微生物驱动生物炭和豆渣在堆肥过程中对 NH 和 NO 排放的作用机制。
Microbial driving mechanism of biochar and bean dregs on NH and NO emissions during composting.
机构信息
College 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.
College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China.
出版信息
Bioresour Technol. 2020 Nov;315:123829. doi: 10.1016/j.biortech.2020.123829. Epub 2020 Jul 13.
In this study, the effect of biochar (BC) and bean dregs (BD) on nitrifiers and denitrifiers as well as the contributions to the NH and NO emissions were investigated. Compared with the BD treatment, the maximum value of NH and NO emission was decreased by 32.92% and 46.61% in the BD + BC treatment, respectively. The production of NH and NO was closely associated with the abundance and structure of nitrogen functional genes. BD + BC increased the abundance of AOB amoA gene to decrease the NH emission. The abundance of nirS was more closely associated with NO. The abundance of nirS in the BD + BC was lowered by 18.93% compared with the BD treatment, thereby decreasing the NO emission after composting. Besides, the nosZ-type gene was the more functional denitrification bacterial communities to effect the NO emissions.
在这项研究中，考察了生物炭（BC）和豆渣（BD）对硝化菌和反硝化菌的影响，以及它们对 NH 和 NO 排放的贡献。与 BD 处理相比，BD+BC 处理分别减少了 32.92%和 46.61%的最大 NH 和 NO 排放。NH 和 NO 的产生与氮功能基因的丰度和结构密切相关。BD+BC 增加了 AOB amoA 基因的丰度，从而减少了 NH 的排放。nirS 的丰度与 NO 更密切相关。与 BD 处理相比，BD+BC 中 nirS 的丰度降低了 18.93%，从而降低了堆肥后的 NO 排放。此外，nosZ 型基因是更具功能的反硝化细菌群落，对 NO 排放有影响。
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