广西科学院学报Issue(4)：222-228,7.
巨尾桉与黧蒴栲、红锥光响应曲线的比较研究
Comparative Study on the Light Response Curve of Photosynthesis among Eucalyptus grandis × E.uro-phylla,Castanopsis fissa and Castanopsis hystrix
摘要
Abstract
[Objective]To select broad-leaf species with high photosynthetic efficiency,we ana-lyzed the light response curve of photosynthesis among Eucalyptus grandis ×E.urophylla, Castanopsis fissa and Castanopsis hystrix in the country of Lingtian,Guilin,Guangxi.[Meth-ods]The Li-6400 portable photosynthesis system was used to measure the light response curves among tree species.[Results]There was little difference in net photosynthetic rate (Pn)among species when photosynthetically active radiation(PAR)began to increase,where-as with the increase in the intensity of PAR,significant differences showed up.The Pn of different species increased and reached the highest stable point with the increase of PAR. The trend of response to PAR in transpiration rate(Tr),stomatal conductance(Gs),water use efficiency (WUE ) and CO 2 use efficiency (CUE ) were similar to that of Pn whereas intercellular CO2 density,light use efficiency showed opposite trend with Pn in response to PAR.The Pn ranged from 3.975 to 20.800μmol · m2 · s-1 among three tree species. Eucalyptus grandis × E.urophylla showed the <br> highest Pn and Castanopsis fissa the lowest.Highest light compensation point and light sat-uration point (LSP)appeared in Eucalyptus grandis ×E.urophylla and the lowest appeared in Castanopsis fissa.[Conclusion]Considering the trends of indexes responding to light, Eucalyptus grandis × E.urophylla was determined as the high light efficiency tree species and can be popularized in the areas with good water and light conditions.关键词
巨尾桉/黧蒴栲/红锥/光响应曲线/特征参数/相关性分析Key words
Eucalyptus grandis ×E.urophylla/Castanopsisfissa/Castanopsis hystrix/light response curve/characteristic parameters/correlation analysis分类
农业科技引用本文复制引用
黄雅丽,梁士楚,韦宇静,李冰,石贵玉..巨尾桉与黧蒴栲、红锥光响应曲线的比较研究[J].广西科学院学报,2014,(4):222-228,7.基金项目
广西科技重大专项（2010GXNSFD169007，桂科基1123014，桂科基11166-01，桂科基11199001）资助。 （）
