| In order to understand the growth status of Magnolia multiflora manmade plants community for ecological restoration at the
slope engineering of the expressway from Changde to Jishou, we set 30 plots to investigate M. multiflora plants community, calculated frequency of the speces and multiple degrees, and then used Shannor-Wiener index, Simpson index and Pielou index to analyze each layer.The result were as following: There were 17 kinds of species, belonging to 9 branches 17 genuses. The four species with high frequency were M.multiflora, Funaria hygrometrica, Imperata cylindrical and Robinia pscudoacacia, the frequency were 1.0, 0.9, 0.8, 0.67, respectively. The species with higher multiple degrees were F. hygrometrica, I. cylindrical, the second was M. multiflora, the third was R. pscudoacacia. Herb layer had the largest species diversity, the second was shrub layer, and then the tree layer. The Shannon-Wiener index of tree layer, shrub layer, herb layer were 0.23, 0.66, 1.4, respectively; the Pielou index were 0.08, 0.23, 0.50 respectively. In addition to a few dominant species,
the other planted previously have been dead and replaced by wild herbs. This phenomenon indicated that the previous plants could’t adapt the envioronment of expressway. In order to restore the ecology better, designers need to consider plant native species. |
