间伐果园梨树叶片叶绿素荧光的部位间差异  

The Difference of Chlorophyll Fluorescence in Leaves of Different Positions of Pear Tree in Tree-thinning Orchard

作　　者：谢鹏[1] 蔚露[1] 牛自勉[1] 韩苹苹[1] 李志强[1] 

机构地区：[1]山西省农业科学院现代农业研究中心,山西太原030031

出　　处：《山西农业科学》2015年第6期682-685,704,共5页Journal of Shanxi Agricultural Sciences

基　　金：国家科技支撑计划课题(2014BAD16B00)

摘　　要：在15年生梨树高光效开心树形果园进行了间伐试验,比较了间伐果园梨树东、西、南、北侧以及内膛、上部叶片的叶绿素荧光参数,通过PSII的电子传递速率(ETR)、PSII的实际光合量子产量(Y(II))、调节性能量耗散的量子产量(Y(NPQ))以及非调节性能量耗散的量子产量(Y(NO))对光合有效辐射(PAR)的响应曲线,并得出PAR-ETR响应曲线的拟合参数。结果表明,与其他部位相比,间伐果园梨树东、西侧叶片ETR和Y(II)较高,Y(NPQ)和Y(NO)较低,说明这2个部位叶片有着较好的光能利用特性与光环境适应性。Open-center training system had been carried out at tree-thinning 15 years old pear orchard of high light egiciency, and the response curves of chlorophyll fluorescence parameters： electron transport rate （ETR）, effective photochemical quantum yield of pho- tosystem II （Y （II））, quantum yield of regulatory energy dissipation （Y （NPQ））, and non-regulatory energy dissipation （Y （NO）） to photosynthetic active radiation （PAR）, along with the fitting parameters of PAR-ETR response curves, were determined and compared in pear leaves of east, west, south, north, inner, upper parts in tree-thinning orchard. The results showed that leaves in east and west parts of pear trees in tree-thinning orchard had the higher ETR, Y（II）, and the lower Y（NPQ）, Y（NO） eompared with other positions, which in- dicated that leaves in these two positions had better utilities of light and adaotations to lidat environment.

关 键 词：梨 间伐 部位 叶片 叶绿素荧光 

分 类 号：S661.2[农业科学—果树学]