四个催花牡丹品种复壮栽培后光合特性比较  

Comparative Studies on Photosynthetic Characteristics of Four Rejuvenation Growth Tree Peony Cultivars

作　　者：石颜通[1] 张秀新[1] 薛璟祺[1] 张盈[1] 

机构地区：[1]中国农业科学院蔬菜花卉研究所,北京100081

出　　处：《华北农学报》2013年第S1期172-176,共5页Acta Agriculturae Boreali-Sinica

基　　金：公益性行业科研专项(201203071);北京园林绿化局项目(YLHH2010002-03);农业部园艺作物生物学与种质创制重点实验室项目

摘　　要：为探明催花牡丹复壮栽培后植株生长状况,采用Li-6400光合作用分析仪对盆栽的4个常见春节催花牡丹品种催花复壮后的光合特性进行比较研究。结果表明:在春季自然花期,4个牡丹品种净光合速率(Pn)日变化呈单峰曲线,峰值出现在11:00左右,峰值最高的银红巧对比峰值最低的紫二乔高出44.39%;4个品种引起Pn降低的原因不完全相同,乌龙捧盛和百园红霞Pn降低的主要原因是气孔因素,紫二乔和银红巧对Pn降低则是气孔因素和非气孔因素共同作用的结果;4个品种的光饱和点(LSP)、光补偿点(LCP)、表观量子效率(AQY)品种间差异显著,紫二乔表观量子效率(AQY)为0.020 3,显著低于其他3个品种,能更好地利用弱光。Photosynthetic characteristics of four rejuvenation-grown tree peony were studied comparatived with the LI-6400 portable photosynthetic analysis system before flower blossom .The result were as follows:Diurnal varia-tion of net photosynthetic rate ( Pn) in leaves of the four cultivars appeared a single-peak curve which occurring at a-bout 11:00,and Paeonia suffruticosa Zierqiao has a lower Pn than Paeonia suffruticosa Yinhongqiaodui ,which Pn was 10.52 μmol/(m2· s).There were different reasons for the decrease of four cultivars ,Pn:the main reason for Paeonia suffruticosa Wulongpengsheng and Paeonia suffruticosa Baiyuanhongxia was stomatal factor ,while a combi-nation of stomatal and non-stomatal factors caused the decrease of Pn in Paeonia suffruticosa Zierqiao and tree peony Paeonia suffruticosa Yinhongqiaodui.There was a significant difference in light saturation point (LSP),light com-pensation point(LCP)and appaent quantum yield(AQY) of the four cultivars.With the highest LSP and LCP,tree peony Zierqiao was 0 .020 3 mol/mol in AQY which was significantly lower than others ,showing a better adaptation to the weak light .

关 键 词：牡丹 复壮栽培 光合特性 

分 类 号：S685.11[农业科学—观赏园艺]