石湖园林植物LES性状对水分环境响应的研究

Study on response of leaf economic spectrum traits of Shihu garden plants to water environment

园林植物作为城市绿化主要参与者维护城市生态与环境系统健康与稳定。而园林植物选择往往遵循经验或主观意见,缺乏科学基础理论支撑。叶经济谱作为一种植物资源权衡策略(Trade-off)量化指标,反映植物对外界环境变化响应和植物表现型性状之间关联,可应对不同环境因素时选择合适的植物种类。为探索植物叶经济谱性状对水分环境响应,以石湖风景区内9种典型园林植物为研究对象,从不同角度分析其性状变量因子在水分环境变化下权衡关系。结果表明,香樟、南天竹、红枫、榔榆属于"快速投资-收益"型物种,紫薇、石楠、银杏、桂花、毛鹃属于"缓慢投资-收益"型物种。可知,园林植物对水分环境变化响应具有差异性,为石湖风景区未来植物景观提升策略制定提供理论依据。

As the main participants in urban greening,garden plants maintain the health and stability of the urban ecological and environmental system.However,the selection mechanism of garden plants often follows past experience or subjective opinions,and always lacks scientific basic theoretical support.As a quantitative indicator of the trade-off of plant resources,leaf economic spectrum reflects the relationship between plant response to changes in the external environment and plant phenotype traits,and could help the researchers choose appropriate plant species when dealing with different environmental factors.Therefore,in order to understand the response of plant leaf economic spectrum traits to water environment,nine typical garden plants in Shihu Scenic Area were taken as the research objects,and the trade-off relationship of their trait variable factors under water environment changes was analyzed from different angles.The results showed that Cinnamomum septentrionale,Nandina domestica,Acer palmatum and Ulmus parvifolia belonged to"quick investment-return"species,while Lagerstroemia indica,Photinia serratifolia,Ginkgo biloba,Osmanthus fragrans and Rhododendron×pulchrum belonged to"slow investment-return"species.It was concluded that the response of garden plants to water environment changes was different,and it provided an important theoretical guidance for the formulation of the future plant landscape promotion strategies for Shihu Scenic Area.