围封与放牧对沙地植物功能群及多样性的影响

Impacts of Enclosure on Sandy Land Plant Functional and Species Diversity

通过对沙地围栏内、外植被的生物量、盖度、密度、株高等相关指标测定,探讨围栏设置对沙地植被功能群和多样性的影响,为沙地放牧管理和合理利用提供参考.结果表明:通过围栏设置能够显著提高生物量(P<0.05),且围栏内出现了凋落物;围栏外植物种类为17种,围栏内为10种,且围栏外多样性指数和丰富度指数均显著高于围栏内(P<0.05).由此可见,在草地围封过程中适当放牧应该更有利于草地的进展演替,也将有利于退化草地的恢复.

To study the effect of enclosure on plant functional groups, species diversity and species composition by testing biomass, coverage, density and height and so on. The result showed:The biomass was significantly increase through fencing(P<0.05), and there was litter in enclosure;There are 17 species in enclosure and 10 species outside enclosure, and the diversity index and richness index of outside fence were significantly higher than enclosure (P<0.05). Thus, in the proper grazing grassland fencing in the process should be more conducive to the succession of grassland, there will also be conducive to the restoration of degraded grassland.