文献类型：期刊文献

中文题名：干热河谷主要植被恢复树种干季光合光响应生理参数

英文题名：Characteristic Parameters of Light Response of Photosynthesis of Main Tree Species for Vegetation Restoration in Dry Season in Dry-Hot River Valley

作者：段爱国[1] 张建国[1] 何彩云[1] 曾艳飞[1]

第一作者：段爱国

机构：[1]中国林业科学研究院林业研究所国家林业局林木培育重点实验室

年份：2010

卷号：46

期号：3

起止页码：68-73

中文期刊名：林业科学

外文期刊名：Scientia Silvae Sinicae

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家林业局林业重点工程科技支撑项目"西南困难立地抗逆性优良乔灌木树种选择及快繁技术试验示范"

语种：中文

中文关键词：干热河谷;植被恢复;光响应曲线;表观光合量子效率;分段函数

外文关键词：dry-hot river valley; vegetation restoration; light response curve of photosynthesis; apparent quantum yield of photosynthesis; subsection function

分类号：S718.3

摘要：探讨金沙江干热河谷元谋段13种野外生长树种在干季的光合光响应曲线特征参数,得出结论:1)以光合光响应曲线上光能利用效率的下降位点来界定植物表观光合速率随光强呈线性增长的弱光区域是科学可行的;2)分段函数对供试树种光合光响应曲线具有良好的拟合性能;3)弱光区域的界定与否对表观量子效率α和暗呼吸速率Rd均产生明显影响,而对光补偿点LCP、光饱和点LSP及最大表观光合速率Pmax等3个特征参数影响不明显;4)元谋干热河谷13个树种在干季3月的表观光合量子效率、暗呼吸速率、光补偿点、光饱和点、最大净光合速率大小范围分别为0.0207～0.0592μ molCO2·m-2s-1/μ molphotons·m-2s-1,-2.07～-0.31μ molCO2·m-2s-1,14～37μ molphotons·m-2s-1,1015～1648μ molphotons·m-2s-1,3.09～19.32μmolCO2·m-2s-1;5)最大净光合速率Pmax、表观量子效率α、饱和光能利用效率SLUE3者间的树种排序十分相似,这表明树种在弱光区域及饱和光强下的光能利用效率愈高,其最大净光合效率一般亦越高。
Characteristic parameters of photosynthesis in response to irradiance of 13 naturally-regenerated tree species, which were used for vegetation restoration in the dry-hot river valley of the Jinsha River,were studied and several main conclusions were drawn. It was theoretical and feasible to determine the weak light range by the descending point of light using efficiency on light response curve. The subsection functions provided a well-fitted simulating curve for photosynthetic response to irradiance. The determination of weak light region had significant effect on apparent quantum yield of photosynthesis （α） and dark respiration rate （Rd）,however it had not obvious effect on light compensation point （LCP）, light saturation point （ LSP） and maximum apparent photosynthesis rate （ Pmax） . The variation ranges of α,Rd,LCP, LSP,Pmax of 13 tree species in dry March respectively were 0. 020 7 ～ 0. 059 2 μmol CO2·m -2 s -1 /μmolphotons·m -2 s -1, -2. 07 ～ -0. 31 μmol CO2·m -2 s -1,14 ～ 37 μmolphotons·m -2 s -1 ,1 015 ～ 1 648 μmolphotons·m -2 s -1 ,3. 09 ～ 19. 32 μmol CO2·m-2s-1. There were similar rank of the 13 species among the bases of the maximum apparent photosynthesis rate,the saturation light using efficiency and apparent quantum yield of photosynthesis,which suggested that if the tree species had a higher light using efficiency in weak light region and under the saturated light,they often had a higher maximum apparent photosynthesis rate.