近年来,由于全球变暖和环境恶化带来的日益严峻的挑战,风景园林领域非常重视低碳景观。盐碱地区的土壤生态条件表现为质量差,导致树木生长条件次优。这个,反过来,阻碍了他们有效固碳的能力,从而减少碳汇的潜在好处。此外,在这些地区维护树木景观比传统的绿地产生更多的碳排放,很难从树基碳中获益。从低碳角度对盐碱地区绿地内的树木进行综合评价;通过确定适宜绿化的优势树种,我们可以为在盐碱环境中的城市实施低碳绿化计划提供精确的科学依据。因此,作为一个案例研究,本研究调查了天津桥园公园,渤海湾地区典型的盐碱地公园。采用层次分析法(AHP)从低碳角度对园区50种乔木和灌木进行了评价。结果表明,该评价体系由4个准则层和15个指标因素组成。标准层的相对权重依次为生境适应性(B2)>固碳能力(B1)>低碳管理与保护(B3)>景观美学(B4)。指标层将更大的权重值分配给净同化(C1),盐碱适应性(C3),耐旱性(C4),灌溉和施肥需求(C8),增长率(C2),和对贫瘠的适应性(C5)。这些树被分为五个不同的类别,每个指标的优缺点都表现出明显的差异。根据综合评分,树木分为三个层次。一级植物表现出最佳的碳效率性能,总共包括12种(例如,柏树,水曲柳和木芙蓉),并在各个方面表现出卓越的性能。二级树木,由26种组成(e。g油松,泡桐,女贞子×vicaryi),综合得分第二高。此外,三级树木,涵盖12种(例如g宏碁单声道,CedrusDeodara,白玉兰),综合得分较低。在渤海湾地区实施低碳绿化工程时,建议广泛使用一,二等树种,而三级树种应谨慎使用。这项研究的结果可以作为科学鉴定适合渤海湾地区城市公园绿地的树种的宝贵资源,其特征是主要是盐碱土。此外,在评估其他类型的盐碱地时,评估系统的开发可以指导低碳树种的选择。
The field of landscape architecture has placed significant emphasis on low-carbon landscapes due to the increasing challenges posed by global warming and environmental deterioration in recent years. The soil ecological conditions in saline-alkaline areas are characterized by poor quality, resulting in suboptimal growth conditions for
trees. This, in turn, hampers their ability to effectively sequester carbon, thereby diminishing the potential benefits of carbon sinks. Additionally, the maintenance of tree landscapes in such areas generates more carbon emissions than does conventional green land, making it difficult to reap the benefits of tree-based carbon. A comprehensive evaluation of
trees in green park spaces in saline-alkaline areas is conducted from a low-carbon perspective; by identifying the dominant tree species that are well suited to greening, we can offer a precise scientific foundation for implementing low-carbon greening initiatives in cities situated in saline-alkaline environments. Therefore, as a
case study, this study investigates Tianjin Qiaoyuan Park, a typical saline park in the Bohai Bay region. The hierarchical analysis method (AHP) was used to evaluate 50 species of
trees and shrubs in the park from a low-carbon perspective. The results show that the evaluation system consists of four criterion layers and 15 indicator factors. The relative weight of the criterion layer followed the order of habitat adaptability (B2) > carbon sequestration capacity (B1) > low-carbon management and conservation (B3) > landscape aesthetics (B4). The indicator layer assigned greater weight values to net assimilation (C1), saline and alkaline adaptability (C3), drought tolerance (C4), irr igation and fertilization needs (C8), growth rate (C2), and adaptability to barrenness (C5). The trees were classified into five distinct categories, with each exhibiting significant variation in terms of the strengths and weaknesses of the indicators. According to the comprehensive score, the
trees were categorized into three levels. The Grade I plants exhibited the best carbon efficiency performance, comprising a total of 12 species (e.g. Sabina chinensis, Fraxinus chinensis \'Aurea\' and Hibiscus syriacu), and demonstrated superior performance in all aspects. Grade II trees, consisting of 26 species (e.g Pinus tabuliformis, Paulownia fortunei, Ligustrum × vicaryi), had the second-highest comprehensive score. Moreover, Grade III trees, encompassing 12 species (e.g Acer mono, Cedrus deodara, Magnolia denudata), exhibited lower comprehensive scores. The extensive use of Grade I and II tree species is recommended in the implementation of low-carbon greening projects in the Bohai Bay region, while Grade III tree species should be judiciously utilized. The findings of this research can serve as a valuable resource for the scientific identification of tree species that are suitable for urban park green spaces in the Bohai Bay region, which is characterized by predominantly saline and alkaline soil. Additionally, the development of an evaluation system can guide the selection of low-carbon tree species when evaluating other types of saline and alkaline lands.