Humus formation driven by ammonia-oxidizing bacteria during mixed materials composting
| Autor: | Zechen Zhu, Jia Liming, Junqiu Wu, Zimin Wei, Yue Zhao, Pin Lv |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
inorganic chemicals
0106 biological sciences Environmental Engineering Microorganism chemistry.chemical_element Bioengineering Ammonia-oxidizing bacteria 010501 environmental sciences 01 natural sciences Soil Ammonia 010608 biotechnology Waste Management and Disposal Soil Microbiology 0105 earth and related environmental sciences Bacteria biology Renewable Energy Sustainability and the Environment Chemistry Inoculation Composting General Medicine biology.organism_classification Archaea Nitrification Nitrogen Humus Transformation (genetics) Environmental chemistry Oxidation-Reduction |
| Zdroj: | Bioresource Technology. 311:123500 |
| ISSN: | 0960-8524 |
| DOI: | 10.1016/j.biortech.2020.123500 |
| Popis: | The aim of this study was to identify the effects of ammonia-oxidizing bacteria (AOB) inoculation on humus formation. Both nitrogen conversion and humus formation were considered as the main processes, because NH4+-N-like compounds not only substrates of nitrification, but also precursors of humus. During composting, the inoculation of AOB indeed increased humus concentration by fixing NH3 emission as NH4+-N, but it has also promoted nitrogen transformation. While the main reason was the changed bacteria community structure caused by inoculating AOB. Moreover, the relationship between bacteria and nitrogen transformation and humus formation has become closer. And bacteria were more likely to synthesize humus. Therefore, it is conjectured that AOB inoculation could not only provide NH4+-N for humus formation, but also enhance the anabolism of microorganisms. This suppose has been confirmed by structural equation model in this study. Therefore, AOB inoculation has a driving effect on promoting humus formation. |
| Databáze: | OpenAIRE |
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