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.
出处
《西北林学院学报》
CSCD
北大核心
2007年第1期12-14,30,共4页
Journal of Northwest Forestry University
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
Caragana microphylla Lain
photosynthesis rate
transpiration rate
diurnal variation
correlation analysis
stepwise multi-regression analysis
