Plant growth adaptability improvement of bio-based miscanthus fibre mortar using superabsorbent polymer

IF 9.7 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Journal of Cleaner Production Pub Date : 2024-12-16 DOI:10.1016/j.jclepro.2024.144453
Fan Wu, Xiaoqing Chen
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Abstract

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.

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生物基材料具有多孔结构、高吸水性和低环境影响等特点,正在成为植被恢复的创新解决方案。为了提高马齿苋纤维灰浆的保水能力,本研究调查了超吸收聚合物(SAP)含量(0.1 wt.%、0.2 wt.% 和 0.3 wt.%)对物理特性、机械强度、微观结构、植物生长性能、抗旱性以及种植后灰浆性能的影响。结果表明,添加低含量的 SAP(0.1% 和 0.2%)可提高保水能力,在 0.5 小时内可吸收其重量的 67-71% 的水,然后保留 21-27% 的吸收水直至 11 天。SAP 对植物种子的早期发芽和生根有显著影响。发芽后,植物在 SAP0.2% 和 SAP0.3% 的灰泥表面生长良好,与 Ref 灰泥相比,植物数量更多。此外,随着 SAP 含量的增加,植物覆盖率呈逐渐上升趋势。然而,植物覆盖率过高会对单株植物的株高、叶片和根系发育产生负面影响。此外,植物根系容易横向生长,植物根系会深入灰浆基质。增加马齿苋纤维灰泥的吸水性是提高植物抵抗干旱气候条件的有效方法。在可持续绿化项目中,考虑到良好的保水能力,在不牺牲其强度的情况下,使用 0.2% 的 SAP 更有利于提高植物的生长适应性。
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来源期刊
Journal of Cleaner Production
Journal of Cleaner Production 环境科学-工程:环境
CiteScore
20.40
自引率
9.00%
发文量
4720
审稿时长
111 days
期刊介绍: The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.
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