【作者】 姜海凤；

【导师】 毛子军；

【作者基本信息】 东北林业大学 ， 植物学， 2003， 硕士

【摘要】 本文采用Li-6400便携式光合分析系统，对长白落叶松（Larix.olgensis Herry.）、日本落叶松（Larix.kaempferi Carr.）、兴安落叶松（Larix gmelini Rupr.）三种不同的落叶松盆栽幼苗在自然条件下的各项光合蒸腾生理指标进行了全年生长季的跟踪监测，同时在生长箱内高浓度CO₂、弱光和对照条件下考察了CO₂浓度升高和弱光处理对不同落叶松的光合作用、呼吸作用和蒸腾作用的影响。结果表明：（1）日本落叶松在整个生长季节中具有最大光合能力和水分利用效率，日本落叶松也具有最大的日同化量和蒸腾效率。（2）CO₂处理条件下三种落叶松的蒸腾速率都表现为下降，光合速率和水分利用效率都有所增加，其中日本落叶松增长的幅度最大。（3）弱光处理下，三种落叶松的蒸腾速率都下降，光饱和光合速率除兴安落叶松外也都发生了下降，但是日本落叶松的光饱和光合速率仍旧要大于另外两种落叶松。更多还原

【Abstract】 In this study, we examined all kinds of physiological ecology parameters of three different Larix (L. kaempferi Rupr., L. gmelini Carr., L. olgensis Herry. )during the whole growing season with international advanced portable photosynthetic measuring system. We also measured the effect of elevated CO2 concentration and weak light on their photosynthesis, respiration and transpiration. Results showed that:(1)The photosynthetic ability and water use efficiency of L. kaempferi is larger than the other two species during the whole growing season, it also showed that the L. kaempferi has the largest diurnal assimilation quantity and transpiration efficiency of the three species.(2)The transpiration rate of all the species decreased while the photosynthetic rate and water use efficiency increased under the double CO, concentration and all the parameters of L. kaempferi altered most.(3)The light saturated photosynthetic rate decreased besides L. gmelini, and the transpiration rate decreased in all the species under weak light but L. kaempferi still keep the largest light saturated photosynthetic rate.更多还原