It is very serious in natural grassland degeneration and desertification in Maqu County,the causes include both natural and anthropogenic factors,but the later especially overgrazing is the main.

• 玛曲县天然草场退化、沙化现象十分严重,其原因有自然与人为因素,而人为因素特别是超载过牧是引起天然草场退化的主要原因。