摘要
植物根系是高等植物的主要营养器官之一,起到支撑、运输、吸收水分和营养物质等作用,是植物高度分化的重要标志。植物根系与植物体新陈代谢、介质环境理化性质、介质生物组成乃至生物多样性均有密切联系。随着城市化进程发展,城市下垫面硬质化面积增大,地表、地下基础设施的建设与更迭,使城市生态系统内植物根系生长受到限制,主要为表层土壤容重高、孔隙度低、基层骨料与异物较多、有机质及其他营养元素含量低且空间分布存在异质性。这导致城市植物根系构型对环境胁迫作出响应,其空间分布对城市基础设施产生损坏并有倒伏风险。基于此,建议研发针对城市环境高大木本根系的检测方法与仪器,通过建立各树种根系构型与分布的预测模型,将结果应用至城市绿地树种选择、绿地改造、树木迁移等实践中,耦合树木地上、地下部分并揭露两者联系,探明乔木各器官形态及生理层面响应机制,以此完善与细化城市树木各类评估体系。
Plant roots are one of the primary nutrient organs in higher plants.They play a significant role in supporting the plant,facilitating transportation,absorbing water and nutrients and serve as a crucial indicator of plant differentiation.The relationship between plant roots and plant metabolism,physicochemical properties of the growth medium,biological composition of the medium,and biodiversity is closely intertwined.With the ongoing process of urbanization,the increasing expansion of impervious surfaces in urban areas and the construction and redevelopment of surface and underground infrastructure restrict the urban ecosystem.Major limitations include high surface soil bulk density,low porosity,the presence of numerous base materials and foreign objects,and heterogeneous spatial distribution of organic matter and other nutritional elements.These conditions prompt adaptive responses in the configuration of urban plant root systems under environmental stress,leading to potential damage to urban infrastructure and the risk of plant overturning.It is recommended to develop detection methods and instruments specifically designed for the extensive root systems of urban woody plants.Establishing predictive models for the root system configuration and distribution of various tree species can be applied to urban green space selection,green space renovation,tree transplantation,and other practical applications.Coupling the above-ground and underground parts of trees,revealing their interconnections,and understanding the morphological and physiological responses of tree organs will contribute to refining assessment systems for various urban trees.
作者
来雨晴
蓝伟根
张炎晶
邓星
陈晓熹
郭微
孙延军
袁程
刘仪烨
周兰平
沈晓岚
尹文
Lai Yuqing;Lan Weigen;Zhang Yanjing;Deng Xing;Chen Xiaoxi;Guo Wei;Sun Yanjun;Yuan Cheng;Liu Yiye;Zhou Lanping;Shen Xiaolan;Yin Wen(Shenzhen Park Management Center,Shenzhen 518000,Guangdong,China;Zhongkai Agricultural Engineering College,Guangzhou 510225,Guangdong,China;Shenzhen Landscape Co.,Ltd.,Shenzhen 518049,Guangdong,China;Guangdong Ecological Engineering Vocational College,Guangzhou 510520,Guangdong,China)
出处
《绿色科技》
2024年第3期14-20,共7页
Journal of Green Science and Technology
关键词
植物根系生长
城市环境
影响因素
木本植物
土壤环境
土壤理化性质
plant root growth
urban environment
influencing factors
woody plants
soil environment
soil physicochemical properties
作者简介
来雨晴(1991-),女,硕士,工程师,研究方向为园林植物与观赏园艺。;通讯作者:蓝伟根(1969-),男,高级工程师,研究方向为园林及公园绿化建设管理。
