A study on division of grades and warning of grassland fire

摘要

@@Introduction China is rich in grassland resource and has a variety of natural grasslands,which serve as not only the bases of stockbreeding but also the green ecological defense.But most of them distribute in arid or semiarid regions in northwestern China of arid climate with the characteristics of less of rainfall,windiness,and long period of withering.As a result,grassland fire occurs frequently,which result in a great loss for stockbreeding,people's life and grassland ecosystems.