包含CO2因子的冠层光合作用简化模型及其关键参数数值敏感分析  

A simplified model of canopy photosynthesis including the impact of CO_2 and numerical analysis of the key parameter

作　　者：李明星[1] 刘建栋[2] 王馥棠[2] 刘文泉[2] 戴晓苏[3] 廖要明[3] 

机构地区：[1]中国科学院大气物理研究所东亚区域气候环境重点实验室 [2]中国气象科学研究院,北京100081 [3]国家气候中心,北京100081

出　　处：《气象科学》2008年第4期370-376,共7页Journal of the Meteorological Sciences

基　　金：国家自然科学基金(40575057);国家科技部社会公益研究项目(2005DIB4J107)

摘　　要：利用美国Licor公司生产的Li-6200便携式光合作用测定仪对冬小麦叶片光合作用进行了较为系统的测定研究,在实测资料支持下建立了包含CO2因子的叶片和冠层光合作用模型,验证结果表明,模型具有较高准确性。利用模型对CO2影响参数μ进行数值敏感分析,结果表明:对叶片光合而言,μ=0.83时叶片光合作用模型拟合最好,随μ减小或增大,拟合精度均下降;对冠层光合而言,μ=0.83时模拟光合日总量达到最大值,μ减小或增大,光合日总量均下降。多因子数值分析表明:在辐射值较大的状况下,μ对冠层光合的影响更为显著。The leaf photosynthesis of winter wheat was measured with Licor-6200 portable photosynthesis analyzer. Based on these measurements, the leaf and canopy photosynthesis models were established. The validations showed that the models simulated the leaf and canopy photosynthesis accurately. Numerical sensitivity analysis of the key parameter was performed and the results showed that the model of leaf photosynthesis was more accurate when the parameter μ equaled 0. 83, and the accuracy decreased with μ increasing or decreasing; the model of canopy photosynthesis can be used to describe more sufficiently the impact of CO2 on canopy photosynthesis, when the key parameter μ equaled 0. 83 ; the comprehensive numerical analysis indicated that the impact of parameter μ on canopy photosynthesis was more significant under stronger radiation conditions.

关 键 词：CO2 冠层光合作用 简化模型 关键参数 数值分析 

分 类 号：O241[理学—计算数学] S718.43[理学—数学]