Effect of elevated ambient CO_2 concentration on water use efficiency of Pinus sylvestriformis  

作　　者：韩士杰 张军辉 王琛瑞 邹春静 周玉梅 王晓春 

出　　处：《Journal of Forestry Research》1999年第4期209-210,共2页林业研究（英文版）

摘　　要：Pinus Syvestfiformis is an important species as an indicator of global climate changes in Changbai Mountain, China. The water use efficiency (WUE) of this species (11 -year old ) was studied on response to elevated Co, concentration at 500±μLL' L-1 by directly injecting CO2 into the canopy under natural condition in 1998-1999. The results showed that the elevated Co, concentration reduced averagely stomatal opening, stomatal conductance and stomatal density to 78%, 80% and 87% respectively, as compared to normal ambient. The elevated Co, reduced the transpiration and enhances the water use efficiency (WUE) of plant.Pinus Syvestfiformis is an important species as an indicator of global climate changes in Changbai Mountain, China. The water use efficiency (WUE) of this species (11 -year old ) was studied on response to elevated Co, concentration at 500±μLL' L-1 by directly injecting CO2 into the canopy under natural condition in 1998-1999. The results showed that the elevated Co, concentration reduced averagely stomatal opening, stomatal conductance and stomatal density to 78%, 80% and 87% respectively, as compared to normal ambient. The elevated Co, reduced the transpiration and enhances the water use efficiency (WUE) of plant.

关 键 词：Pinus sylvestriformis Water Use Efficiency (WUE) Elevated CO_2 concentration 

分 类 号：S718[农业科学—林学]