期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 147, 期 -, 页码 637-642出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2017.09.023
关键词
Antibiotic resistance gene; Composting; Genetically modified cotton stalk; Redundancy analysis
资金
- National Natural Science Foundation [41671474, 41601531]
- 948 Project of Chinese Ministry of Agriculture [2015-Z37]
Genetically modified (GM) cotton production generates a large yield of stalks and their disposal is difficult. In order to study the feasibility of using GM cotton stalks for composting and the changes that occur in antibiotic resistance genes (ARGs) during composting, we supplemented pig manure with GM or non-GM cotton stalks during composting and we compared their effects on the absolute abundances (AA) of (intI1, intI2, and ARGs under the two treatments. The compost was mature after processing based on the germination index and C/N ratio. After composting, the AAs of ARGs, intI1, and intI2 were reduced by 41.7% and 45.0% in the non-GM and GM treatments, respectively. The ARG profiles were affected significantly by temperature and ammonia nitrogen. In addition, excluding tetC, GM cotton stalks had no significant effects on ARGs, intI1, and intI2 compared with the non-GM treatment (p < 0.05). Thus, similar to non-GM cotton stalks, GM cotton stalks can be used for aerobic composting with livestock manure, and the AAs of ARGs can be reduced. Furthermore, the results of this study provide a theoretical basis for the harmless utilization of GM cotton stalks.
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