牛粪生物炭添加羊粪堆肥中重金属抗性细菌群落演替的分布。
Distribution of heavy metal resistant bacterial community succession in cow manure biochar amended sheep manure compost.
机构信息
College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China.
College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China; Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden.
出版信息
Bioresour Technol. 2021 Sep;335:125282. doi: 10.1016/j.biortech.2021.125282. Epub 2021 May 12.
The aim of this investigation was to study the effects of cow manure biochar (CMB) on the distribution of heavy metal resistant bacterial (HMRB) community succession during sheep manure (SM) composting. The experiments were conducted with six different ratio of CMB (0%(T1), 2.5%(T2), 5%(T3),7.5%(T4),10%(T5) and 12%(T6)onadryweightbasis) and 0% is used as control. The results showed that the most dominant phylum were Proteobacteria (40.89%-5.65%) and Firmicutes (0.16%-93.18%), and 7.5% CMB mixed with sheep manure for best results. Thus, significant correlation was noticed among the analyzed physicochemical factors, gaseous emission and bacterial phylum in used 7.5-10% CMB applied for SM composting. Overall, the application of biochar increased the diversity of the bacterial community and promoted the degradation of organic matter. In addition, 7.5-10% CMB applied treatments showed greater immobilization of HMRB community succession during SM composting.
本研究旨在探讨牛粪生物炭（CMB）对绵羊粪（SM）堆肥过程中重金属抗性细菌（HMRB）群落演替分布的影响。实验采用了 6 种不同比例的 CMB（0%（T1）、2.5%（T2）、5%（T3）、7.5%（T4）、10%（T5）和 12%（T6），以干重为基础）和 0%作为对照。结果表明，最主要的菌门为变形菌门（40.89%-5.65%）和厚壁菌门（0.16%-93.18%），7.5%CMB 与绵羊粪混合效果最佳。因此，在使用 7.5-10%CMB 进行 SM 堆肥时，分析的理化因子、气体排放和细菌门之间存在显著相关性。总的来说，生物炭的应用增加了细菌群落的多样性，并促进了有机物的降解。此外，7.5-10%CMB 处理表现出对 SM 堆肥过程中 HMRB 群落演替的更大固定化作用。
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