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| 沙冬青光合速率日变化及其影响因子研究 | |
| 引用本文： | 李禄军,车克钧,蒋志荣,杨占彪,柴成武,邵玲玲. 沙冬青光合速率日变化及其影响因子研究[J]. 干旱区资源与环境, 2007, 21(5): 141-145 |
| 作者姓名： | 李禄军 车克钧 蒋志荣 杨占彪 柴成武 邵玲玲 |
| 作者单位： | 1. 甘肃农业大学林学院,兰州,730070 2. 甘肃省白龙江林业管理局,兰州,730050 |
| 基金项目： | 甘肃省南北两山植物资源调查研究项目 |
| 摘 要： | 采用Li-6200光合分析仪,在自然条件下对沙冬青(A.mongolicus(Maxim)Chengf.)光合作用日进程进行了观测,结果表明:在夏季晴天条件下,沙冬青Pn日变化为双峰曲线,峰值分别出现在11:00时和15:00时,具有典型的“光合午休”特征。相关分析和多元回归分析表明,光量子密度和气孔阻力是影响沙冬青叶片Pn日变化的主要生态因子。 |
| 关 键 词： | 沙冬青 光合速率 日变化 光量子密度 气孔阻力 |
| 文章编号： | 1003-7578（2007）05-141-05 |
| 收稿时间： | 2006-04-03 |
| 修稿时间： | 2006-04-03 |
Studies on the Diurnal Variations of Net Photosynthesis Rate and the Effect of Environmental Factors on A. mongolicus |
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| LI Lu-jun,CHE Ke-jun,JIANG Zhi-rong,YANG Zhan-biao,CHAI Cheng-wu,SHAO Ling-ling. Studies on the Diurnal Variations of Net Photosynthesis Rate and the Effect of Environmental Factors on A. mongolicus[J]. Journal of Arid Land Resources and Environment, 2007, 21(5): 141-145 | |
| Authors: | LI Lu-jun CHE Ke-jun JIANG Zhi-rong YANG Zhan-biao CHAI Cheng-wu SHAO Ling-ling |
| Affiliation: | 1. College of Forestry, Gansu Agricultural University, Lanzhou 730070, Gansu; 2. Bailong River Forestry Management Bureau, Lanzhou 730020, Gansu. China |
| Abstract: | Diurnal variations of photosynthesis of A.mongolicus 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 dual-peaked.The peak values appeared at 11:00 and 15:00 respectively.The first peak value was 6.031 μmolCO_2·m-2·s-1 and the second one was 5.296 μmolCO_2·m-2·s-1.There was a clear depression at noon,which was 4.798 μmolCO_2·m-2·s-1 appeared at 13:00.The analysis of correlation and stepwise multi-regression showed that the main ecological factors affecting photosynthetic diurnal variation of A.mongolicus were photo flux density and stomatal resistance. |
| Keywords: | A. mongolicus net photosynthesis rate diurnal variation photo flux density stomatal resistance |
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