Study on the effect of plateau pika on the stability of artificial grassland established on the degraded rangeland on Qinghai-Tibet Plateau

Study on the effect of plateau pika on the stability of artificial grassland established on degraded black soil typedegrade grassland on Qinghai-Tibet Plateau was carried out and the results showed that the aboveground phytomass of high quality grass of artificial grassland damaged by pika was only 12% of non-damaged grassland while the burrow density increased to 60 per hectare and the height,cov…