文献类型：期刊文献

中文题名：海南岛尖峰岭热带山地雨林下层乔木中华厚壳桂光合生理生态特性的研究

英文题名：Study on Photosynthetic Physiological Ecology of Cryptocarya chinensis in Tropical Montane Rain Forest in Jianfengling,Hainan Island

作者：陈德祥[1] 李意德[1] 骆土寿[1] 陈步峰[1] 林明献[1]

第一作者：陈德祥

机构：[1]中国林业科学研究院热带林业研究所

年份：2003

卷号：16

期号：5

起止页码：540-547

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金重大项目(39899370);国家科技部和国家林业局"全国重点野外科学观测试验站项目(2001 08)"的研究内容

语种：中文

中文关键词：海南岛尖峰岭;热带山地雨林;中华厚壳桂;光合作用;生理生态;光合作用;森林生态系统

外文关键词：Hainan Island Jianfengling;tropical montane rain forest;Cryptocarya chinesis;photosynthesis;physiological ecology

分类号：S718.5

摘要：2001年旱季,用Li 6400便携式光合测定仪对尖峰岭热带山地雨林下层乔木中华厚壳桂主要光合生理生态因子进行了初步测定,结果显示:冠层不同部位叶片的净光合速率无明显差异;中华厚壳桂具有较低的光饱和点(800μmol·m-2·s-1)、光补偿点(15～20μmol·m-2·s-1)和最大光合速率(≤7μmolCO2·m-2·s-1)等耐荫性光合特性,并且缺乏对高光强改变的光合调节能力,但对光斑却有快速的光合响应能力;短期内高CO2浓度会使其光合速率增加,但对气孔导度和蒸腾作用却有抑制作用;在光合最适温度范围内,温度的升高将明显促进光合作用,温度升高4℃能够使其净光合速率平均提高1 6倍,但一旦超过此范围,温度的升高却将抑制光合作用的进行。在自然条件下净光合速率与光照、温度、CO2浓度及气孔导度并无明显的相关关系,而在控制条件下却呈显著的曲线相关。
The factors of photosynthetic physiological ecology of Cryptocarya chinensis were measured with Li-6400 portable photosynthesis system under natural condition and control of irradiance,leaf temperature and CO2 concentration at tropical montane rain forest in Jianfengling,Hainan Island,during the dry season in 2001. The net photosynthesis ( Pn ) of leaves in the canopy did not vary much and it had the characteristics of low light saturation point (800 μmol·m-2 ·s-1 ),light compensation point ( LCP was between 15 and 20 μmol·m-2 ·s-1 ) and the maximal photosynthetic rate ( A max was less than 7　μmol CO2·m-2 ·s-1 ). The leaf photosynthesis could respond rapidly to the sunfleck but which lacked the adaptive responses when the high irradiance changed. The short-term response of Cryptocarya chinensis to enriched CO2 concentration could evidently increased the photosynthesis,however,the　stomatic conductance and transpiration would be inhibited. Temperature response of photosynthesis showed that the net photosynthetic rate could be increased by 1. 6　times when air temperature was increased by 4 ℃ among the suitable growing temperatures,but beyond that photosynthesis would be inhibited. There was no evident correlativity between photosynthesis and leaf temperature,irradiance,CO2 concentration and leaf conductance under natural growing conditions,but conic correlativity exists when the growing conditions were controlled.