混播草种可提高根系生成和植物-土壤加固效果

IF 3.6 2区 农林科学 Q2 ENVIRONMENTAL SCIENCES
Yuan Wang, Hao Gu, Sheng Liu
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引用次数: 0

摘要

植被是加固边坡和恢复生态的一种广泛使用的生态友好型方法。作为一种潜在的种植策略,混合种植植物通常被推荐用于提高生物多样性,但混合种植植物对土壤加固和边坡稳定性的影响尚不明确。针对这一问题,我们对两种典型的草本护坡植物 Chrysopogon zizanioides 和 Cynodon dactylon 进行了研究。分析了不同草本植物的生物力学特性,探讨了单一种植和混合种植下它们的根系分布和土壤加固性能。结果表明,混合种植能显著增加根系的数量和根面积比。42 天后,在 0.1 厘米的深度上,混合种植的根系数量比单一种植的香根草增加了 111.42%,比单一种植的百慕大草增加了 19.57%。混播可以通过增加表观内聚力来加固土壤,表观内聚力的最大增幅为 47.9%。边坡稳定性分析结果表明,植被主要依靠根区的机械加固和根区以外的水文加固。生长 42 天后,0.1 米深的混合种植比单一种植香根草的边坡稳定性提高了 11.94%,比单一种植百慕大草的边坡稳定性提高了 27.12%,植被的机械效应和水文效应均显著增强。这些研究结果表明,在植被建立初期,混合种植可以促进植物的发育和生长,提高根系产量,增强植物-土壤加固和边坡稳定性。因此,在制定边坡加固和生态恢复策略时,可以更多地考虑混合种植植物,最大限度地利用植物间的竞争特性,在提高生物多样性的同时降低浅层滑坡的风险。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mixed Grass Species Enhances Root Production and Plant–Soil Reinforcement
Vegetation is a widely used eco‐friendly approach for slope reinforcement and ecological restoration. As a potential planting strategy, mixed planting of plants is often recommended to improve biodiversity, but the effects of mixed planting on soil reinforcement and slope stability are not yet clear. To address this issue, a study on two typical herbaceous slope protection plants, Chrysopogon zizanioides and Cynodon dactylon, were conducted. The biomechanical characteristics of different herbaceous plants were analyzed, and their root distribution and soil reinforcement performance under single and mixed planting were explored. Results show that mixed planting could significantly increase the number and root area ratio of root systems. At 0.1 cm depth after 42 days, the root number under mixed planting increased by 111.42% compared to vetiver grass monoculture and by 19.57% compared to bermuda grass monoculture. Mixed planting can provide stronger soil reinforcement by increasing apparent cohesion, with a maximum increase in apparent cohesion of 47.9%. The results of slope stability analysis showed that vegetation mainly relied on mechanical reinforcement in the root zone and hydrological reinforcement outside the root zone. After 42 days of growth, mixed planting at 0.1 m depth increased slope stability by 11.94% compared to vetiver grass monoculture and by 27.12% compared to bermuda grass monoculture, with both mechanical and hydrological effects of vegetation significantly enhanced. These findings suggest that mixed planting can promote plant development and growth, improve root production, and enhance plant–soil reinforcement and slope stability during the early establishment of vegetation. Therefore, in formulating slope reinforcement and ecological restoration strategies, more consideration can be given to mixed planting of plants, maximizing the utilization of competition characteristics between plants, and reducing the risk of shallow landslides while improving biodiversity.
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来源期刊
Land Degradation & Development
Land Degradation & Development 农林科学-环境科学
CiteScore
7.70
自引率
8.50%
发文量
379
审稿时长
5.5 months
期刊介绍: Land Degradation & Development is an international journal which seeks to promote rational study of the recognition, monitoring, control and rehabilitation of degradation in terrestrial environments. The journal focuses on: - what land degradation is; - what causes land degradation; - the impacts of land degradation - the scale of land degradation; - the history, current status or future trends of land degradation; - avoidance, mitigation and control of land degradation; - remedial actions to rehabilitate or restore degraded land; - sustainable land management.
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