不同草地利用方式对河北坝上天然草地植物群落特征的影响

本研究以坝上天然草地植物群落为研究对象,分析了不同草地利用方式(打草场、冬牧地、公牧地)对植物群落的数量特征、物种组成、功能群特征及物种多样性的影响.结果表明:冬牧地的群落高度、物种数及物种多样性指数均最大,打草场的群落盖度显著大于放牧地(冬牧地和公牧地)且其地上生物量与冬牧地没有显著差异,同时打草场物种多样性指数与冬...

Effects of Different Grassland Using Modes on Plant Community Characteristics on Bashang Natural Grassland,Hebei Province

In this study,the plant community in Bashang natural grassland(Hebei,China)was taken as the research objective to understand the effects of different grassland using modes(mowing meadow plot,winter pasture plot and public pasture plot)on the quantitative characteristics,species composition,functional groups and species diversity of plant community.The results showed that:the community height,number of species,and species diversity index in winter pasture were the highest;the community coverage of mowing meadow was significantly higher than that of grazing pasture(winter pasture and public pasture),and there was no significant difference in aboveground biomass between mowing meadow and winter pasture,and the difference in species diversity index between winter pasture and winter pasture was very small;and the most of the indices of plant community were the lowest in public pasture.In addition,grazing and mowing had significant impacts on community species composition and the composition of plant functional groups,and the cumulative dominance of Gramineae,the cumulative dominance and composition percentage of perennial grasses in grazing pasture were significantly higher than those in mowing meadow,whereas the cumulative dominance of perennial forbs were significantly higher in mowing meadow.In conclusion,the effect of mowing meadow on the plant community characteristics of Bashang grassland was inferior to those of winter pasture.However,the selective feeding of livestock in winter pasture wastes the production potential of grassland,therefore,the use of mowing meadow contributed to improving the sustainable utilization of natural grassland in Bashang.