应用生态学报2018，Vol.29Issue(1)：1-10,10.DOI:10.13287/j.1001-9332.201801.003
太行山南麓栓皮栎和刺槐光合作用-CO2响应模拟
Simulation on photosynthetic-CO2 response of Quercus variabilis and Robinia pseudoacacia in the southern foot of the Taihang Mountain, China
摘要
Abstract
In this study,leaf photosynthetic CO2-response curves of Quercus variabilis and Robinia pseudoacacia were measured using a Li-6400XT photosynthetic measurement system in the southern foot of the Taihang Mountain,China.The rectangular hyperbola model (RH),nonrectangular hyperbola model (NRH) and Ye model (YZP) were used to fit photosynthetic-CO2 response curves and compare photosynthetic parameters,including the maximum net photosynthetic rate (Amax),the initial carboxylation rate (η),light respiration rate (Rp),CO2 compensation point (CCP) and CO2 saturation point (CSP).Compared with the NRH and YZP models,Amax,η,Rp and CCP obtained by the RH model were higher,and were 59.8％,128.6％,133.4％ and 19.8％ higher than the measured values.The accuracy of the RH model was lower and its relative error was higher than that of the NRH and YZP models.Compared with the RH and YZP models,Amax fitted by the NRH model was higher,and was 11.1％ higher than the measured value.η,Rp and CCP fitted by the NRH model were closer to the measured values.CO2 saturation phenomenon of photosynthesis could be simulated by the YZP model,and Amax and CSP were fitted well.A Rp and CCP in the shaded leaves of Q.variabilis were 31.3％,5.2％ and 14.3％ lower than those in the sunlit leaves.Amax Rp and CCP in shaded leaves of R.pseudoacacia were 23.5％,11.0％ and 5.4％ more than those in the sunlit leaves.η in the shaded leaves of Q.variabilis and R.pseudoacacia were 6.9％ and 7.0％ higher than those in the sunlit leaves,respectively.Rp and CCP of R.pseudoacacia leaves had linear relationships with temperature (T) and photosynthetic active radiation (PAR),and η had a significant relationship with stomatal conductance (gs).ηof Q.variabilis leaves was linearly correlated with PAR and gs,and CCP was affected by T and relative humidity.A max of Q.variabilis leaves had significant positive linear relationships with RH and gs.关键词
栓皮栎/刺槐/光合作用-CO2响应/阴/阳叶/光合参数Key words
Quercus variabilis/Robinia pseudoacacia/photosynthetic-CO2 response/shaded/sunlit leaf/photosynthetic parameter引用本文复制引用
任博,李俊,同小娟,母艳梅,孟平,张劲松..太行山南麓栓皮栎和刺槐光合作用-CO2响应模拟[J].应用生态学报,2018,29(1):1-10,10.基金项目
本文由国家自然科学基金项目(31570617,31100322)和中央高校基本科研业务费专项(YX2011-19)资助 This work was supported by the National Natural Science Foundation of China (31570617,31100322) and the Fundamental Research Fund for the Central Universities (YX2011-19). （31570617,31100322）
