通过对人工倍增CO2浓度（800±100） μmol·mol-1与正常CO2浓度（400±25） μmol·mol-1条件下短葶飞蓬植株生物量、体内灯盏乙素和总咖啡酸酯含量及产量的比较，探讨了CO2浓度升高对药用植物短葶飞蓬生物量、有效成分含量及产量的影响.结果表明：CO2浓度倍增条件下，短葶飞蓬植株生物量增加了22%；总咖啡酸酯及灯盏乙素含量分别增加23%和26%，产量分别增加37.6%和45.3%.不同器官的生物量及有效成分含量对CO2浓度升高的响应不同.在CO2浓度倍增条件下，短葶飞蓬植株含氮量减少47.2%，与次生代谢有效成分含量的变化呈反比，符合“碳素/营养平衡假说”；植株生物量与次生代谢产物含量的变化呈正相关，植株生长与次生代谢产物积累之间没有表现出权衡关系.说明合理施用CO2是可实现短葶飞蓬的优质高产.
With medicinal plant Erigeron breviscapus as test material, its biomass and the contents and yields of scutellarin and caffeate were monitored under doubled (800±100) μmol·mol-1 and natural (400±25) μmol·mol-1 CO2 concentration. Comparing with those under natural CO2 concentration, the biomass of E. breviscapus under doubled CO2 concentration increased by 22%, the contents of scutellarin and caffeate increased by 23% and 26%, and the yields of these two constituents increased by 376% and 453%, respectively. Different organs had different responses in their biomass and active constituent contents to the elevated CO2 concentration. Under doubled CO2 concentration, the plant N content decreased by 472% and was negatively correlated with active constituent contents, being accorded well to the C/N balance hypothesis, and the biomass was positively correlated with the active constituent contents while no trade-off was observed between plant growth and secondary metabolism, suggesting that rational application of CO2 could improve the yield and quality of E. breviscapus.