|
|
|
| Comparative study on plant disposition pattern in the early stage of vegetation restoration of rock slope of highway |
| Wang Yingyu1,Song Guilong2,Qiao Lingxin3,Meng Qiang4,Han Liebao2 |
| 1.Beijing Jingshi Landscaping Co.,Ltd.,102600,Beijing；2.Institute of Turfgrass Science of Beijing Forestry University,100083,Beijing；3.Pratacultural Collegef Gansu Agricultural University, 730070,Lanzhou；4.Research Institute of Highway, Ministry of Communications,100085, Beijing：China |
|
|
|
|
Abstract Based on vegetation restoration engineering along Beijing-Chengde Highway(third period),two patterns of plant disposition in early stage of vegetation restoration were discussed，they are grass-legume pattern and shrub-grass pattern. The results showed that vegetation coverage of the plant community formed in early stage of vegetation restoration with shrub-grass pattern increased gradually,and muhi-storey structure appeared distinctly. However, vegetation coverage with grass-legume pattern in early stage increased rapidly, and reached the peak value in three months after seeding, and then fall down. In grass-legume community, the height of grass of gramineae increased more rapidly than that of legume,and reached also the peak value in three months after seeding.The grass had inhibiting effect on legume. In shrub-grass community, different species of plants grew steadily in earlier two month.Subsequently, the height of Dendranthema indicum grew more rapidly than other plants in community and consequently inhibited the growth of these plants.The order of average heights of plants in shrub-grass community is Dendranthema indicum > Amorpha fruticosa L.> Astragalus adsurgens Pall > Medicago sativa L > Festuca anmundinacea > Lespedeza bicolor Turcz.In July and August, which is two months after seedling emergence, wild plants showed competitive advantage in shrub-grass community. Species of wild plant in shrub-grass community is more than that in grass-legume community. The invasion of wild plants is helpful for the vegetation restoration in the early stage. The effect of two patterns of plant disposition showed distinct difference in early stage of vegetation restoration.
|
|
Received: 01 September 2009
|
|
|
|
|
|
|
