广西科学院学报Issue(4)：286-291,6.
4种模型对黄枝油杉光合光响应曲线的拟合分析
Fitting Analysis for 4 Photosynthesis Light Response Curve Models of Keteleeria calcarea
摘要
Abstract
[Objective]In order to find the best photosynthesis light response curve model and obtain a more accurate photosynthetic parameters,the photosynthetic characteristics of Keteleeria calcarea was studied.[Methods]The photosynthesis light response curve was measured using the Li - 6400 portable photosynthesis system.4 light response curve models,including rectangular hyperbolic model, non-rectangular hyperbolic model,exponential model and modified rectangular hyperbolic mod-el,were applied to fitting its light response curve.[Results]According to calculated photo-synthetic parameters by 4 models,maximum net photosynthetic rate (Pnmax)estimated by rectan-gular hyperbola and non-rectangular hyperbola model were higher than that measured by exper-iment,while Pnmax fitted by exponential model and modified rectangular hyperbolic model were similar with that measured by experiment.Isat estimated by rectangular hyperbolic model,non-rectangular hyperbolic model and exponential model were far lower than the measured data,only Isat estimated by modified rectangular hyperbolic model was the closest to the measured data.The modified rectangular hyperbola model was the best model for fitting photosynthesis light response curve of Keteleeria calcarea.The Pnmax,Isat,Ic (compensation point)andRd(respiration rate)were 5.06μmol·m-2·s-1,850.45μmol·m-2·s-1,7.86μmol·m-2·s-1 and 0.816 μmol·m-2 ·s-1,respectively.[Conclusion]According to the relative errors of measured and fitted values of photosynthesis light response parameters,the sequence of fitting effect of the four light response models in descending order was modified rectangular hyperbola model > exponential model > non-rectangular hyperbola model >rectangular hyperbola model.关键词
黄枝油杉/光响应曲线/光响应模型/光合特性Key words
Keteleeria calcarea/light response curve/light response model/photosynthetic characteristic分类
农业科技引用本文复制引用
柴胜丰,唐健民,杨雪,谢伟玲,韦霄,蒋运生..4种模型对黄枝油杉光合光响应曲线的拟合分析[J].广西科学院学报,2015,(4):286-291,6.基金项目
广西科技攻关项目(桂科能1598025-49),区林业科技项目(桂林科字2012第26号),桂林市科技攻关项目(20130414)和广西植物研究所基本业务费项目(桂植业12011)资助。 （桂科能1598025-49）
