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红榉光合及水分生理生态特性
引用本文:王旭军,肖正军,吴际友,唐水红,陈瑞,程勇,朱树长.红榉光合及水分生理生态特性[J].湖南林业科技,2012,39(4):29-33.
作者姓名:王旭军  肖正军  吴际友  唐水红  陈瑞  程勇  朱树长
作者单位:1. 湖南省林业科学院,湖南长沙,410004
2. 益阳市林业局,湖南益阳,413000
基金项目:国家“十二五”科技支撑项目(2011BAD38B03); 国家林业局948项目(2008—4—23); 国家林业公益性行业科研专项(200904011)
摘    要:研究了红榉在不同光合有效辐射(PAR)强度及不同CO2浓度(CCO2)范围内叶片光合及水分生理生态参数的变化特征。结果表明:①当大气CO2浓度为400μmol/mol时,红榉叶片净光合速率(Pn)与光合有效辐射(PAR)之间回归方程为Pn=-9×10-6PAR2+0.021 2PAR+0.592,光饱和点、补偿点及表观量子效率分别为1 177.8μmol/(m2.s)、20.0μmol/(m2.s)、0.034 5 mol/mol;叶片蒸腾速率(Tr)与PAR间回归方程:Tr=0.002 5PAR+4.535(R2=0.816 9,n=48);叶片水分利用效率(WUE)和PAR之间的回归方程:WUE=-2×10-6PAR2+0.003 3PAR+0.193 9(R2=0.822 2,n=48);②1 200μmol/(m2.s)PAR条件下,Pn与CCO2之间回归方程为Pn=-2×10-5C2CO2+0.062 1CCO2-5.501 8(R2=0.936,n=48),CO2饱和点、补偿点、羧化速率分别为1 552.5μmol/mol、84.8μmol/mol、0.040 3 mol/(m2.s);Tr随CCO2增强基本保持稳定不变;WUE与CCO2之间回归方程为:WUE=-3×10-6C2CO2+0.010 5 CCO2-0.944 2(R2=0.894 1,n=48)。

关 键 词:红榉  光合  蒸腾  水分利用效率

Characteristics of photosynthesis and water physio-ecology of Zelkova schneideriana
WANG Xujun , XIAO Zhengjun , WU Jiyou , TANG Shuihong , CHEN Rui , CHENG Yong , ZHU Shuchang.Characteristics of photosynthesis and water physio-ecology of Zelkova schneideriana[J].Hunan Forestry Science & Technology,2012,39(4):29-33.
Authors:WANG Xujun  XIAO Zhengjun  WU Jiyou  TANG Shuihong  CHEN Rui  CHENG Yong  ZHU Shuchang
Institution:1. Hunan Academy of Forestry, Changsha 410004, China; 2. Forestry Bureau of Yiyang City, Yiyang 413000, China)
Abstract:Under the condition of the different intensities of photosynthesis active radiation (PAR) and different ranges of CO2 contents ( Cco2 ), the characteristics of leaf photosynthesis and water physio-ecology of Zelkova schneideriana were studied. The results showed as following: (1) Under the condition of 400μmol/mol CO2, the regression equation between net photosynthesis rate (Pn) and PAR was Pn = -9× 10 -6PAR2 +0. 021 2PAR + 0. 592 ; the light saturation point ( LSP), light compensation point (LCP) and apparent
Keywords:Zelkova 'schneideriana  photosynthesis  transpiration  water utilization efficiency
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