Resumen
The frequent occurrence of poisonous grassland weed disasters has weakened the stability of the grassland ecosystem in the Ili region of Xinjiang, and its spread has seriously affected the development of grassland animal husbandry. However, there is no relevant literature to report the species and distribution of poisonous grassland weeds in the Ili region. In this study, investigation was carried out using methods such as personal inspection and sampling methods, and importance-value and diversity analyses were conducted. The results showed that there were 126 species of poisonous weeds in the Ili region, belonging to 91 genera and 28 families. The poisonous weeds of Compositae and Leguminosae accounted for 33.3%. The Shannon?Wiener diversity index of the poisonous weed population was 3.99, the richness of the poisonous weed population was high, and the distribution range was uniform. The Simpson diversity index of poisonous weeds population was 0.97, and the highest importance value of poisonous weeds was Urtica cannabina L., with an importance value of 11.50. The evenness index of the poisonous weed population was 0.83; the spatial distribution pattern of the poisonous weed population tended to aggregate distribution. This study lays a foundation for the control of poisonous weeds and the sustainable development of grasslands in the Ili region of Xinjiang.