National Hulunber Grassland Ecosystem Observation and Research Station, Insti-tute of Agricultural Resources and Regional Planning, Chinese Academy of Agri-cultural Sciences, Beijing 100081, China
Prof. Kebiao Mao
National Hulunber Grassland Ecosystem Observation and Research Station, Insti-tute of Agricultural Resources and Regional Planning, Chinese Academy of Agri-cultural Sciences, Beijing 100081, China