围栏封育对退化草地群落功能群的影响

摘要

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.%研究围栏封育后退化草地群落功能群的变化.在达日县典型的中度退化的嵩草草甸上建立试验样地,并进行了连续3年的观测.结果显示:随着封育年限的增加,群落盖度、多样性及生物量均在增加,其中禾本科功能群生物量增加最快,莎草科功能群次之,豆科功能群增加缓慢,而杂类草功能群生物量却逐年减少.