The experiment studied how different numbers of sheep grazing in Inner Mongolia affected plant diversity in the Artemisia frigida community. They used 5 stocking rates and monitored the area for 8 years. The results showed that as the number of sheep increased, plant diversity decreased, and certain plant species became more dominant. Heavy grazing led to a decrease in grass and a shift towards a different plant community. Overall, the abundance of certain plant species remained stable, but the diversity and evenness of the community decreased with higher stocking rates.