The researchers studied different grazing systems in a desert grassland to see how they affect plant growth and relationships between different species. They found that moderate grazing intensity led to higher plant biomass compared to heavy grazing. The environment also played a big role, with fenced plots having less biomass in some conditions but more in others. Grazing reduced differences in plant growth over time, but had varied effects on differences in plant growth across the area. Heavy grazing increased competition between plant communities and caused some species to decline. Overall, a four-course grazing system with moderate intensity was found to be the best for protecting and restoring the desert grassland.