高速公路边坡三种植被恢复模式的生态效果评估

边坡的生态恢复是高速公路建设的重要组成部分,但如何恢复却有诸多争论。归纳起来,我国高速公路主要有3种植被恢复模式:单纯植草、灌草结合、乔灌草结合。选取了3种植被恢复模式的代表性公路进行植被调查,进而评估生态恢复效果,结果表明:思小高速公路乔灌草结合的恢复模式较其他高速公路单纯植草和灌草结合的植被恢复模式具有更好的生态恢复效果,它具有更丰富的群落结构和物种多样性,并能够更有效地阻止外来物种入侵,在高速公路边坡的生态恢复中应予大力倡导应用。

Evaluation on Ecological Effect of the Three Modes of Vegetation Rehabilitation Conducted on Freeway Slopes

Ecologic rehabilitation of slopes is an important component part of freeway construction,but,it has quite a lot of arguments on how to rehabilitate.To sum up,there are three main types of vegetation rehabilitation in China freeways: grass alone;combination of shrub and grass;combination of arbor,shrub and grass.It conducts survey through selecting a representative freeway with the three modes and evaluates the effect of ecological rehabilitation.The outcomes show that comparing with the modes of grass alone and combination of shrub and grass adopted by other freeways,the Si-Xiao Freeway which adopts the mode of combination of arbor,shrub and grass has better effect of ecological rehabilitation.It has more abundant community structure and diversity of species and can more effectively prevent intrusion of foreign species.It should initiate and apply energetically in ecological rehabilitation of slopes of freeway.