Abstract:Applying the principle of horizontal zone of vegetation, a research station has been chosen respectively in the typical steppe zone lied the core part of Moderate-temperate Steppe and Warm-temperate Steppe in the Steppe Biome located in the North and South Transect of China (NSCT). A comparative study has been carried out concerning the numerical structure, α-diversity, composition of plant groups of life form, leaf layer structure above ground, proportion of C 3 and C 4, and grouth dynamic characteristi...