Effect of elevated ambient CO2 concentration on water use efficiency ofPinus sylvestriformis

Han Shijie; Zhang Junhui; Wang Chenrui; Zou Chunjing; Zhou Yumei; Wang Xiaochun

doi:10.1007/BF02855456

Journal of Forestry Research ›› 1999, Vol. 10 ›› Issue (4) : 209 -210. DOI: 10.1007/BF02855456

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Effect of elevated ambient CO₂ concentration on water use efficiency ofPinus sylvestriformis

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Abstract

Pinus sylvestriformis 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 CO₂ concentration at 500±100 μL·L⁻¹ by directly injecting CO₂ into the canopy under natural condition in 1998–1999. The results showed that the elevated CO₂ concentration reduced averagely stomatal opening, stomatal conductance and stomatal density to 78%, 80% and 87% respectively, as compared to normal ambient. The elevated CO₂ reduced the transpiration and enhances the water use efficiency (WUE) of plant.

Keywords

Pinus sylvestriformis / Water Use Efficiency (WUE) / Elevated CO₂ concentration

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Han Shijie, Zhang Junhui, Wang Chenrui, Zou Chunjing, Zhou Yumei, Wang Xiaochun. Effect of elevated ambient CO₂ concentration on water use efficiency ofPinus sylvestriformis. Journal of Forestry Research, 1999, 10(4): 209-210 DOI:10.1007/BF02855456

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