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当前位置: 首页 > 文章 > 竹节树幼苗的光响应特性及其曲线最适模型选择 西南林业大学学报(自然科学) 2018,38 (4) 1-5
Position: Home > Articles > Photoresponse Characteristics of Carallia brachiata Seedlings and Selection of Optimal Curve Models Journal of Southwest Forestry University(Natural Sciences) 2018,38 (4) 1-5

竹节树幼苗的光响应特性及其曲线最适模型选择

作  者：
彭莉霞;黄东兵;吴德;曾振宇;余栋华
单  位：
广东如春园林设计有限公司;广东省东江林场;广东生态工程职业学院
关键词：
竹节树;幼苗;光响应曲线;光合速率
摘  要：
为揭示竹节树幼苗的光合生理特性,以竹节树幼苗为研究对象,利用Li-6400测定其光合-光响应曲线,并从常用的6种光合曲线拟合模型中筛选出适用于竹节树幼苗的光合-光响应模型。结果表明:直角双曲线修正模型拟合的光合-光响应曲线最佳,具有符合植物生长规律的光抑制现象。在直角双曲线修正模型的光合参数中,P_(max)、I_(sat)、I_c、R_d与实测值最接近,决定系数R~2为0.998,平均绝对误差(MAE)和均方误差(MSE)最小,模型具有较高的拟合精确度。因此,直角双曲线修正模型为竹节树幼苗最佳的光合-光响应曲线拟合模型。
译  名：
Photoresponse Characteristics of Carallia brachiata Seedlings and Selection of Optimal Curve Models
作  者：
Peng Lixia;Huang Dongbing;Wu De;Zeng Zhenyu;Yu Donghua;Guangdong Eco-engineering Polytcchnic;Ruchun Landscape;Dongjiang Forest Farm;
关键词：
Carallia brachiata;;seedlings;;light-response curve;;photosynthesis rate
摘  要：
In order to reveal the photosynthetic physiological characteristics of Carallia brachiata,C. brachiata seedlings were selected as the research object. The photosynthetic-light response curves was measured by Li-6400,and photosynthetic-optical response models suitable for C. brachiata seedlings were screened from the commonly used 6 photosynthetic curve fitting models. The results showed that the photosynthetic-optical response curve fitted by the right-angle hyperbola correction model was the best,and had a photo-inhibition phenomenon in accordance with the plant growth law. The P_(max),I_(sat),I_c,R_d were the closest to the measured values in the modified rectangular hyperbola model. The correlation coefficient R~2 was 0. 998,which was the largest among the 6 models. The MAE and MSE were the smallest and the model had higher fitting accuracy. Therefore,the hyperbola correction model was the best fitting model for the photosynthesis-photoresponse curve of C. brachiata.

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