杨梅光合作用与生理生态因子的关系  

Relationship between photosynthesis and physioecological factors of bayberry (Myrica rubra) tree

作　　者：金志凤[1] 李永秀[2] 景元书[2] 王立宏 

机构地区：[1]浙江省气候中心,杭州310017 [2]南京信息工程大学应用气象学院,南京210044 [3]浙江省台州市黄岩区果树技术推广总站,浙江台州318020

出　　处：《果树学报》2008年第5期751-754,共4页Journal of Fruit Science

基　　金：浙江省科技厅项目(2005C33050)

摘　　要：采用LI—6400光合作用仪测定了东魁杨梅成熟期(6月下旬)叶片的净光合速率(Pn)以及气孔导度(Gs)、蒸腾速率(Tr)、光合有效辐射(PAR)、叶片温度(Tl)、空气相对湿度(RH)等生理生态因子的日变化,运用数理统计方法分析了Pn与各因子的相关关系。结果表明,东魁杨梅成熟期Pn日变化为双峰型曲线,存在"午休"现象;Pn与Gs和Tr均存在显著的二次曲线关系,与PAR有双曲线关系,与Tl有S型曲线关系,与RH有二次曲线关系。杨梅光合作用与各生理生态因子的关系密切,可为探讨杨梅合理栽培和区域选择提供一定的科学依据。Diurnal changes of net photosynthetic rate（Pn）of Dongkui （Myrica rubra Sieb. et Zucc.） cultivar at maturing stage, and the diurnal changes of stomatal conductance （Gs）, transpiration rate （Tr）, photosynthetically active radiation （PAR）, leaf temperature （Tl） and air relative humidity （RH）were measured using LI-6400 Portable Photosynthesis System. The relationship between Pn and Gs , Tr , PAR, Tl, RH were analyzed respectively. The results showed that the diurnal change of net photosynthetic rate presented a double peak curve with a slight ＂midday depression＂. There existed a conic relation between Pn and Gs, Tr. A hyperbola relation was found between Pn and PAR, S function relationship between Pn and Tl, a conic relationship between Pn and RH .The close correlations between photosynthesis of Myrica rubra and physioecological factors provide scientific bases for reasonable planting and adaptable choice of cultivars ofMyrica rubra Sieb. et Zucc.

关 键 词：杨梅 净光合速率 生理生态因子 相关性 

分 类 号：S667.6[农业科学—果树学]