Effects of human disturbance on spatial distribution pattern of main population of evergreen broadleaf trees Study on the Niche and Competition of Populations in Man-natural Mixed Forest of Cunninghamia lanceolata and Broadleaf Trees Effect of Crown Position on the Leaf Anatomical Traits and Nitrogen Content in Five Broadleaf Tree Species Responses of leaf unfolding and flowering to climate change in 12 tropical evergreen broadleaf tree species in Jianfengling, Hainan Island Seasonal change of leaf morphological traits of six broadleaf seedlings in South China EFFECTS OF FORESTATION BY KEEPING BROADLEAF TREES IN PLANTING CUNNINGHAMIA LANCEOLATA Patterns of Indigenous Broadleaf Tree Species Distributed in Guangdong Province Based on Cluster Analysis STUDIES ON THE FIRE-RESISTANCE OF 37 SPECIES OF CONIFEROUS AND BROADLEAF TREES AND IT‘S APPRAISAL