Study on Health Status of Xilinguole Grassland.

Using ground location data of meadow steppe,dry steppe,desert eteppe in early stage of twenty-first century and midterm of twenty century the dynamic changing of basic conditions about Xilinguole grassland through biomass of additive,reductive and intrusive species was analyzed.The results indicated that health status of grassland become more and more worse in last twenty years and different grassland types have different health status as follows: Leymus chinensis+Stipa baicalensis grassland type is in excellent situation,Stipa krylovii+Cleistogenes squrrosa grassland type is in fine situation,Artemisia frigida+Stipa krylovii grassland type is in good situation and Stipa klemenzii+Clestogenes songgorica grassland type is in middle situation.