Approach of healthy evaluation and standards of Stipa bungeana steppe in Ningxia

The outwards radial survey from centre regions were used to evaluate the health status of Stipa bungeana steppe by rangelang condition and fuzzy comprehensive evaluation in the Grassland Nature Reserve of Guyuan Yunwu Mountain of Ningxia province, and then this study proposed the health assessment standard system using the result of healthy evaluation. The results of this study showed that the grasslands of Yunwu Mountain, Yueliang Mountain and Nanhua Mountain were well health, and those of Yuanzhou, Pengyang, Longde, Xiji, and Yanchi County were subhealth, and those of Haiyuan and Tongxin County were unhealthy according to evaluation results from range condition methods. Based on the evaluation results from the fuzzy comprehensive evaluation method, the grasslands of Yunwu Mountain，Yueliang Mountain and Nanhua Mountain were well healthy, and those of Yuanzhou, Pengyang, Longde, Xiji and Yanchi County were sub healthy, and those of Haiyuan and Tongxin was unhealthy. This study proposed that the health assessment standard system of S.bungeana Steppes in the Ningxia included well healthy, sub healthy and unhealthy.