(1 Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China; 2 Guangxi Forestry Research Institute, Nanning 530002, China; 3 Guangxi Nanning Eucalypt Plantation Ecosystem Observation and Research Station, Nanning 530002, China; 4 Guangxi Stateowned Qipo Forest Farm, Nanning 530225, China).