柠条叶片蒸腾速率日变化节律及其影响因子分析  

Diurnal Variations of Transpiration Rate in Leaves of Caragana microphylla and Factor Analysis

作　　者：李禄军[1] 蒋志荣[1] 车克钧 邵玲玲[1] 

机构地区：[1]甘肃农业大学,甘肃兰州730070 [2]甘肃省白龙江林业管理局,甘肃兰州730050

出　　处：《西部林业科学》2006年第3期104-106,共3页Journal of West China Forestry Science

摘　　要：采用Li-6200光合分析仪，在自然条件下对柠条叶片蒸腾速率的日进程进行了观测。结果表明：在夏季晴天条件下，柠条叶片蒸腾速率的日变化呈单峰曲线，峰值出现在13：00～15：00时，约为9．392μmolH2O·m^-2·s^-1。采用一元线性回归分析和逐步多元回归分析的方法，建立了柠条叶片蒸腾速率与大气温度、叶片温度、水汽压、水汽压亏缺等生理、生态因子间的回归方程。逐步多元回归分析结果表明，其蒸腾速率与水汽压和胞间CO2浓度的回归方程为：TRAN=0．563EAIR-0．00491CINT＋1．824（R^2=0．998）。Diurnal variations of transpiration rate in leaves of Caragana microphylla were studied under natural conditions by using Li-6200 photosynthesis analyzer. The results indicated that in the typical summer sunny days, the curve of diurnal variation of transpiration rate was one-peaked, and the peak value appeared at 13 ： 00 to 15 ： 00, whic was about μmolH2O·m^-2·s^-1 Using the method of regression analysis, the corrolations between transpiration rate and environmental factors were assessed. The regression equation between transpiration rate, water vapor pressure and intercellular CO2 concentration was TRAN = 0. 563EAIR -0. 004 91CINT ＋ 1. 824 （R^2=0.998）.

关 键 词：柠条 蒸腾速率 日变化 逐步多元回归分析 

分 类 号：S793.3[农业科学—林木遗传育种]