海滨城市道路绿化树种综合评价体系构建

目的]对树种进行综合评价可以为自然条件复杂的海滨城市道路绿化和廊道生态系统构建提供科学参考.方法]以连云港市为例,对道路绿化常见的55个树种进行科学监测、调查和分析,采用层次分析法,设置5个一级指标:生态性、景观性、适应性、经济性和负面性,在此基础上设置30个二级指标,对各指标进行量化打分,确定各评价指标的权重值和...

Construction of a comprehensive assessment system for road greening tree species in coastal cities

【Objective】Comprehensive assessment of tree species can provide scientific references for road greening and gallery ecosystem construction in coastal cities with complex natural conditions.【Method】Lianyungang City was chosen as the case study. Fifty-five commonly seen tree species were scientifically monitored, surveyed and analyzed. The analytic hierarchy process(AHP) was adopted, and five Level-Ⅰ indexes were designed, including the ecological indexes, landscape indexes, adaptability indexes, economic indexes and negative consequences. On this basis, 30 Level-Ⅱ indexes were put forward and quantitatively marked. The weights and assignments of each assessment index were identified. Subsequently, a comprehensive assessment system for road greening tree species in coastal cities was developed. The assessment system is used to clarify the strengths and weaknesses of tree species in practical situations. The tree species were graded according to final scores.【Result】 In terms of ecological indexes, the weight of overshadow and cooling performance was the highest(0.513 7). In terms of landscape indexes, the weight of leaf color, leaf amount and flower were the highest(0.181 8). In terms of adaptability indexes, the weight of resistance against wind, plant diseases, insect diseases, and salt and alkali were the highest(0.174 0). In terms of economic indexes, the weights of the seedling price and maintenance intensity at the index layer were both 0.4. In terms of negative consequences, the weight of fluffy catkin and pollen was the highest(0.6). At the criterion layer, the weight of ecological indexes, landscape indexes and adaptability was 0.3, accounting for 90% of the total;the weight of economic indexes and negative consequence was only 0.05. The assessment results suggest tree species are tall and large, with dense branches and leaves, and which are resistant to adverse conditions, scored higher.【Conclusion】Improving the ecological environment is the main greening goal of coastal cities. In choosing tree species, the authorities should increase the percentage of local tree species and promote them as backbone tree species for future road greening. At the same time, the economic performance of maintenance and management, and the negative consequences of fluffy catkin and pollen should be taken into consideration.