油茶-茶复合模式对茶树光合特性的影响  

Effects of oiltea-tea compound mode on photosynthetic characteristics in tea bush

作　　者：季琳琳[1] 佘诚棋[2] 肖正东[1] 程鹏[3] 赵康[4] 

机构地区：[1]安徽省林业科学研究院,安徽合肥230031 [2]安徽省林业科技推广总站,安徽合肥230031 [3]安徽省林业厅,安徽合肥230031 [4]安徽农业大学,安徽合肥230036

出　　处：《经济林研究》2013年第1期39-43,共5页Non-wood Forest Research

基　　金：安徽省科技攻关计划项目(09010304023)

摘　　要：为了揭示油茶-茶复合模式的生理生态学理论基础,分析了油茶-茶复合模式和纯茶模式内茶树叶光合特性日变化及季节变化的差异情况,并对茶树光合特性与生态因子进行了多元线性逐步回归分析。结果表明:纯茶模式内茶树净光合速率的日变化曲线为双峰曲线,即午休现象较为明显,而复合模式的为单峰曲线;从整体上看,纯茶模式内茶树叶片的净光合速率高于复合模式;气孔导度的日变化曲线,纯茶呈单峰曲线,而复合模式的呈双峰曲线;胞间CO2浓度的日变化曲线与净光合速率的基本相反,纯茶和复合模式的蒸腾速率表现为先上升后下降的变化趋势。多元线性回归分析结果表明,两种模式下影响净光合速率的主要因子都有气孔导度、胞间CO2浓度、蒸腾速率、空气相对湿度及空气温度,而油茶-茶复合模式的茶树还受到光合有效辐射的影响。In order to find out photosynthetic eco-physiological characteristics of oiltea-tea compound mode, differences of diurnal variation and seasonal variation of the compound mode and pure tea mode were analyzed, and photosynthetic characteristics and ecological factors of tea bush were analyzed by multiple linear stepwise regression. The results show diurnal variation of net photosynthetic rate of tea bush in pure tea mode is a double-peak curve, and midday depression is obvious, while it is a single-peak curve in the compound mode. Overall, the net photosynthetic rate of tea bush in pure tea mode is higher than that in the compound mode. the diurnal variation of stomatal conductance of tea in pure tea mode is a single-peak curve, but it is a double-peak curve in the compound mode. The diurnal variation of intercellular CO2 concentration is opposite to that of net photosynthetic rate. The transpiration rate of tea in the two modes is increased and then decreased. The results of multiple regression analysis indicate that main influence factors of net photosynthetic rate in the two modes is stomatal conductance, intercellular CO： concentration, transpiration rate, air relative humidityand air temperature, and it also is affected by photosynthetic active radiation in the compound mode.

关 键 词：油茶-茶复合 光合生理生态 日变化 回归分析 

分 类 号：S601[农业科学—园艺学] S571.1