Modelling net photosynthetic rate of temperate dry grassland species and winter wheat at elevated air CO2 concentration

摘要

A number of C3temperate dry grassland species and winter wheat plants were grown in open top chambers either at 365 μmol mol-1(AC) or at 700 μmol mol-1(EC) air CO2concentrations. Gas exchange measurements were made at several air CO2concentrations. When measured at higher CO2concentrations, net photosynthetic rate was higher in plants grown at EC than at AC. The widely accepted Farquhar net photosynthesis model was parameterized and tested using several observed data. After parameterization the test results corresponded satisfactorily with observed values under several environmental conditions.