东灵山地区辽东栎的叶群体统计

 辽东栎是我国暖温带落叶阔叶林主要优势种之一。本研究中，我们采用随机枝取样法，研究了东灵山地区辽东栎的叶群体的数量动态。结果表明：(1)不同个体，同一个体内部不同层次，叶数量动态趋势都基本一致。现叶期和叶落半衰期很短，现叶方式为爆发型。(2)不同个体间叶期差异很大，暗示在辽东栎种群内部或许存在有一定的遗传分化。(3)叶数量动态同气候因子变化相吻合，有利于辽东栎的碳获取。

LEAF DEMOGRAPHY OF QUERCUS LIAOTUNGENSIS IN DONGLING MOUNTAIN

Quercus Liaotungensis is an important dominant species in the warm temperate zone. In this study,the leaf demography was implemented with the method of randomized branch sampling. The results showed that 1)The leaf population dynamics was basically similar among individual trees and among different layers of the same individual.The leaf duration and the time in which half of the total leaves fell were very short. The leaf emergence pattern was of flush type; 2) Leaf duration varied greatly among individuals, which can be due to genetic differentiation in the population,but not micro environment change; 3) Leaf population dynamics coincided with climate change,which was beneficial to carbon gain.