The effects of different rotational grazing time on the main plant population characteristics of desert steppe were investigated in this experiment. The main results were shown as follows: the height of Stipa breviflora in late grazing plot was more superior than that in early plot, and the coverage and density of Alliumpoly rrhizum presented an obvious advantage.

The effects of the different clipping time and height on the yield and quality of forage in the meadow grassland were investigated in this experiment. The results showed that the total yield of forage clipped on August 1st and kept the clipped height 5㎝ was high. The contents of crude protein and the phosphorus of forage were the highest on August 1st, with 9.66% and 0.13% respectively. The content of crude protein and the crude fat of forage kept the stubble height of 7㎝ were high, with 8.21% and 4.23% respectively. The crude fiber content of forage (24.85%) kept the clipping height of 3㎝ was high.