Domestic study of Picrorhiza scrophulariiflora Pennell at different elevation

Through the domestic study of wild Picrorhiza scrophulariiflora Pennell at different elevation,the results showed that scrophulariiflora could grow normally at the elevation from 2800 to 3200 m,but the most suitable cultivating range was 2800-3000 m at which the rhizomes output of cultivated scrophulariiflora could grow eight times over wild scrophulariiflora.