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当前位置: 首页 > 文章 > Microbial community dynamics during composting of animal manures contaminated with arsenic, copper, and oxytetracycline 农业科学学报 (英文) 2021,20 (6)
Position: Home > Articles > Microbial community dynamics during composting of animal manures contaminated with arsenic, copper, and oxytetracycline Journal of Integrative Agriculture 2021,20 (6)

Microbial community dynamics during composting of animal manures contaminated with arsenic, copper, and oxytetracycline

作  者：
Shehata, Ebrahim;Cheng Deng-miao;Ma Qian-qian;Li Yan-li;Liu Yuan-wang;Feng Yao;Ji Zhen-yu;Li Zhao-jun
单  位：
Dongguan Univ Technol, Res Ctr Ecoenvironm Engn, Dongguan 523808, Peoples R China;Damanhour Univ, Coll Agr, Dept Nat Resources & Agr Engn, Damanhour 22511, Egypt;Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Key Lab Plant Nutr & Fertilizer, Minist Agr & Rural Affairs,China New Zealand Join, Beijing 100081, Peoples R China
关键词：
composting;heavy metal and metalloid;oxytetracycline;microbial community;principle component analysis;redundancy analysis
摘  要：
Effects of the heavy metal copper (Cu), the metalloid arsenic (As), and the antibiotic oxytetracycline (OTC) on bacterial community structure and diversity during cow and pig manure composting were investigated. Eight treatments were applied, four to each manure type, namely cow manure with: (1) no additives (control), (2) addition of heavy metal and metalloid, (3) addition of OTC and (4) addition of OTC with heavy metal and metalloid; and pig manure with: (5) no additives (control), (6) addition of heavy metal and metalloid, (7) addition of OTC and (8) addition of OTC with heavy metal and metalloid. After 35 days of composting, according to the alpha diversity indices, the combination treatment (OTC with heavy metal and metalloid) in pig manure was less harmful to microbial diversity than the control or heavy metal and metalloid treatments. In cow manure, the treatment with heavy metal and metalloid was the most harmful to the microbial community, followed by the combination and OTC treatments. The OTC and combination treatments had negative effects on the relative abundance of microbes in cow manure composts. The dominant phyla in both manure composts included Actinobacteria, Bacteroidetes, Firmicutes, and Proteobacteria. The microbial diversity relative abundance transformation was dependent on the composting time. Redundancy analysis (RDA) revealed that environmental parameters had the most influence on the bacterial communities. In conclusion, the composting process is the most sustainable technology for reducing heavy metal and metalloid impacts and antibiotic contamination in cow and pig manure. The physicochemical property variations in the manures had a significant effect on the microbial community during the composting process. This study provides an improved understanding of bacterial community composition and its changes during the composting process.

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