1. Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, The Ministry of Education, Guangxi Normal University, Guilin, China;
2. College of Environment and Resource, Guangxi Normal University, Guilin, China;
3. Public Monitoring Center for Agro-product, Guangdong Academy of Agricultural Sciences, Guangzhou, China;
4. College of Life Science, Guangxi Normal University, Guilin, China