西藏林芝市园林植物调查与应用

为了解林芝市园林绿化基本情况，解决绿化中的相关问题，采用生物五点法，通过分层调查对林芝市各地园林植物种类和应用现状进行了全面普查，详细分析了林芝市园林绿化的现状、特点及问题，提出了相应举措。共调查园林植物87科、196属、321种（含品种）。调查结果表明：（1）乔木层、灌木层、草本层重要值最高的分别为白柳、金叶女贞、草地早熟禾，其重要值分别为68.620，24.139和35.747。（2）林芝市绿化植物中，应用最多的依次为蔷薇科、杨柳科、菊科、豆科、禾本科、松科、柏科和木犀科，分别为48，21，20，20，19，16，13和12种，分别占调查植物的14.95%，6.54%，6.23%，6.23%，5.92%，4.98%，4.05%和3.73%。（3）高原自然环境条件是最大的制约因子，园林植物应用地区间差异较大。（4）园林植物资源丰富，但应用开发落后。

Investigation and application of landscape plants in Linzhi City of Tibet

To study the greening situation in Linzhi City and resolve the landscape related problems， plant species and their applications in Linzhi City were surveyed by biology\|five\|spot according to layer. The current situation and characteristics of gardening and greenspace building in Linzhi City were analyzed， the related problems were discussed， and some countermeasures were put forward correspondingly in this paper. The survey showed that the landscape plants applied in Linzhi City belonged to 321 species （including varieties）， 196 genera， and 87 families. The highest important value of arbor layer， shrub layer and herb layer individually belonged to Salix alba， Ligustrum×vicaryi， and Poa pratensis， whose important value were 68.620， 24.139， and 35.747， respectively. The most widely used landscape plants were from Rosaceae， Salicaceae， Asteraceae， Leguminosae， Gramineae， Pinaceae， Cupressaceae， and Oleaceae families， there were 48， 21， 20， 20， 19， 16， 13， and 12 species from each of the families， which accounted for 14.95%， 6.54%， 6.23%， 6.23%， 5.92%， 4.98%， 4.05% and 3.73% of the totally adopted species， respectively. The most important restriction factor was plateau natural environment. There were great differences in the landscape plant species used among different regions in Linzhi City. Linzhi City was rich in gardening plant resources， but was backward in application and development of these resources.