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Updated: Dec 14, 2025

Physical, Chemical and Biological Characterization of Six Biochars Produced for the Remediation of Contaminated Sites
Published on: November 28, 2014
Microbial driving mechanism of biochar and bean dregs on NH3 and N2O emissions during composting
Yajun Yang1, Mukesh Kumar Awasthi2, Lulu Wu1
1College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, PR China.
Abstract:
In this study, the effect of biochar (BC) and bean dregs (BD) on nitrifiers and denitrifiers as well as the contributions to the NH3 and N2O emissions were investigated. Compared with the BD treatment, the maximum value of NH3 and N2O emission was decreased by 32.92% and 46.61% in the BD + BC treatment, respectively. The production of NH3 and N2O was closely associated with the abundance and structure of nitrogen functional genes. BD + BC increased the abundance of AOB amoA gene to decrease the NH3 emission. The abundance of nirS was more closely associated with N2O. The abundance of nirS in the BD + BC was lowered by 18.93% compared with the BD treatment, thereby decreasing the N2O emission after composting. Besides, the nosZ-type gene was the more functional denitrification bacterial communities to effect the N2O emissions.
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