摘要
对5个茶树品种的净光合和蒸腾速率进行比较分析,对光响应模型进行初步探讨。5个品种的蒸腾速率日变化均是单峰型,峰值出现的时间和变化幅度则存在极大差异;净光合速率出现单峰型和双峰型,单峰型在10:00达到峰值,双峰型则分别在8:00和14:00达到峰值。品种间的蒸腾速率和净光合速率差异程度,在不同时间段上是不同的。光响应拟合表明用SAS非线性拟合方法可以对光响应模型得到很好的拟合。
The net photosynthetic rate （ Pn ） and Transpiration rate （ Tr） as well as light response model of five tea cultivars were studied in this article. The results showed that there was one single peak in each Tr＇ s diurnal curve of five cultivars, but the peak value and its appearance varied among the five cultivars. For Pn, two peaks were observed in the diurnal curve of ＇ Yingshuang＇ cultivar, which occurred at 8：00 and 14：00 respectively, and only one peak was found in the other four cultivars respectively, and all occurred at 10：00. The differences of Pn and Tr between cultivars varied with the period of time. The Light saturation point （LSP） and Light compensation point （LCP） of tea cultivars were obviously affected by fitring hyperbola, fitting method, and choosing parameters. The NLINE method SAS was a good method to fitting light response model.
出处
《林业科技开发》
2007年第4期21-24,共4页
China Forestry Science and Technology
基金
江苏省农业科技攻关项目"丘陵山区困难立地适生树种选择及高效复合经营技术研究与应用"(BE2005368)
江苏省农业三项工程"困难立地适生造林树种选择及高效林农复合经营技术研究与应用"[SX(2004)083]
关键词
茶树
净光合速率
蒸腾速率
叶绿素荧光
光响应拟合模型
光饱和点
光补偿点
Tea
Net photosynthetic rate （ Pn ）
Transpiration rate （ Tr ）
Chlorophyll fluorescence
Fitting light response model
Light saturation point （LSP）
Light compensation point （LCP）
作者简介
杜旭华（1982-），男，博士生，研究方向为经济林栽培生理。通讯地址：210037，南京市龙蟠路159号。
通讯作者：彭方仁，男，教授，博士生导师。
