According to the per unit area grassland ecosystem services value and the biomass of each grassland type, the value of both the natural and artificial grassland ecosystem services in Ningxia was evaluated. As indicated by the results, ①The value of the natural grassland ecosystem services in Ningxia was RMB 80.67 × 108 in 1980, RMB 43.96 × 108 in 1997, RMB 21.22 × 108 in 2004, and RMB 16. 28 × 108 in 2005. ②The total value of natural grassland ecosystem services decreased gradually from 1980 to 2005, The ecosystem services value of temperate meadow steppe increased in 2004, that of others grassland types declined gradually. ③ The ecosystem services of artificial grassland increased gradually. ④ The economic services value accounted for a little proportion in the total ecosystem value of natural grassland, while the ecological services value was much larger. ⑤ The ecosystem services value of grassland decreased obviously from 1980 to 1997, while experienced no significant change from 2004 to 2005. The ecosystem services value of grassland decreased constantly, but was still higher than the total output value of animal husbandry of the same year.%根据草地生态系统单住面积生态服务价值表,对各草地类型生物量订正的基础上,对宁夏天然草地生态系统的服务价值进行了评估,同时也对宁夏人工草地生态系统的服务价值进行了评估.结果表明,①1980年宁夏天然草地生态系统的服务价值为80.67×10元,1997年为43.96×10元,2004和2005年分别为21.22×10和16.28×10元.②宁夏天然草地主要草地类型生态系统服务的总价值从1980-2005年逐年降低,温性草句草原的生态系统服务价值在2004年有所增加,其余草地类型的生态系统服务价值逐年降低.③宁夏人工草地的生态系统服务价值逐年增加.④宁夏天然草地生态系统服务价值中的经济服务价值所占比例非常小,生态服务价值占的比例较大.⑤1980～1997年草地生态系统服务价值明显下降,2004～2005年没有明显变化,宁夏草地的生态系统服务价值一直在下降,但都比当年的牧业总产值高.
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