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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,2015,31(4):286-291. [点击复制]
- CHAI Sheng-feng,TANG Jian-min,YANG Xue,XIE Wei-ling,WEI Xiao,JIANG Yun-sheng.Fitting Analysis for 4 Photosynthesis Light Response Curve Models of Keteleeria calcarea[J].Journal of Guangxi Academy of Sciences,2015,31(4):286-291. [点击复制]
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| 4种模型对黄枝油杉光合光响应曲线的拟合分析 |
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柴胜丰1, 唐健民1, 杨雪2, 谢伟玲3, 韦霄1, 蒋运生1
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| (1.广西壮族自治区中国科学院广西植物研究所, 广西桂林 541006;2.广西大学农学院, 广西南宁 530004;3.广西师范大学生命科学学院, 广西桂林 541004) |
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| 摘要: |
| [目的]为找出黄枝油杉(Keteleeria calcarea)光合光响应曲线的最佳模型,以得到较为准确的光合特征参数。[方法]采用Li-6400便携式光合系统对黄枝油杉的光合光响应曲线进行测定,并通过4种模型(直角双曲线模型、非直角双曲线模型、指数模型和直角双曲线修正模型)对其光响应曲线进行拟合。[结果]直角双曲线模型和非直角双曲线模型的最大净光合速率(Pnmax)拟合值高于实测值,而指数模型和直角双曲线修正模型的拟合值与实测值较为接近;在4种模型中,直角双曲线修正模型的Isat拟合值(850.45 μmol·m-2·s-1)与实测值(800 μmol·m-2·s-1)最为接近,其余3种模型求得的Isat远低于实测值。直角双曲线修正模型对黄枝油杉的光响应曲线拟合得到的Pnmax、光饱和点(Isat)、光补偿点(Ic)和暗呼吸速率(Rd)分别为5.06 μmol·m-2·s-1、850.45 μmol·m-2·s-1、7.86 μmol·m-2·s-1和0.816 μmol·m-2·s-1。[结论]直角双曲线修正模型的拟合效果最好,指数模型次之,非直角双曲线模型和直角双曲线模型的拟合效果最差。 |
| 关键词: 黄枝油杉 光响应曲线 光响应模型 光合特性 |
| DOI： |
| 投稿时间：2015-06-11修订日期：2015-07-10 |
| 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。 |
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| Fitting Analysis for 4 Photosynthesis Light Response Curve Models of Keteleeria calcarea |
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CHAI Sheng-feng1, TANG Jian-min1, YANG Xue2, XIE Wei-ling3, WEI Xiao1, JIANG Yun-sheng1
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| (1.Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and the Chinese Academy of Sciences, Guilin, Guangxi, 541006, China;2.College of Agriculture, Guangxi University, Nanning, Guangxi, 530004, China;3.College of Life Science, Guangxi Normal University, Guilin, Guangxi, 541004, China) |
| 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 model,were applied to fitting its light response curve.[Results] According to calculated photosynthetic parameters by 4 models,maximum net photosynthetic rate (Pnmax) estimated by rectangular hyperbola and non-rectangular hyperbola model were higher than that measured by experiment,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) and Rd (respiration rate) were 5.06 μmol·m-2·s-1,850.45 μmol·m-2·s-1,7.86 μmol·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. |
| Key words: Keteleeria calcarea light response curve light response model photosynthetic characteristic |
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