摘要
Due to the special geographical conditions of Tibet,the plant species applied in local landscaping have been limited.In the landscaping project of Fujian Park,59 woody landscape plant species were introduced from the hinterland,and the survival rate and growth vigor of these species had been observed for 15 years.In terms of growth vigor and ornamental character,about 32 species showed good performance such as Prunus cerasifera f.atropuipurea and Dendrobenthemia japonica;8 species showed moderate growth performance such as Metasequoia glyptostroboides Hu et Cheng and Magnolia denudata Desr.;14 species showed poor growth vigor such as Ginkgo biloba L.and Osmanthus fragrans Lour.,and 5 species died such as Albizzia julibnssin Durazz.and Hibiscus mutabihs L..Moreover,the paper explored key factors that influence the introduction of woody landscape plants in Linzhi City and pointed out that wind damage and low temperature were 2 key factors.
To figure out current landscaping of Linzhi City, analyze the basic situation of local landscaping quantitatively, and solve related problems in landscaping, this paper applied the 'five-point sampling method' for the layered survey of landscape plant communities, investigated landscape plant species and their application in different regions of Tibet, particularly current landscaping, features and problems of Linzhi City, and put forward corresponding measures. The investigation covered 321 species(cultivars) of 196 genera, 87 families. The results showed that(1) Salix alba, Ligustrum × vicaryi, Poa pratensis had the highest importance value in the tree layer, shrub layer and herb layer, respectively, and the importance value was 68.620, 24.139 and 35.747, respectively.(2) Among all landscape plants in Linzhi City, the most applied families were Rosaceae(48), Salicaceae(21), Asteraceae(20), Leguminosae(20), Gramineae(19), Pinaceae(16), Cupressaceae(13) and Oleaceae(12), accounting for 14.95%, 6.54%, 6.23%, 6.23%, 5.92%, 4.98%, 4.05% and 3.73% of the total investigated species.(3) Natural environment of the plateau was the most influential restraint for local landscaping, and the application of landscape plants varied greatly among regions.(4) The local area was endowed with rich landscape plant resources, but these resources were not ful y developed.
