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纳米氧化锌对堆肥过程中细菌群落演替的影响 被引量:1

Influence of zinc oxide nanoparticles on the succession of bacterial communities during the composting process
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摘要 纳米氧化锌(纳米ZnO)的广泛应用使其进入农业生产领域的可能性增加. 鉴于堆肥是处理农业废弃物的主要方式,采用实验室模拟堆置,以鸡粪、秸秆粉为主要原料进行堆肥实验,研究3种浓度的纳米ZnO(0.1,1,10 mg/kg)对堆肥过程中理化指标的影响,并采用高通量测序技术研究堆体中细菌群落结构及组成的变化. 结果显示,纳米ZnO不会影响堆肥过程中的温度及腐熟程度,但降低了堆肥过程中的pH;对堆体中细菌Alpha多样性影响不显著,但改变了细菌群落结构及组成. 其中,堆肥高温期(5 d)厚壁菌门及拟杆菌门的一些属对纳米ZnO处理响应最明显,0.1 mg/kg浓度纳米ZnO提高了Cohnella的相对丰度,而1、10 mg/kg浓度纳米ZnO增加了魏斯氏菌属、芽孢杆菌属、肠球菌属的相对丰度,降低了一些拟杆菌属的丰度. 本研究表明纳米ZnO不仅影响堆肥理化性质,也影响堆肥中一些功能微生物,结果可为评价纳米ZnO的环境效应提供重要依据. (图4 表3 参29) The wide application of zinc oxide (ZnO) nanoparticles increases the possibility of their release into the agricultural environment. This study aimed to investigate the influence of ZnO nanoparticles on the composting process, because composting is the main means to dispose of agricultural organic waste. A lab-scale experiment was conducted to investigate the effects of different concentrations of ZnO nanoparticles (0.1, 1, and 10 mg/kg) on the physicochemical properties (temperature, pH, and seed germination index), and the bacterial community components and structure, of the compost. The results show that ZnO nanoparticle treatments had a low influence on the temperature and seed germination index, but that they decreased the pH of the compost. For the bacterial community, no significant differences were detected in terms of the alpha diversity, but the bacterial community structure and components were changed by exposure to ZnO nanoparticles. The largest variations in the bacterial community were found at the hyperthermal stage. In particular, the genera affiliated with Firmicutes and Bacteroidetes were changed to a large extent. The 0.1 mg/kg ZnO nanoparticles treatment increased the relative abundance of Cohnella, whereas the 1 mg/kg and 10 mg/kg treatments enhanced the proportions of Weissella, Bacillus, and Enterococcus, and decreased the relative abundance of certain genera belonging to Bacteroidetes. Our investigation indicate that ZnO nanoparticles influenced some functional guilds in microbial communities as well as the physicochemical properties of the compost, which is conducive to the evaluation of environmental responses to ZnO nanoparticle exposure.
作者 徐江兵 王艳玲 罗小三 冯有智 XU Jiangbing1, 2, WANG Yanling1, LUO Xiaosan1 & FENG Youzhi2 (1 International Center for Ecology, Meteorology and Environment, School of Applied Meteorology, Nanjing University of lnformation Science and Technology, Nanjing 210044, China ;2 State Key Laboratory oJ Sod and Sustatnable Agrtculture, Institute of Sod Sczence, Chinese Academy of Sciences, Nanjing 210008, China)
出处 《应用与环境生物学报》 CSCD 北大核心 2017年第6期1166-1171,共6页 Chinese Journal of Applied and Environmental Biology
基金 国家自然科学基金项目(41501264)、江苏省自然科学基金项目(BK20140991)、土壤与农业可持续发展国家重点实验室(Y412201441)和南京信息工程大学人才启动基金资助
关键词 纳米氧化锌 高通量测序 堆肥 细菌群落组成 ZnO nanoparticles high throughput sequencing compost bacterial community composition
作者简介 通讯作者Corresponding author(E-mail:jbxu@nuist.edu.cn)
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