The response of photosynthetic rate and stomatal conductance of oat to light intensity and CO2concentra2 tion was studied using LI26400 in Inter Mongol China. Generally,photosynthetic rate increased with light intensity (PPFD),which could be expressed by Michaelis2Menten function. The maximum photosynthetic rate (Pmax,i) was 18. 63 μ mol/ (m2· s) under natural CO2concentration. The photosynthetic rate increased with CO2concentration,which could be expressed by Michaelis2Menten function too. The maximum photosynthetic rate (Pmax,c) was 110. 28μ mol/ (m2· s) under saturated light intensity (PPFD) while [CO2] →∞. The response of stomatal conductance to light intensity could be ex2 pressed by Michaelis2Menten function too,because stomatal conductance increased with light intensity (PPFD),but the stomatal conductance will decrease with increase of CO2concentration. The stomata limitation increased with light intensity (PPFD) and CO2concentration,but when [CO2] > 200μ mol/ mol,stomata limitation kept constant.
WANG Jian lin
. Response of Photosynthetic Rate and Stomatal Conductance of Oat to Light Intensity and CO2 Concentration and Its Modeling[J]. Acta Agriculturae Boreali-Sinica, 2009
, 24(3)
: 134
-137
.
DOI: 10.7668/hbnxb.2009.03.029
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