沙地不同治理模式对其植物物种多样性的影响

Effects of Different Controlling Modes on Species Diversity of Plant in Sandy Land

根据样地调查资料,采用丰富度指数、物种多样性指数和均匀度指数对杜蒙沙地不同治理模式植物群落的多样性进行了研究,结果表明:(1)杜蒙沙地不同治理模式下共有26种植物出现,隶属11科,其中禾本科植物是群落优势物种。(2)沙地人工群落的优势种主要为小叶锦鸡儿和花棒等灌木种,表现良好,且群落植物种类也较未播种灌木治理模式丰富。(3)通过多样性指数比较,得出小叶锦鸡儿(播种)+樟子松固沙林治理模式和花棒(播种)+封育治理模式下植物群落的多样性指数最高,是比较理想的沙地治理模式。

Based on the data investigated from the field,richness index,species diversity indices and evenness indices were used to analyze the vegetation in sandyland of Duerbert Mongolian Autonomous County.Result shows that:①There are 11 family,26 species in the studied area,among with the plant of Gramineae play dominant role in the pant composition.②After the application of forestry managements,the dominant species in the sands were artificially bushes like Caragana microphylla&Hedysarum scoparium.The artificial shrub species presents perfect growing status,and the species richness is superior to that exclosure without planting.③Comparing the species diversity index show as:Caragana microphylla(sowing)+Pinus sylvestris var.mongolica plantation pattern and Hedysarum scoparium(sowing)+expression pattern,which are significantly higher than other types of vegetation restoration,is the ideal vegetation planting pattern in sandy land.