1. Key Laboratory of Microbial Resources (Ministry of Agriculture, China), Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, PR China
2. State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China
3. Biomass Energy Technology Research Centre, Biogas Institute of Ministry of Agriculture, Chengdu 610041, PR China