关键词: 乡土地被植物, 多花胡枝子, 菊花脑, 青绿薹草, 求米草, 根系生长

Abstract:

Ground cover plants under ancient trees could protect the land from trampling and improve the permeability and water retention of soil, but the growth characteristics of root should be assessed before planting. Growth and development characteristics of shoot and root for four ground cover plants (Lespedeza floribunda, Chrysanthemum nankingense, Carex leucochlora and Oplismenus undulatifolius) under the ancient Pinus tabuliformis and P. bungeana or in the open field of Fragrant Hills Park were analyzed by Epson digital scanner and direct measurement. Significant difference was showed in the development of shoot and root of same aged L. floribunda from different habitats. The root and aerial parts from plants in the open area grew much batter than those under the ancient P. tabuliformis and P. bungeana. Chrysanthemum nankingense grew well in all three conditions, and no significant difference exhibited in the development of root and aerial parts between plants growing in different area. The development of shoot and root of O. undulatifolius was significantly superior to Chrysanthemum nankingense and Carex leucochlora grew in the same condition, and lower difference was showed in the plants of O. undulatifolius from different habitats. The results indicated that Chrysanthemum nankingense and O. undulatifolius grew well in all conditions and showed suitability for planting under ancient trees. L. floribunda was suitable for planting under ancient trees with steep site environment. Carex leucochlora was not suitable for planting as a ground cover plant under ancient trees.

Key words: native groundcover plant, Lespedeza floribunda, Chrysanthemum nankingense, Carex leucochlora, Oplismenus undulatifolius, root development