Abstract: [Objective] To define the current situation of nutritional components of grassland plant communities in East Ujimqin Banner of Inner Mongolia, to promote the sustainable development of grassland animal husbandry, and to improve the grassland ecological environment. [Method] The grassland plant communities of 10 towns in East Ujimqin Banner had been taken as the research objects in this study. The nutrient contents of the grassland plant communities were analyzed, and the differences and features of nutrient contents among grassland plant communities in different towns were characterized combining with corresponding analysis method. [Result] Minor information was extracted from common factor analysis in Uliyastai Town among the investigated towns, and the information of acid detergent fiber content in nutrients of grassland plant communities extracted from common factor analysis was also limited. The content of neutral detergent fiber was higher than 70% in the grassland plant communities of Samai Town, Gahaile Town and Daotenaoer Town; the content of crude protein was higher than 10% in the grassland plant communities of Ejinaoer Town and Alatanheli Town; the content of crude ash in the grassland plant communities of Huretunaoer Town was 10.53%; the crude protein content of the grassland plant communities in East Ujimqin Banner was decreased from west to east, while the contents of acid detergent fiber and neutral detergent fiber showed an increasing trend. [Conclusion] The variation trend of nutritional components of grassland plant community in East Ujimqin Banner from west to east is revealed by using correspondence analysis method, and the changing law of nutrient contents of the grassland plant communities in towns of East Ujimqin Banner is characterized.

Key words: East Ujimqin Banner, grassland, plant communities, nutritional components