摘要
在“双碳”目标背景下,探索城市公园绿地提质增效路径,通过筛选高固碳植物及优化配置模式,提升干旱半干旱地区城市绿地的碳汇能力,为低碳型公园城市建设提供理论与实践依据。本研究以天水市麦积区城市公园绿地为研究对象,基于样地调查与光合速率测定,量化植物固碳能力,结合叶面积指数、冠幅等指标,提出不同立地条件下的高固碳植物配置模式,并通过优化改造对比分析固碳效益提升效果。结果表明,七叶树、杨树、紫叶李等乔木年固碳量达200~400 kg/年,优化后的护路林带固碳量从3.2 t hm^(-2)提升至4.9 t hm^(-2),绿化率提高25%;同时,乔灌草多层次配置、耐水湿植物组合等模式兼顾了生态功能与景观美学需求。通过乡土化、适地适树原则配置高固碳植物,构建多层级垂直结构,可有效提升城市绿地碳汇能力,为干旱半干旱地区城市公园景观提质增效提供可推广的技术路径。
Under the"dual carbon"goals,this study explores pathways to improve the quality and efficiency of urban park green spaces by screening high carbon-sequestration plants and optimizing their configuration patterns,aiming to enhance the carbon sequestration capacity of urban green spaces in arid and semi-arid regions,and to provide theoretical and practical foundations for low-carbon park city construction.Taking the urban park green spaces in Maiji district,Tianshui city as the research subject,the study quantified plant carbon sequestration capabilities through field plot surveys and photosynthetic rate measurements.By integrating indicators such as leaf area index and canopy coverage,high carbon-sequestration plant configuration models for different site conditions were proposed,and the carbon sequestration benefits of optimized designs were analyzed.The results showed that tree species such as Aesculus chinensis,Populus tomentosa,and Prunus cerasifera exhibited annual carbon sequestration rates of 200~400 kg/year.After optimization,the carbon sequestration of roadside forest belts increased from 3.2 t hm^(-2)to 4.9 t hm^(-2),with a 25%improvement in greening rate.Additionally,multi-layered configurations of trees,shrubs,and grasses,as well as water-tolerant plant combinations,balanced ecological functionality and landscape aesthetics.By adhering to the principles of localization and site-appropriate tree selection,the construction of multi-level vertical plant communities effectively enhances urban green space carbon sequestration,offering a replicable technical pathway for improving landscape quality and carbon efficiency in arid and semi-arid regions.
作者
张亚雄
孙丽娟
ZHANG Yaxiong;SUN Lijuan(Gansu Forestry Voctech University,tianshui Gansu 741020,China;Maiji District Garden Service Center,Tianshui City,tianshui Gansu 741020,China)
出处
《青海农林科技》
2025年第2期62-70,共9页
Science and Technology of Qinghai Agriculture and Forestry
基金
中国式现代化背景下甘肃加快发展方式绿色转型路径研究(23JRZE0515)。
关键词
双碳
城市公园
植物配置
景观
Two carbon
City park
Arrangement of plants
Landscape
