为了解铁路绿化带植被近地表层的生态水文效应及其对线路边坡稳定性的防护作用,对郑州铁路局管辖范围内陇海线、京广线3种典型绿化带植被的凋落物、0~30 cm土壤的持水性能进行了测定.结果表明,植被凋落物与表层土壤具有良好的生态水文效应,植被近地表层的持水量可达到年平均降雨量的5.90% ~12.20%、降雨最多月份降雨量的25.65% ~53.01%,这在降雨较少的北方地区对绿化带植被发育与边坡稳定性是有利的;而沙质土壤较高的渗透速率,使降雨快速下渗,对保障边坡稳定性具有重要意义.认为在保证行车安全的前提下,根据具体情况选择不同植物进行绿化设计与建设,可保障交通线路边坡稳定性,并具有较好的水土保持效益.%In order to understand the eco-hydrology effect of near soil surface of railway green belt and its effect of maintaining the railway line slope stability,3 typical green belts along the Longhai line and the Beijing-Guangzhou line under the jurisdiction of Zhengzhou Railway Bureau were selected to deter-mine the water holding characteristics of the litters and the 0~30 cm layer soil. The result shows that:there is a good eco-hydrological effect between the vegetation litters and the soil,with the water holding capacity of near soil surface reaching 5.90% to 12.20% of the annual average precipitation, and 25.65% to 53.01% of the highest monthly average precipitation,which has a positive effect on green belt vegetation development and the line slope stability in northern region with less rainfall. The higher water infiltration rate of sandy soil is more important to guarantee the slope stability. It is believed that under the premise of ensuring the driving safety,selecting different plants for greening design and con-struction according to specific conditions, can ensure the stability of traffic line slope and bring good soil and water conservation benefits.
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