Analysis of structure andspecies diversity of Hierochloe glabra Trin.community in artificial grassland
[Objective]To investigate the community structure and species diversity of Hierochloe glabra Trin.in different artifi-cial grasslands in Dabutan,Guoluo Tibetan Autonomous Prefecture,Qinghai Province.[Methods]This study focuses on the species composition,importance values,and diversity indices of four different artificial grassland communities of Hierochloe glabra Trin.[Results]The results show that there are a total of 23 species of plants in the 4 communities,belonging to 15 fam-ilies and 22 genera.The dominant and co dominant species of plants in different areas are Elymus tangutorum(Nevski)Hand.-Mazz+Hierochloe glabra Trin.,Elymus tangutorum(Nevski)Hand.-Mazz.+Poa pratensis L.+Hierochloe glabra Trin.,Poa pratensis L.+Hierochloe glabra Trin.+Lagotis brachystachya Maxim.,Poa pratensis L.+Hierochloe glabra Trin.+Elymus nutans Griseb.,The Simpson diversity index,Pielou evenness index,and dominance index all show as sample plot 1 Elymus tangutorum(Nevski)Hand.-Mazz+Hierochloe glabra Trin.Community minimum,there is not much differ-ence in diversity indices among other various regions.The maximum aboveground biomass of sample plot 3 was 809.33 g/m2,with a significant increase of 10.36％,68.61％,and 52.13％compared to sample plots 1,2,and 4,respectively.[Conclusion]Therefore,the difference in dominant species is an important factor driving changes in the structure,diversity,and biomass of herbaceous plant communities.
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