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Journal of Forestry Research

, Volume 13, Issue 3, pp 209–212 | Cite as

A study on photosynthetic characteristics ofBetula platyphylla

  • Zhou Yu-mei
  • Yang Chaung-Ping
  • Wang Shu-juan
  • Wu Yue-liang
  • Wang Wen-zhang
  • Han Shi-jie
Article

Abstract

Influences of temperature, humidity, and CO2 concentration on the photosynthesis and respiration of three-year-oldBetula platyphylla was investigated. Light compensation point, saturation point and CO2 compensation point were also determined. The results showed that the optimal temperature of photosynthesis and dark respiration was 24 °C and 30 °C, respectively, at ambient CO2. When relative humidity was 80%,Betula platyphylla could maintain strong photosynthesis. There was no significant correlation between respiration and relative humidity. The light compensation and saturation point was 25 μmol·m−2·s−1 and 1 375 μmol·m−2·s−1, respectively. The CO2 compensation point was 180 μL·L−1. The results showed thatBetula platyphylla still had potential to assimilate CO2 when CO2 concentration was above 2 400 μL·L−1.

Keywords

Betula platyphylla Photosynthesis Respiration CO2 concentration 

CLC number

S792.153 Q954.11 

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Copyright information

©  0271 0304 V 2 2002

Authors and Affiliations

  • Zhou Yu-mei
    • 1
  • Yang Chaung-Ping
    • 2
  • Wang Shu-juan
    • 3
  • Wu Yue-liang
    • 4
  • Wang Wen-zhang
    • 2
  • Han Shi-jie
    • 1
  1. 1.Institute of Applied EcologyChinese Academy of SciencsesShenyangP.R. China
  2. 2.Northeast Forestry UniversityHarbinP.R. China
  3. 3.Collelge of Life ScienceJilin UniversityChangchunP.R. Chian
  4. 4.Liaoling Academy of Forestry ScienceShenyangP.R. China

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