Abstract:The experiment was carried out in L. chinensis grassland of northeast China. It simulated main quantity characteristics of yield ecology, such as biomass dynamics, vertical spatial pattern of biomass as well as their relationships with environmental factors, also it studied internal relativity. The results showed that the rule of aboveground biomass growth of the grassland appeared as “single peak” type in growing season. The maximum aboveground biomass was 197.3 g ·m -2 which occured on Aug.5, then ...