Abstract:Under the dual influence of natural and human factors,the area of desertified grassland in Maqu has reached 5.53×104 hm2.The hazards caused by grassland desertification gradually have emerged,including decreased vegetation coverage,decreased natural grassland and grass output,weakened water conservation capacity,reduced wetland area,decreased soil erosion intensified,sharp decline in biodiversity,disrupted ecological balance,and hindered economic development.Therefore,this paper proposes a “grass irrigation combination” model to treat desertified grasslands,involving measures such as rodent control,rodent extermination,land preparation,fertilization,re-planting,and enclosure to restore desertified grasslands.Set up a grass grid model to control mobile sand dunes,and restore them through measures such as sand dune sorting,planting suitable shrubs,mixing and planting grass seeds in shrub windbreak zones,grass grid planting,sealing and grazing prohibition.The successful experimental units of two management models provide a basis and reference for the ecological restoration of grasslands in the upper reaches of the Yellow River.
