In the five steppe desert(elevation 1 360-1 380 m),because of different grazing degree and plant type,TSN content in the 0-20 cm layer changed from 0.022 8% to 0.034 7%.

• 在海拔1 360~1 380 m草原化荒漠的5个样地上；由于放牧利用程度和植被类型的不同；0~20 cm土层土壤氮的含量变幅在0.；022 8%25~0