中国农业科学（英文版）2005，Vol.4Issue(4)：263-272,10.
Effects of Photosynthetically Active Radiation and Air Temperature on CO2 Uptake of Pterocarpus macrocarpus in the Open Field
Effects of Photosynthetically Active Radiation and Air Temperature on CO2 Uptake of Pterocarpus macrocarpus in the Open Field
Sureeporn Kerdkankaew 1Jesada Luangjame 2Pojanie Khummongkol3
作者信息
- 1. The Environment Program of the Joint Graduate School of Energy and Environment,King Mongkut's University of Technology Thonburi,91 Prachauthit Rd.,Thungkru,Bangkok,10140,Thailand
- 2. National Park,Wildlife and Plant Conservation Department,Phaholyothin Rd.,Chatujak,Bangkok,10900,Thailand
- 3. Division of Environmental Technology,School of Energy and Materials,King Mongkut's University of Technology Thonburi,91 Prachauthit Rd.,Thungkru,Bangkok,10140,Thailand
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摘要
Abstract
Since trees and plants can absorb CO2, forests are widely regarded as a carbon sink that may control the amount of CO2 in the atmosphere. The CO2 uptake rate of plants is affected by the plant species and environmental conditions such as photosynthetically active radiation (PAR), temperature, water and nutrient contents. PAR is the most immediate environmental control on photosynthesis while air temperature affects both photorespiration and dark respiration. In the natural condition, PAR and temperature play an important role in net CO2 uptake. The effects of PAR and air temperature on the CO2 uptake of Pterocarpus macrocarpus grown in a natural habitat were studied in the present work. Due to many uncontrollable factors, a simple rectangular hyperbola could not represent the measured data. The data were divided into groups of 2℃ intervals; CO2 uptake in each group may then be related to PAR by a rectangular hyperbola function. Using the obtained functions, the effect of PAR was removed from the original data. The PAR-independent CO2 uptake was then related to air temperature. Finally, the effects of PAR (I) and air temperature (Ta) on the CO2 uptake rate (A) were combined as:A= [(-0.0575 Ta2+ 2.6691 Ta-23.264)I/(-4.8794Ta2+227.13Ta-2456.9)+I](-0.00766Ta2+0.40666Ta-3.99924)关键词
Air temperature,CO2 uptake rate,Empirical model,Photosynthetically active radiationKey words
Air temperature,CO2 uptake rate,Empirical model,Photosynthetically active radiation引用本文复制引用
Sureeporn Kerdkankaew,Jesada Luangjame,Pojanie Khummongkol..Effects of Photosynthetically Active Radiation and Air Temperature on CO2 Uptake of Pterocarpus macrocarpus in the Open Field[J].中国农业科学（英文版）,2005,4(4):263-272,10.
