A study of fuzzy evaluation of grassland ecological security——A case of alpine grassland in Tianzhu

Ecological security as a non-traditional security was paid more and more attention to most of country in the world.Our country's ecological security situation in early 21st century is very severe,the studies related to ecological security has been already extremely urgent.This research brings up the definition of grassland ecological security,puts the emphasis on fuzzy evaluation of grassland ecological security,structures the index system of hierarchical structure of grassland ecological security evaluation and the model of fuzzy evaluation of grassland ecological security.The study takes Tianzhu Tibetan county in Gansu province as an example.The results indicate that Tianzhu alpine grassland ecological security condition is in relatively safe state as a whole.This study indicates: that using fuzzy evaluation in grassland ecological security is feasible and fitting,that offer the beneficial method reference for study of another area or ecosystem ecological security.Bringing up definition of grassland ecological security will enrich the investigative field and consummate the investigative system on ecological security.