河西走廊园林绿化树种选择及综合性能数量化评价

Synthetical Capability Quantification and Selection of Gardening Trees in Hexi of Gansu Province

树种选取是城镇实现"绿化、美化、净化、香化、彩化"和持续发展的前提,对于干旱沙区的城镇更为重要。现依据"适地适树、结构自然、突出特色、丰富多彩、功能优化"的原则,采用层次分析法综合评判和选择确定甘肃河西城镇绿化的基调树种12种、骨干树种41种、一般树种54种、边缘树种47种。基调树种中有常绿乔木2种、落叶乔木7种、落叶灌木1种,属于乡土树种的7种,外来树种近占一半;骨干树种中有常绿树种3种(乔木1种)、落叶乔木24种、落叶灌木14种,属于乡土树种的14种,外引树种占其3/4。

Tree species selection is the premise of a town in arid desert area to realize greening, beautifying, cleaning and city's sustainable development. Based on the principles of tree suitable for local condition, natural structure, outstanding features, rich and colorful, and function optimization, the 12 basic tree and shrub species, the 41 main ones, the 54 common ones and the 47 marginal alternative ones for town gardening of Hexi region in Gansu are selected by using the method of Synthetically Evaluation of Level Structure Analysis. Among the 12 ones 2 species are evergreen trees, 7 broad leave trees, 1 shrub; 7 of them from local area and nearly a half species are introduced from outside areas. Among the 41 ones there are 3 evergreen species, 24 broad leave tree species, 14 shrubs; 14 of them from local species, 3/4 from outside areas.