树形模式对梨树叶片荧光特性的影响  

Effect of Tree Form Models on Fluorescence Characteristics of Pear Leaves

作　　者：谢鹏[1] 牛自勉[1] 蔚露[1] 林琭[1] 王红宁[2] 

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 [2]山西省农业科学院果树研究所,山西太谷030800

出　　处：《山西农业科学》2016年第9期1263-1267,1307,共6页Journal of Shanxi Agricultural Sciences

基　　金：国家科技支撑计划课题(2014BAD16B03)

摘　　要：以玉露香梨高光效开心树形为试材进行了不同树形模式试验,测定了不同树形树冠区光能利用能力、光能利用特性日变化、光能利用适应性、光系统Ⅱ的光能传递特性、光能过剩时热耗散途径5个方面的试验参数,比较了开心树形与对照树形东、西侧叶片的叶绿素荧光参数的差异。结果表明,开心树形处理提高了梨树叶片一天中的光合有效辐射(PAR)与电子传递速率(ETR),并通过减少依赖于能量和类囊体膜质子梯度的猝灭(q E)来降低非光化学猝灭(q N),提高了果园梨树叶片的光能利用效率。Experiments of different tree form models were carried out with Yuluxiang pear of high light efficiency open-centered tree form as test materials. Potential light energy utilized ability, diurnal variation of light energy utilization, adaptation of light energy utilization, transmission of light energy in PS ]I, heat dissipation pathway of excess light energy of crown areas of different tree forms were determined. Difference of chlorophyll fluorescence parameters in pear leaves of east and west parts between the open-centered and control tree forms were compared. The results showed that treatments of open-centered tree form improved photosynthetically active radiation （PAR） and electron transport rate （ETR）in pear leaves in one day, and reduced non-photochemical quenching （qN） from decreasing energy and thylakoid membrane proton gradient depended quenching （qE）, which increased light use efficiency of pear leaves in orchards,

关 键 词：梨树 树形模式 叶片 叶绿素荧光 

分 类 号：S661.2[农业科学—果树学]