Analysis on grassland resources and their deterioration situation on North Slope of Qilian Mountains

The grassland monitoring data on North Slope of Qilian Mountains were used to analyze the grassland resources and their deterioration situation. The results showed that the total grassland area, usable grassland area, deteriorated grassland and the fresh grass yield were 4.33 106 hm2, 3.91106 hm2, 3.32106 hm2 and 5.651109 kg in 2008 respectively. The areas of desertification grassland, pest damaged grassland, rodent damaged grassland, poisonous grasses//weeds type grassland and salinized grassland were 2.722105 hm2, 5.838105 hm2, 4.93105 hm2, 4.25105 hm2 and 5.67104 hm2 respectively. Accordingly, the proportions of the different deteriorated grassland area to the total grassland area in research region were 6.29%, 13.55%, 11.44%, 9.86%, and 1.32%.