the humification process of different material composting

Composting; humification process; community successions; microbial taxa; bacterial communities

Composting is one of the effective approaches to dispose of organic solid waste. And the humification process has been a focus within the field of composting. Microbes as drivers of the humification process are also often used to reveal changes of compost humus. Nevertheless, the temporal dynamics of microbial communities, microbial taxa, and the habitat niche breadths in response to humification processes has been scarcely reported. In this study, a laboratory-scale composting experiment was conducted with chicken manure（CM）, garden waste(GW) and rice straw(RS). The research aimed to investigate the relationship between microbial community succession status and the compost humification process. The results found that the humification index increased. In addition, all taxa beta diversity analysis revealed that the main influencing factor was the different initial sources rather than the different period. Significant correlation was also found between the humification index with bacterial community diversity and habitat breadth. In addition, we verified that different abundance taxa patterns play critical roles in response to the humification process. Our results demonstrate that the influence of microhabitat factors on the response of bacterial community dynamics to different sources of humification process.