Nutrient resorption patterns of evergreen and deciduous tree species at different altitudes on Mao‘er Mountain, Guangxi Seasonal patterns in nitrogen and phosphorus and resorption in leaves of four tree species Low-temperature tolerance characteristic and ecological evaluation of broad-leaved evergreen tree species Leaf longevity of main evergreen tree species of Guiyang City Photosynthesis-nitrogen relationship in evergreen and deciduous tree species at different altitudes on Mao’er Mountain, Guangxi Characteristics of Photosynthesis and Transpiration of Five Evergreen Tree Species in Summer CHANGE OF PHOTOSYNTHETIC RATE AND RESPONSE TO LOW WATER POTENTIAL OF EVERGREEN TREE SPECIES IN THE PROCESS OF HIBERNATION