1. The College of Ecological Environmental and Resources, Qinghai Nationalities University, Xining, China;
2. Key Laboratory of Biotechnology Analysis and Test in Qinghai-Tibet Plateau, Qinghai Nationalities University, Xining, China;
3. Key Laboratory of Resource Chemistry and Eco-environmental Protection in Tibetan Plateau, Qinghai Nationalities University, State Ethnic Affairs Commission, Xining, China