The results showed that the important value of Setaria viridis was the largest in 5a, 10a and natural communities, while Euphorbia humifusa was predominant in 21 a community;

• 结果表明：在5年，10年和天然锦鸡儿群落中狗尾草的重要值最大，而在21年锦鸡儿群落中地锦占优势地位；