Wind tunnel simulation and evaluation of soil conservation function of alpine grassland in Qinghai–Tibet Plateau

摘要: Abstract Aiming at studying soil conservation function of alpine grassland in the Qinghai–Tibet Plateau, this paper simulated erosion changes under different degrees human disturbance a wind tunnel laboratory. Three types grasslands were selected, which include meadow (QH-1), steppe (QH-2) and (QH-3), rate was taken as index to measure function. The experimental results show that rates three samples increase with velocity treatments but increment varied greatly. Under original status, are turn QH-1   QH-2 > QH-3. When aboveground vegetation cut, change QH-1 is same QH-3 compared status both them changed little. And when root system destroyed range economic values estimated, organic carbon fixation, nutrient retention reducing disuse.