Journal
BIORESOURCE TECHNOLOGY
Volume 286, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.121375
Keywords
Metabolic capacity; Network analysis; Enzyme activity; Seaweed fertilizer; High-throughput sequencing
Funding
- National Natural Science Foundation of China [41661068, 31660205]
- Jiangxi Province Science and Technology Support Program [20171BBF60057]
- China Postdoctoral Science Foundation [2017M611944]
- Postdoctoral Research Selected Foundation of Jiangxi [2017KY05]
- Foundation of State Key Laboratory of Soil and Sustainable Agriculture [Y20160010]
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The objective of this study was to investigate microbial responses when seaweed fertilizer was added to maize straw compost. The metabolic characteristics and bacterial communities were assessed using 16S rRNA sequencing and Biolog analysis. Results showed that the urease, dehydrogenase, and metabolic activities improved on day 21 after the addition of seaweed fertilizer. Firmicutes, Proteobacteria, and Actinobacteria were the dominant phyla in the compost. The relative abundances of Proteobacteria and Actinobacteria were increased by addition of seaweed fertilizer during the early composting stage. Temperature, NH4+-N, NO3- -N concentrations, and carbon source metabolism had close relationships with bacterial community variation during composting. A network analysis revealed that NO3--N content had a positive association with Aeromicrobium, and seaweed fertilizer application improved the growth of keystone species related to N cycling. These results suggested that seaweed fertilizer influenced bacterial community succession through its effects on N concentrations during the composting process.
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