Key Laboratory of Bio-resources and Eco-environment (Ministry of Education), College of Life Sciences, Sichuan University, Chengdu, 610064, China.
Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), College of Life Sciences, Southwest University, Chongqing, 400700, China.
Sci Rep. 2018 Aug 14;8(1):12109. doi: 10.1038/s41598-018-30651-y.
External-soil spray seeding (ESSS), a technique of spraying artificial soil materials onto bare slopes for vegetation cover construction, has been widely used to restore rock-cut slopes. However, studies on the effect of the practical application of this technique on different topographic aspects have been rarely performed. In this study, two topographic aspects, namely, north-facing versus south-facing, were investigated under two railway lines, and two local natural slopes (north-facing versus south-facing) were selected as references. Vegetation and soil conditions, which are paramount aspects of ecological restoration assessment, were characterized in terms of the richness and diversity indices, vegetation canopy cover, basic soil physico-chemical properties, and structural characteristics of these slopes. Results showed that (1) the topographic aspect significantly affected the vegetation restoration and artificial soil quality of rock-cut slopes restored by ESSS; (2) the ecological restoration effect of north-facing slopes were better than that of south-facing slopes; and (3) the vegetation and soil conditions of natural slopes were better than those of rock-cut slopes. Therefore, additional scientific management measures should be implemented to promote the ecological restoration of rock-cut slopes, especially for south-facing slopes.
外部土壤喷播（ESSS）是一种将人工土壤材料喷播到裸坡上以进行植被覆盖建设的技术，已广泛用于修复岩质边坡。然而，对于该技术在不同地形方面的实际应用效果的研究却很少进行。在这项研究中，选择了两条铁路线的两个地形方面（北坡和南坡），并选择了两个当地自然边坡（北坡和南坡）作为参考。植被和土壤条件是生态恢复评估的重要方面，从丰富度和多样性指数、植被冠层覆盖度、基本土壤物理化学性质以及这些边坡的结构特征等方面对其进行了描述。结果表明：（1）地形方面显著影响了 ESSS 修复的岩质边坡的植被恢复和人工土壤质量；（2）北坡的生态恢复效果优于南坡；（3）自然边坡的植被和土壤条件优于岩质边坡。因此，应采取额外的科学管理措施来促进岩质边坡的生态恢复，特别是对南坡。
