Bio-based materials are emerging as an innovative solution for vegetation restoration thanks to their porous structure, high water absorption and low environmental impact. To improve the water retention capacity of miscanthus fibre mortar, the effects of superabsorbent polymer (SAP) content (0.1 wt%, 0.2 wt% and 0.3 wt%) on the physical characteristics, mechanical strength, microstructure, plant growth performance, drought resistance and the mortar properties after planting are investigated in this study. The results show that the addition of low SAP content (0.1% and 0.2%) enhances the water retention capacity, which can absorb 67–71% of water by its weight at 0.5 h and then retain 21–27% of absorbed water until 11 days. The SAP has a significant effect on the early germination and rooting of plant seeds. The plants grow well on the mortars SAP0.2% and SAP0.3% surface after germination, showing a more number of plants, compared to the mortar Ref. Moreover, as the SAP content increases, the plant cover percentage shows a gradually increasing trend. However, a high plant cover percentage exhibits a negative impact on plant height, leaves and root development for the individual plant. In addition, plant roots are prone to grow laterally, and plant roots can penetrate deeply into the mortar matrix. The increased water absorption of the miscanthus fibre mortar is an effective method to improve plants' resistance to drought climatic conditions. The use of 0.2% SAP is preferred for improving plant growth adaptability in sustainable greening projects, considering good water retention ability and without sacrificing its strength.

中文翻译：

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使用高吸水性聚合物的生物基芒草纤维砂浆的植物生长适应性改进


生物基材料因其多孔结构、高吸水率和低环境影响而成为一种创新的植被恢复解决方案。为提高芒草纤维砂浆的保水能力，本研究研究了高吸水性聚合物 （SAP） 含量 （0.1 wt%、0.2 wt% 和 0.3 wt%） 对种植后物理特性、机械强度、微观结构、植物生长性能、抗旱性和砂浆特性的影响。结果表明，添加低 SAP 含量（0.1% 和 0.2%）增强了保水能力，在 0.5 小时时可以吸收 67-71% 的重量水，然后保留 21-27% 的吸收水直到 11 天。SAP 对植物种子的早期发芽和生根有显着影响。发芽后，植物在砂浆 SAP0.2% 和 SAP0.3% 表面上生长良好，与砂浆相比，显示出更多的植物 Ref.此外，随着 SAP 含量的增加，植物覆盖率呈逐渐增加的趋势。然而，高植物覆盖率对单株植物的株高、叶子和根系发育有负面影响。此外，植物根系容易横向生长，植物根系可以深入砂浆基质。芒草纤维砂浆的吸水率增加是提高植物对干旱气候条件的抵抗力的有效方法。考虑到良好的保水能力且不牺牲其强度，在可持续绿化项目中使用 0.2% SAP 是提高植物生长适应性的首选。