Research progress in the ecosystem services function and value of grasslands.

Grasslands not only maintain the integrity of natural ecosystem structure and act as an ecological safety barrier,but they also play an important role in supporting animal production and in inheriting grassland culture.Ecological services function is one of the key aspects of grassland research,and its value,through quantitatively evaluating ecological services function and value of grassland ecosystem,is the key for assessing the importance of ecological services of grassland ecosystem.This paper reviews the previous research on grassland ecosystem services function and its services value,the methods for evaluating ecological services,and presents domestic and overseas study conditions in this field.On this basis,some problems in previous studies were analyzed from research method,content and scale of ecological services function and its values,and a future potential study was proposed for grassland ecosystems.