层次分析法在粤北高速公路沿线绿化树种选择中的运用

以广东省仁化至博罗高速公路(仁化至新丰段路)为例，通过对该路段沿线乡土植物调查，运用层次分析法(AHP)对388种乡土植物的环境适应性、培植特性、功能特性和经济效应进行评价和综合分析。结果表明，在一级指标中，环境适应性权重最大(0.5476)；其次是功能特性(0.2051)。在选取的14个二级指标中, 耐贫瘠权重最大(0.1642)，耐旱能力和耐寒性的权重相对也比较大，分别为0.1533、0.0916。根据AHP模型，对所调查的388种乡土植物进行评价，其中评分80分以上适宜高速公路绿化的有64种。结合观赏性、耐寒性评价和市场苗木供应情况最终筛选出20种乡土植物作为仁新高速沿线绿化的建议树种。

The Application of Analytic Hierarchy Process on Choice of Greening Tree Species along Expressway in North of Guangdong Province

Based on investigation of native plants along Renhua to Boluo proposed expressway (Renhua to Xinfeng part) in Guangdong Province, the environment adaption, cultivation characteristic, function characteristic and economic effect of 388 native species were evaluated and comprehensively analyzed with by analytic hierarchy process. The results showed that among first-grade indexes, weight of environment adaption was the highest (0.5476) which indicated the environment adaption take the most important role in greening tree species selection along expressway, while the function characteristic (0.2051) was the second factor that should be considered. Among the 14 second-grade indexes, tolerance to barren soil was the highest (0.1642). All these were decided by special soil environment, temperature and afforested maintenance and important indexes affecting the comprehensive system of greening tree species along expressway. According to AHP model, 388 native species distributed along Renhua to Boluo expressway (Renhua to Xinfeng part) in Guangdong Province were evaluated and finally found that there were 64 species presenting well with marked up to 80 and adapting to expressway greening. Combined with ornamental value, cold tolerance and supply situation in market, 20 native species were finally selected as advising greening trees applied along Renxin expressway.