柠条叶片光合速率日变化特征的研究  

The Diurnal Variations of Photosynthesis in Leaves of Caragana microphylla Lam

作　　者：邵玲玲[1] 李毅[1] 李禄军[1] 李小军[2] 

机构地区：[1]甘肃农业大学林学院,甘肃兰州730070 [2]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000

出　　处：《西北林学院学报》2007年第1期12-14,30,共4页Journal of Northwest Forestry University

摘　　要：采用Li-6 200光合分析仪,在自然条件下对柠条(Caragana microphyllaLam)光合作用日进程进行了观测。结果表明:在夏季晴天条件下,柠条光合速率(Pn)日变化呈单峰曲线,峰值出现在上午11:00时,约为8.092μmolCO2.m-2.s-1;柠条蒸腾速率(TRAN)的日变化也为一单峰曲线,但柠条蒸腾速率日变化最大值出现在13:00-15:00时,约为9.392μmolH2O.m-2.s-2。采用相关分析和多元逐步回归分析方法,得出光合速率和蒸腾速率与大气CO2浓度、胞间CO2浓度、水气压、水气压亏缺等生理生态因子间的相关关系,并建立了相应的影响因子回归方程,相关系数分别可达1.000、0.999。Diurnal variations of photosynthesis of Caragana microphylla Lam were studied under natural conditions by Li-6200 photosynthesis analyzer. The results indicated that in the typical summer sunny days, the curve of diurnal variation of net photosynthetic rate （Pn） was one-peak curve. And the peak value was 8. 092 μmol · m^-2 · s^-1 , which occurred at 11：00 oclock in the morning. The curve of diurnal variation of transpiration rate was also one-peaked, but the peak value appeared at 13：00 to 15：00, which was 9. 392 μmol · m^-2 · s^-1or so. By the methods of correlation analysis and stepwise multi-regression analysis, the correlations between them and environmental factors were assessed. The related equation were also constructed in this paper, and correlation coefficients were 1. 000 and 0. 999, respectively.

关 键 词：柠条 光合速率 蒸腾速率 日变化 相关分析 逐步多元回归分析 

分 类 号：S793.301[农业科学—林木遗传育种]