Assessment method of grassland loss from drought damage in Inner Mongolia

The data of precipitation and herbage from monitoring stations in the Inner Mongolia was used to assess the grassland loss from drought damage from reduction of grassland yield and animal products and input funds of drought disaster relief. The results of this study showed the grassland yield was closely related to precipitation, and their correlation coefficient was 0.728. Optimal simulation model was established between grassland yield of different month for each grassland type and precipitation. Drought was graded by using percentage of precipitation anomaly and the relationship between drought grades and livestock loss was determined in this study, which quantitatively assessed the directly economic loss of grassland caused by drought. Assessment model fitted with growth rhythm and animal husbandry characteristics, and the case assessment was in accord with actual loss of animal husbandry caused by drought, implying that this model was able to assess the loss of grassland animal husbandry caused by drought.