桂北中华猕猴桃光合蒸腾特性及其影响因子研究  

Photosynthetic,transpiration characteristics and its affecting factors in leaves of Actinidia chinensis

作　　者：莫凌[1] 韦兰英[1] 张中峰[1] 曾丹娟[1] 袁维圆[1] 

机构地区：[1]广西植物研究所,广西桂林541006

出　　处：《西南农业学报》2008年第4期968-971,共4页Southwest China Journal of Agricultural Sciences

基　　金：广西自然科学基金项目(桂科自0640137);中国科学院西部行动计划项目(KZCX2-XB2-08);中国科学院西部之光人才培养项目(科发人教字[2005]24号);国家科技支撑计划项目(2006BAC01A10)

摘　　要：在自然条件下,用LI-6400便携式光合测定系统测定桂北中华猕猴桃光合速率及蒸腾速率日变化情况。结果表明:净光合速率(Pn)日变化曲线为"双峰"型,光合效率午间明显降低,主要由非气孔限制引起;蒸腾速率(Tr)日变化为"单峰型",午间最高。相关分析表明,光合速率与蒸腾速率、光照强度(PAR)、气孔导度(Cond)均呈极显著正相关(P<0.01),蒸腾速率与光照强度、气孔导度、饱和气压差(Vpdl)、叶温(Tl)均呈极显著正相关(P<0.01),而光合速率与胞间CO2浓度(C i)、蒸腾速率与相对湿度(RH)均呈极显著负相关。Under natural condition,diurnal changes of photosynthetic rate （Pn） and Transpiration rate （Tr） in leaves of Actinidia chinensis were measured using L1-6400 portable photosynthesis （ LI-Cor Inc. ,USA）. The results showed that the curve of diurnal variations of Pn had two peaks,which had an obvious phenomenon of midday decline of photosynthetic efficiency. The mid-depress of Pn was principally caused by non-stomata limited elements. The curve of diurnal variation of Tr had one peak exhibiting the highest value at noon. Correlation analysis among photosynthetic parameters showed that there were significantly positive correlations between Pn and Tr,Pn, Tr and PAR,Pn, Tr and Cond, Tr and Vpdl, T/（ P 〈 0.01 ）. However, there were significantly negative correlations （ P 〈 0.01 ） between Pn and Ci, Tr and RH.

关 键 词：光合速率 蒸腾速率 相关分析 

分 类 号：S662.1[农业科学—果树学]