Abstract: In order to supply theoretical basis for the management of moso bamboo (Phyllostachys edulis) under the background of climate change, open-top chambers (OTCs) were employed to study the physiological responses of P. edulisto elevated atmospheric CO₂ concentration. Three treatments were installed,i.e., ambient 350 μmol CO₂·mol^-1 (CK), 500 μmol CO₂·mol^-1 (T₁), and 700 μmol CO₂·mol^-1 (T₂), with the leaf photosynthetic pigments, membrane lipid peroxidation, and anti-oxidation system determined. There were no significant differences in the test physiological parameters between treatments CK and T₁ in the initial 30 days, except that the CAT activity in treatment T₁ had a significant decrease. With the increasing time of treating with 500 μmol CO₂·mol^-1, the effects on the membrane lipid peroxidation and anti-oxidation system appeared gradually, and after 90 days, the test physiological indicators except soluble sugar content changed significantly. In treatment T₂, the membrane lipid peroxidation and anti-oxidation system were more affected than in treatment T₁. In the initial 30 days, the soluble sugar content and the anti-oxidation enzyme activities changed obviously; and after 90 days, all the test physiological parameters had significant change. It was concluded that elevated atmospheric CO₂ concentration could enhance the antioxidant capacity of P. edulis to a certain extent, but the excessive accumulation of photosynthetic products could induce the carbohydrate source-pool imbalance and the feedback inhibition of Rubisco regeneration.

Key words: spatial dynamic, semivariable function, Kriging interpolation, correlation analysis.