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王轶浩, 罗韧. 高温环境下三峡库区引进树种水紫树(Nyssa aquatic)的光响应[J]. 四川林业科技, 2013, 34(4): 10-13. DOI: 10.16779/j.cnki.1003-5508.2013.04.003
引用本文: 王轶浩, 罗韧. 高温环境下三峡库区引进树种水紫树(Nyssa aquatic)的光响应[J]. 四川林业科技, 2013, 34(4): 10-13. DOI: 10.16779/j.cnki.1003-5508.2013.04.003
WANG Yi-hao, LUO Ren. Light-response of an Introduced Tree Species (Nyssa aquatic) under the Environment of High Temperature in Three Gorges Reservoir Region[J]. Journal of Sichuan Forestry Science and Technology, 2013, 34(4): 10-13. DOI: 10.16779/j.cnki.1003-5508.2013.04.003
Citation: WANG Yi-hao, LUO Ren. Light-response of an Introduced Tree Species (Nyssa aquatic) under the Environment of High Temperature in Three Gorges Reservoir Region[J]. Journal of Sichuan Forestry Science and Technology, 2013, 34(4): 10-13. DOI: 10.16779/j.cnki.1003-5508.2013.04.003

高温环境下三峡库区引进树种水紫树(Nyssa aquatic)的光响应

Light-response of an Introduced Tree Species (Nyssa aquatic) under the Environment of High Temperature in Three Gorges Reservoir Region

  • 摘要: 2012年8月,在35℃高温环境下采用Li-6400便携式光合测定仪对三峡库区引进树种(水紫树)的光响应特征进行测定。结果表明:水紫树的净光合速率、蒸腾速率、气孔导度和CO2利用率均随光合有效辐射增加而先快速再缓慢增加、然后略有下降;光能利用率则随光合有效辐射增加而减小;最大净光合速率为6.587 μmol/(m2 ·s)、表观量子效率为0.077 mol/mol、光补偿点和光饱和点分别为16.69 μmol/(m2 ·s)和481.82 μmol/(m2 ·s)。说明引进树种水紫树对三峡库区的夏季高温环境条件有较强的适应性,并且具有较强的耐阴性,可见其能较好的适应三峡库区的生态环境。

     

    Abstract: Light-response characteristics of an introduced tree species (Nyssa aquatic) under the environment of high temperature (35℃) in Three Gorges Reservoir Region was measured by using a Li-6400 portable photosynthesis system in August of 2012. The results showed that net photosynthetic rate,transpiration rate,stomatal conductance and CO2 use efficiency of Nyssa aquatic increased firstly,then a little slowed down with photosynthetic active radiation increasing,but light use efficiency decreased with photosynthetic active radiation increasing; The maximum net photosynthetic rate was 6.587 μmol/(m2·s) and the view of the quantum efficiency was 0.077 mol/mol; Its light compensation point and light saturation point were 16.69 μmol/(m2·s) and 481.82 μmol/(m2·s) respectively. It indicated that Nyssa aquatic had a stronger adaptation for the environment of high temperature in summer in Three Gorges Reservoir Region,and had stronger shade tolerance, so Nyssa aquatic introduced could better adapt for the ecological environment of Three Gorges Reservoir Region.

     

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