苏州市10种行道树植物叶经济谱性状对土壤重金属污染的响应  

Responses of Leaf Economics Spectrum Traits of 10 Street Trees to Soil Heavy Metal Pollution in Suzhou

作　　者：李弘毅 张兴 曲彦婷[2] 高飞 李雨桐 张昊 Li Hongyi;Zhang Xing;Qu Yanting;Gao Fei;Li Yutong;Zhang Hao(School of Architecture and Urban Planning,Suzhou University of Science and Technology,Suzhou 215011,Jiangsu,China;Institute of Natural Resources and Ecology,Heilongjiang Academy of Science,Harbin 150040,China)

机构地区：[1]苏州科技大学建筑与城市规划学院,江苏苏州215011 [2]黑龙江省科学院自然与生态研究所,哈尔滨150040

出　　处：《中国城市林业》2023年第3期7-16,共10页Journal of Chinese Urban Forestry

基　　金：黑龙江省应用技术研究专项(GA20B402);黑龙江省科学院双提雁阵项目(STYZ2022ZR01)。

摘　　要：为探究植物叶经济谱性状对城市道路不同梯度土壤重金属污染的响应,选取苏州市不同功能区道路,调查土壤重金属含量及10种典型行道树的叶经济谱性状。结果表明:行道树植物通过减少比叶面积、增加叶氮含量、调节叶片碳氮比的方式增加叶片韧性作为在重金属胁迫环境下的适应对策,10个叶经济谱性状间普遍存在显著相关关系且性状间关系受环境变化影响不明显,气孔导度、蒸腾速率、叶片碳氮比、叶氮含量、净光合速率、叶绿素含量、比叶面积、叶面积、叶碳含量是评价植物对重金属污染环境适应性的重要指标。10种植物中,香樟、银杏和红花檵木对土壤重金属污染环境具有较好适应性,鸡爪槭、南天竹和野迎春适应能力较弱,金边黄杨、红叶石楠、桂花和锦绣杜鹃环境适应性则适中。To investigate the response of plant leaf economic spectrum traits to soil heavy metal pollution at different gradients on urban roads,the study selects the roads in different functional areas of Suzhou to measure the heavy metal content in soil and the leaf economic spectrum traits of 10 species of street trees.The results show that street trees increase their leaf toughness by reducing SLA,increasing Nmass,and adjusting C∶N,which is their adaptation strategies under heavy metal stress environments.There is a significant correlation between the 10 species in leaf economic spectrum traits,and the correlation between traits is not significantly affected by environmental changes.Principal component analysis shows that Gs,Tr,C∶N,Nmass,Pn,CHL,SLA,LA,and Cmass are important indicators for evaluating the adaptability of plants to heavy metal pollution environments.Among the ten species of trees,Cinnamomum camphora,Ginkgo biloba,and Loropetalum chinense var.rubrum have good adaptability to heavy metal pollution in soil,Acer palmatum,Nandina domestica and Jasminum mesnyi have weak adaptive abilities,and the environmental adaptability of Euonymus japonicus var.aurea magnatus,Photinia serratifolia,Osmanthus fragrans,and Rhododendron simsii is moderate.

关 键 词：行道树 叶经济谱 重金属 响应 苏州市 

分 类 号：X53[环境科学与工程—环境工程] S687.1[农业科学—观赏园艺]