Impact of mowing on plant regrowth under different resource conditions
不同资源条件下刈割对植物再生能力的影响

10 common species of subalpine meadow communities in Gannan Province were selected as experimental materials to analyze the impact of grazing on plants at different growth stages under different field resource conditions of fertilization through simulated mowing experiment. The results show positive correlation between plant palatability and compensation ability. Elymus nutans,Avena sativa, Astragalus polycladus and Kobresia humilis exhibit a relatively lower biomass compensation capacity in high resource conditions than in low resource conditions. Medicago rythenica, Polygonum viviparvum, Festuca sinensis, Swertis bimaculata, Taraxacum tibetanum and Ajania tenuifolia exhibit the reverse response. F. sinensi, A. tenuifolia and P. viviparvum exhibit a relatively high reproductive compensation ability under high resource conditions while the reverse is true for the other seven plant species. The comprehensive compensation index analysis presents the biomass compensation ability order of the 10 plant species under fertilized/non-fertilized conditions is the same as that for biomass standing. This indicates that the comprehensive compensation index adequately reflects plant recovery potential. It then implies that evolutionary strategy is the most dominant factor affecting plant recovery, whereas comprehensive compensation index is a useful tool for predicting the effect of grazing on plant community dynamics.