Abstract: By using open-top chamber (OTC), the short-term effects of simulated warming on the reproductive phenology and growth of two perennial herbaceous species Allium xichuanense and Anemone rivularis in subalpine timberline ecotone of Western Sichuan were investigated. The results showed that warming made the dates of initial flowering, maximum flowering, and bud- shooting advanced obviously, and prolonged the duration of flowering and increased the blossoming rate. Warming also advanced the fruit phenology of A. rivularis and promoted the growth of A. xichuanense and A.rivularis. However, no significant effects were observed on the plant height and organ biomass by the end of growth season. It is suggested that A.xichuanense and A. rivularis had stronger plasticity in response to simulated warming, and could easily adapt to the intending global warming.

Key words: Alternaria azukiae, Trifolium repens, Physiological metabolism, Enzyme activity