Abstract: In this study, 89 occurrence records, 28 climatic and 6 soil factors were used to predict the potential distribution and habitat suitability of Notholirion bulbuliferum in China based on the MaxEnt modeling and geographic information system. The results showed that the highly potential distribution (suitability index >0.5) mainly located in Sichuan (Aba, Ganzi and Liangshan, with an area of 51813 km²), Yunnan (Diqing and Lijiang, 15889 km²), Shaanxi (Taibai, 16131 km²), Tibet (Nyingchi, Lhoka and Shigatse, 17748 km²) and Gansu (Longnan, 12184 km²) provinces. The AUC of ROC curve was 0.979, indicating that the predictive results with the MaxEnt model were highly precise. The main environmental factors determining the potential distribution were annual average precipitation (the contribution rate, 38%), altitude (32.1%), average monthly minimum temperature of January (7.6%), average monthly precipitation of January (6.8%) and topsoil pH (H₂O) (3.9%). The environmental variables in the highly potential areas were determined as annual average precipitation around 870 mm, altitude around 2550 m, average monthly minimum temperature of January around -6.3 ℃, average monthly precipitation of January around 5.3 mm and topsoil pH (H₂O) around 6.77. The results will provide valuable references for wild resource conservation, plantation regionalization and standard cultivation of N. bulbuliferum in highly suitable areas.

Key words: Festuca arundinace, subcellular structure, antioxidant, biomass