Effects of high concentration CO2 on lily growth and its two allelochemicals
高浓度二氧化碳对百合生长和两种化感物质的影响

Under greenhouse condition, this paper studied the effects of different concentrations CO2 to the growth of oriental yellow poly-bud cut lily and to the two allelochemicals in lily leaves. The results showed that the optimum CO2 concentration for Pn was 600 micromol x mol(-1). There was less impact on photosynthesis when continually supplying 600-1000 micromol x mol(-1) CO2 for 45 days, probably due to the photosynthesis adaptability of new bulblets. 600 micromol x mol(-1) CO2 could increase the stem height about 0.57 grades, and also had a positive effect on the growth of color bud. 600 micromol x mol(-1) and 800 micromol x mol(-1) CO2 could markedly increase the contents of polyphenols and flavonoids in lily leaves, and there was no plant leaves withered, because the appropriate concentrations CO2 was beneficial to the Pn and to the formation and transformation of carbohydrates and allelochemicals, which increased the premunition of the plant. The contents of polyphenols and flavonoids in lily leaves reached the maximum when the concentration of CO2 was 600 micromol x mol(-1).