红背桂光合特性日变化研究  

Research on Diurnal Variation of Potosynthetic Characteristics for Excoecaria Cochinchinensis Lour.

作　　者：廖友媛[1] 

机构地区：[1]湖南工业大学,湖南株洲412008

出　　处：《湖南工业大学学报》2008年第6期36-38,共3页Journal of Hunan University of Technology

摘　　要：采用LI-6400便携式光合测定系统,在10月份对红背桂成熟叶片的光合作用日进程主要生理生态指标进行测定,研究其日变化。结果表明:红背桂的净光合速率日变化呈明显的"双峰型"曲线,峰值分别出现在8:00时和15:00时;存在光合午休现象,且光合午休的主要原因是气孔限制。In order to research the diumal variation of excoecaria cochinchinensis Lour, the main physiological and ecological index under photosynthesis for its mature leaves were measured with LI-6400 portable photosynthesis determination system in october. The result showed that the diurnal process of photosynthetic rate was an obvious double-peak curve, the peak values were at 8：00 am and 15：00 pm. The photosynthesis had a significant midday depression phenomenon, and the main reason for this depression was the restrictions on stomatals.

关 键 词：红背桂 光合速率 日变化 气孔导度 

分 类 号：Q945[生物学—植物学]