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Position: Home > Articles > Photosynthesis and Transpiration Characteristics of Sterculia nobililis Seedlings in Guangxi Tropical Karst Area Journal of Anhui Agricultural Sciences 2011,39 (13) 203-204+258

广西热带岩溶区苹婆幼树光合蒸腾特性研究

作  者:
朱宏光;农友;苏建苗;王家妍;李燕群;刘正富;赵金龙;林建勇;温远光
单  位:
中国林业科学研究院热带林业实验中心;广西大学林学院
关键词:
苹婆;净光合速率;蒸腾速率;气孔导度;水分利用效率;岩溶地区
摘  要:
[目的]探讨北热带岩溶区主要树种苹婆幼树的光合蒸腾特性。[方法]利用1年生苹婆实生苗,经盆栽和控水试验,研究其净光合速率、蒸腾速率、气孔导度、胞间CO2浓度、水分利用效率等的变化。[结果]长期干旱胁迫和正常供水的苹婆幼树,其净光合速率、蒸腾速率、气孔导度、水分利用效率有极显著差异,干旱胁迫将导致净光合速率、蒸腾速率和气孔导度显著降低,而水分利用效率有所提高。[结论]苹婆属于光合速率、蒸腾速率和水分利用效率较低的树种。
译  名:
Photosynthesis and Transpiration Characteristics of Sterculia nobililis Seedlings in Guangxi Tropical Karst Area
作  者:
ZHU Hong-guang et al(Forestry College,Guangxi University,Nanning,Guangxi 530004)
关键词:
Sterculia nobililis;Net photosynthesis rate;Transpiration rate;Stomata conduct;Water use efficiency;Karst areas
摘  要:
[Objective] The aim of this paper was to study the photosynthesis and transpiration characteristics of S.nobililis seedlings under different water conditions.[Method] The effect of water stress on the net photosynthesis rate,transpiration rate,stomata conduct,intercellular carbon dioxide concentration and water use efficiency of 1-year old seedlings of S.nobililis was studied by pot experiment.[Result] There were significant difference in net photosynthesis rate,transpiration rate,stomata conduct and water use efficiency of the S.nobililis seedlings under pot experiment of different water conditions.The condition of long-term water stress generated the decreasing ofthe net photosynthesis rate,transpiration rate,stomata conduct of seedlings obviously,whereas increasing the water use efficiency.[Conclusion] The S.nobililis belong to a tree of lower photosynthesis rate,transpiration rate and water use efficiency.

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