Study on the Functional Groups of Degraded Grassland in Fencing

The functional groups changes of degraded grassland in fencing were studied.The test plots was established in the typical moderate degradation of the Kobresia meadow Dari county,and observed for 3 years.The results showed that community coverage,diversity and biomass were increasing by the year of fencing increased.The biomass of gramineae functional group was growing the fastest,following was the biomass of cyperaceae functional group,the biomass of leguminosae functional group increased slowly,and the biomass of forbs functional group was reduced year by year.