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。
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 correetion model was the best, and had a photo-inhibition phenomenon in accordance with the plant growth law. The Pmax Isat, Ic, Rd were the closest to the measured values in the modified rectangular hyperbola model. The correlation eoettleient R2 was 0. 998, which was the largest among the 6 models. The MAE and MSE were the smallest and the model had higher ftting accuracy. Therefore, the hyperbola eolTeetion model was the best fitting model for the photosynthesis-photoresponse curve of C. brachiata.
作者
彭莉霞
黄东兵
吴德
曾振宇
余栋华
Peng Lixia;Huang Dongbing;Wu De;Zeng Zhenyu;Yu Donghua(Guangdong Eco-engineering Polytechnic,Guangzhou Guangdong 510520,China;Ruchun Landscape,Guangzhou Guangdong 510530,China;Dongjiang Forest Farm,lleyuan Guangdong 517400,China)
出处
《西南林业大学学报（自然科学）》
CAS
北大核心
2018年第4期1-5,共5页
Journal of Southwest Forestry University：Natural Sciences
基金
校级研究与发展计划项目(2015kykt-xj-jb02)资助
关键词
竹节树
幼苗
光响应曲线
光合速率
Carallia brachiata
seedlings
light-response crove
photosynthesis rate
