Effect of drought stress on the quality of grassland used for tourism in Qinghai Province

The drought resistance of grassland used for tourism in Qinghai Province was studied with linear gradient irrigation experiment by measuring the chlorophyll content, proline content and relative conductivity. The result indicated that the most suitable soil moisture content ranged from 13.66% to 23.47% and the crucial drought resistance limit was 12.01%. The drought resistance of grassland depended on the dominant species and main companion species (Carex atrofuca, Kobresia humilis,Agropyron cristatum, Poa crymophila, Taraxacum mongolicum, Potentilla anserine) and the impact of small grasses such as Ranunculus tanguticus and Trigonotis peduncularis on the drought resistance of grassland was less. The proper management suggestions were provided accordingly.