天台山东南石栎光合生理生态特性  

Photosynthetic ecophysiological characteristics of Lithocarpus harlandii in Tiantai Mountain of Zhejiang Province,China.

作　　者：柯世省[1] 金则新[1] 林恒琴[1] 张文标[1] 

机构地区：[1]台州学院生物系,临海317000

出　　处：《生态学杂志》2004年第3期1-5,共5页Chinese Journal of Ecology

基　　金：浙江省自然科学基金项目 ( 3 992 0 3 );浙江省教育厅科研计划项目( 2 0 0 3 0 769)

摘　　要：分别对林窗、林缘和林下 3种生境的东南石栎光合生理生态特性进行了研究。结果表明 ,林窗、林缘生境的东南石栎在 6月、8月和 11月晴天 ,净光合速率日进程为双峰型 ,2月晴天为单峰型 ;林下一年不同月份的净光合速率日进程均为单峰型。 8月 ,东南石栎叶片已发育成熟 ,叶绿素含量高 ,硝酸还原酶活力大 ,水热条件优越 ,光照强 ,此时光合能力达到一年中的高峰。在 8月 ,东南石栎的光补偿点最低 ,光饱和点最高 ;东南石栎的光补偿点较低、光饱和点较高 ,其对光适应的生态幅较宽。东南石栎日均净光合速率比伴生种类高 。The photosynthetic ecophysiological characteristics of Lithocarpus harlandii at the three habitats,i.e,canopy gap,forest edge and understory,was studied.In clear days,the curves of diurnal variations of net photosynthetic rates (P n) of L.harlandii had two peaks at canopy gap and forest edge in Jun.,Aug. or Nov.,while the curves had one peak in Feb.In Aug,L.harlandii had the highest P n in a year because of mature leaves,high chlorophyll contents,strong nitrate reductase activity,superior water and heat environment,and strong light.L.harlandii had the lowest light compensation points (LCPs) and the highest light saturation points (LSPs) in Aug. than in other months.L.harlandii had lower LCPs,higher LSPs,and wider ecological ranges of photo-adaptability. The higher P n of L. harlandii than its accompanying species indicated that higher photosynthetic capacity mad it in a favourable position to get dominating status for occupying the community space.

关 键 词：净光合速率 叶绿素含量 硝酸还原酶活力 东南石栎 天台山 

分 类 号：Q948[生物学—植物学]