ABSTRACT
ABSTRACT: Ecological risk assessment is a research field that arises gradually and develops continuously in the 1990s at home. It is a new way of desertification evaluation and means of desertification quantitative research. Based on theoretical framework of ecological risk assessment, this paper has carried out desertification ecological risk assessment for different types of farmlands in Naiman Banner. Desertification ecological risk assessment model was established and desertification ecological risk values of different types of farmlands were obtained by means of field sampling and laboratory analysis. Characterization of quantitative relationship between different risk sources and desertification ecological risk values were listed in order to clarify the impacts of different risk sources on risk receptors. The assessment results showed that desertification ecological risk values of farmlands in the Naiman Banner ranking from high to low is: lump farmland without shelter forest > meadow farmland without shelter forest > lump farmland with shelter forest > meadow farmland with shelter forest. This indicated that farmlands without shelter forests are more prone to desertification disaster and possibility of desertification of lump farmland was higher than that of meadow farmland. Moreover, shelter forest could effectively reduce the desertification ecological risk of farmland and protective effects on lump farmland was higher than that of meadow farmland.
