温室内不同茶树品种净光合速率及其生理生态因子日变化  

Diurnal Variations of Net Photosynthetic Rate and Eco-physiological Factors of Tea in Greenhouse

作　　者：杜旭华[1] 马健[1] 彭方仁[1] 

机构地区：[1]南京林业大学森林资源与环境学院,江苏南京210037

出　　处：《浙江林业科技》2007年第3期28-33,共6页Journal of Zhejiang Forestry Science and Technology

基　　金：江苏省科技攻关项目(农业)(BE2005368);江苏省农业三项工程项目SX(2004)083

摘　　要：以5个茶树品种为试材,测定了5月底温室内茶树的光合日变化。在整个测定过程中,温室内处于一个弱光高温的环境。5个品种光合日变化表明,浙农139与乌牛早、龙井43在8:00-14:00的光合速率有极显著的差异;净光合速率的日变化出现单峰型和双峰型,迎霜呈双峰型日变化,其出现午休的现象是茶树自身生理节奏的体现;在弱光高温环境下,温度在35℃以上时茶树的光合作用受到抑制,这种抑制是温度影响下的气孔限制和非气孔限制共同作用的结果。Diurnal photosynthetic variations of five tea cultivars were determined in May in greenhouse with high temperature and low light. The result showed significant differences of Pn among Zhenong 139, Longjing 43 and Wuniuzao during 8：00 to 14：00. The curve of diurnal net photosynthetic rate （Pn） variation of Yingshuang had two peaks and its obvious phenomenon of midday depression was the circadian representation. When the temperature was higher than 35℃ in this environment, photosynthesis would be restrained, resulted by the multi-effecting of stoma restriction and non-stoma restriction.

关 键 词：茶树 光合日变化 午休 生理生态因子 叶片温度 净光合速率 

分 类 号：S571.1[农业科学—茶叶生产加工]