The typical vegetation coverage in Guiyang is Karst vegetation,among which Karst evergreen conifer forest,Karst evergreen broadleaf forest and Karst evergreen shrubs are of great significance on the local ecological system.This research investigated the leaf longevity of main evergreen tree species of Guiyang Karst vegetation by taking the dominant species and companion species as the main objects in varied life-form species and computing the average life expectancy(Ex) based on life-table method.The results are as follows: ① The leaf lifespan of evergreen tree species mostly ranged from 0 to 2 years,with large variation and different replacing periods of every tree species.② Difference in leaf lifespan of varied life-form species exsited.Average leaf lifespan was relatively longer in small trees and shrubs than in large trees,but was not significantly different.③The species leaf lifespan was obviously different in varied forms of vegetation.Reckoning with the speciality of vegetation in Guiyang,the present study discussed the influencing factors of leaf lifespan and concluded that the leaf lifespan had its own specific scatter pattern in Guiyang.
周自宗, 袁莉, 王震洪*. 贵阳市常绿树种叶子寿命的研究[J]. , 2008, 27(3): 148-153.
ZHOU Zi-zong, YUAN Li, WANG Zhen-hong. Leaf longevity of main evergreen tree species of Guiyang City. , 2008, 27(3): 148-153.
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