Plant community characteristics and diversity of perennial mixed grasslands in alpine areas of the eastern Qilian Mountains
[Objective]To address the current situation of rapid degradation of artificial mixed grass-lands in alpine areas and to increase their stability.[Method]We studied eight-year-old mixed grasslands in the East Qilian Mountains.Vegetation characteristics of the different treatments,including species compo-sition and diversity indices,were measured and combined with grey correlation evaluation to select the opti-mal mixed seeding method.[Result]Plant height and total biomass of the four grass species were generally higher than those of the three grass species and the five grass species,and the total biomass of weeds was the highest among the five grass species.[Conclusion]The grey correlation analysis showed the best com-bined performance of the three species of grasses Bromus inermis Leyss.+Poa crymophila var.Qinghai+Elymus sibiricus L.Chuancao No.2.Simpson diversity index,Margalef richness index and Pielou even-ness index of the five species were the highest of all the mixed grasses.Therefore,the mixed grassland treat-ments of Bromus inermis Leyss.+Elymus nutans Griseb.+Festuca sinensis Qinghai+Poa crymophila var.Qinghai+Elymus sibiricus Qingmu No.1 can be used as establishment methods to restore the diversity of degraded grassland communities in the alpine zone of the eastern part of the Qilian Mountains.
万方数据
维普
