Different fertilizer treatments were carried out to test their effects on mixed grassland (oat+ spring vetch) yield in Luqu, Gannan Autonomous Region, where the elevation is around 3 500 m above sea level The result of different kinds of fertilizer and different rate treatments shows that the fresh yield can be significantly increased 1667% and 981% than control by applying 15 000 kg /hm2 sheep manure and 150 kg/hm2 urea, respectively