lant diversity of mixed pasture with different yearsin the Yili regions of Xinjiang

Plant diversity of mixed pasture with different years was investigated in this study. The results of this study showed that the richness index increased, diversity index and evenness index firstly decreased and then increased, and dominant index firstly increased and then decreased when pasture years increased, implying that more years benefited the growth of native quality herbage. Plant diversity in the 3years pasture was bigger than that in one year pasture, and the latter was bigger than that in 2years pasture. The diversity slightly increased and the community affinity reduced between years. The pasture community reached a temporary balance from productive stability to ecological stability.