边坡绿化是一项极其重要的绿化工程，其不仅能够有效预防边坡地质灾害，修复生态环境，还能够提升公路边坡防护体系质量，对于生态修复与灾害防治极其重要，同时还具备多重社会、经济及环境价值。现通过查阅文献、实地调研、专家咨询等方法，建立了普适性边坡绿化植物选择的原则，系统分析甘肃生态气候土壤分布规律特征，并在此基础上形成甘肃不同气候生态区边坡适宜的绿化植物数据集及相应工程措施。调研结果表明，依据甘肃多样的生态气候和相应的土壤特征特点，将甘肃划分为 8大气候生态区，各区的气候、土壤肥力和障碍因子特征，具体表现为陇南南部河谷亚热带湿润区，土壤大部分为棕壤、黄壤，土层深厚；陇南北部暖温带湿润区，土壤为褐土、淋溶褐土；陇中南部温带半湿润区，土壤主要为黑钙土、栗钙土；陇中北部温带半干旱区，土壤主要为灰钙土、栗褐土；河西北部温带干旱区，土壤主要为灰棕漠土；河西西部暖温带干旱区，土壤主要为灌溉灰漠土；河西南部高寒半干旱区，土壤主要为冷钙土、灌淤土；甘南高寒湿润区，土壤主要为亚高山草甸土、暗棕壤。根据不同生态区域的气候及土壤特征，进而确定适宜各区绿化植物的生理特征，科学合理搭配草、花、灌、乔等绿化植物，研究建立适配植物的数据库，提出“气候 -土壤 -坡度”三维选植策略，在气候条件优越的陇南南部亚热带黄壤地带，宜栽植的边坡绿化植物种类丰富；在气候干旱、盐碱土广布的河西西部灰漠土地带，宜栽植耐热耐旱耐盐碱植物沙棘、甘草、泡泡刺等；在气候高寒的甘南草甸土地带，宜栽植耐寒耐旱植物垂穗鹅观草、多花木兰等。这一研究成果为甘肃省边坡绿化及其生态修复提供了分区化、精准化的植物选择依据，对提升绿化工程生态适应性和可持续性具有重要实践价值。

Slope greening is an extremely important ecological engineering measure. It can effectively prevent geological haz.ards of slope, restore ecological environment, and improve the quality of highway slope protection system. It plays a crucial role in eco.logical restoration and disaster prevention, and possesses multiple social, economic, and environmental values. Through literature re.view, field investigation, and expert consultation, the principle for universal selection of slope greening plant was established. The dis.tribution characteristic of ecological climate and soil in Gansu was systematically analyzed, and based on this analysis, a dataset ofsuitable slope greening plants and corresponding engineering measures for different climatic ecological zones in Gansu was developed.The investigation result indicated that according to the diverse ecological climate and soil characteristics, Gansu can be divided into 8major climatic-ecological zones. The climatic condition, soil fertility, and constraint factors of each region show distinct features. Spe.cifically, the Southern Longnan Valley Subtropical Humid Zone is mainly characterized by brown soil and yellow soil with deep soillayer, the Northern Longnan Warm-temperate Humid Zone mainly contains cinnamon soils and leached cinnamon soils, the SouthernCentral Gansu Temperate Semi-humid Zone is dominated by chernozem and chestnut soil, the Northern Central Gansu TemperateSemi-arid Zone mainly contains sierozems and cinnamon-desert soils, the Northern Hexi Temperate Arid Zone mainly contains gray-brown desert soils, the Western Hexi Warm-temperate Arid Zone mainly contains irrigated gray desert soils, the Southern Hexi AlpineSemi-arid Zone mainly contains frigid calcic soils and irrigation-silted soils, and the Gannan Alpine Humid Zone mainly contains sub.alpine meadow soil and dark brown forest soil. According to the climatic and soil characteristics of each ecological zone, the physiologi.cal characteristic of suitable greening plant was determined. A scientific combination of grasses, flowers, shrubs, and tree species wasproposed, and a database of adaptive plant species was established. A "climate-soil-slope gradient" three-dimensional plant selec.tion strategy was proposed. In the Southern Longnan Subtropical Yellow-brown Soil Zone with favorable climatic condition, a widerange of plant species can be used for slope greening. In the arid Western Hexi Gray-brown Desert Soil Zone with arid climate andwidespread saline-alkaline soils, heat-, drought-, and salt-tolerant plants such as sea buckthorn (Hippophae rhamnoides), licorice (Glycyrrhiza uralensis), and Nitraria sphaerocarpa are recommended. In the Gannan Alpine Meadow Soil Zone with cold climate, cold-and drought-tolerant plants such as Kochia prostrata, Chinese Iris (Iris lactea var. chinensis), and Multiflower Rose (Rosa multiflora)are recommended. These findings provide a zoned and precise basis for plant selection in slope greening and ecological restoration inGansu Province and have important practical significance for improving ecological adaptability and sustainability of greening engineer-ing.

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甘肃圆陇路桥机械化公路工程有限责任公司技术服务项目( 2021-SDLH2-QT08)。