Synthetical Indexes of the Disaster of Snow Cover

By analyzing the main factors of snow damage, it is known that the snow cover burying the fodder grass is the most important disaster-causing factor, and other factors such as the depth of snow cover, a good or bad yield of grass, the physical condition and head of livestocks feeding on grass farm, the duration of snow cover are also associated with the extent of snow disaster. Therefore, a synthetical index of snow disaster is proposed.