Submersion deteriorates the mechanical properties of Cynodon dactylon root and alters its failure type

IF 3.9 2区农林科学 Q1 AGRONOMY

Plant and Soil Pub Date : 2025-01-14 DOI:10.1007/s11104-025-07211-1

Deyu Liu, Zhubao Chen, Lun Zhang, Zhenyao Xia, Rui Xiang, Feng Gao, Qianheng Zhang, Ruidong Yang, Yu Ding, Yueshu Yang, Hai Xiao

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引用次数: 0

Abstract

Aims

Environmental stresses can influence root mechanical strength, the impact of submersion of the water level fluctuation zone on the root mechanical strength of Cynodon dactylon was evaluated in this study.

Methods

Variations in the physicochemical properties (root weight density and root activity), mechanical strengths (tensile and pullout strength) and failure types of C. dactylon roots were investigated using a submersion experiment with 8 durations (0, 15, 30, 60, 90, 120, 150, 180 d), with a treatment without submersion serving as the control (CK). Additionally, corresponding variation in the microstructure of the roots was observed.

Results

The root weight density, root activity, root tensile strength and pullout strength of C. dactylon rapidly decreased, followed by a gradual decrease with increasing duration, and the reductions during the first 15 d of submersion accounted for 65.15%, 75.86%, 61.14% and 68.26% of the maximum reduction during the submersion process, respectively. Negative power function relationships were found between root mechanical strength and root diameter. Submersion increased the proportion of fracture failures during the pullout process. Moreover, the influence of submersion on root mechanical strength and failure type was regulated by a reduction in root activity.

Conclusions

Submersion deteriorates the mechanical properties of C. dactylon roots and alters their failure type.

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浸水会恶化仙人掌根的机械特性并改变其破坏类型

目的环境应力会影响根机械强度，本研究评估了水位波动区浸没对仙人掌根机械强度的影响。方法通过 8 个持续时间（0、15、30、60、90、120、150 和 180 d）的浸没实验，研究了 Cynodon dactylon 根的理化性质（根重量密度和根活性）、机械强度（拉伸和拔出强度）和破坏类型的变化，并以不浸没的处理作为对照（CK）。结果C. dactylon 的根重密度、根活性、根抗拉强度和拔出强度迅速下降，随后随着时间的延长逐渐下降，浸没前 15 d 的降幅分别占浸没过程中最大降幅的 65.15%、75.86%、61.14% 和 68.26%。根部机械强度与根部直径之间存在负幂函数关系。浸没增加了拔出过程中断裂失败的比例。此外，浸没对根机械强度和破坏类型的影响受根活性降低的调节。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Plant and Soil 农林科学-农艺学

CiteScore

8.20

自引率

8.20%

发文量

543

审稿时长

2.5 months

期刊介绍： Plant and Soil publishes original papers and review articles exploring the interface of plant biology and soil sciences, and that enhance our mechanistic understanding of plant-soil interactions. We focus on the interface of plant biology and soil sciences, and seek those manuscripts with a strong mechanistic component which develop and test hypotheses aimed at understanding underlying mechanisms of plant-soil interactions. Manuscripts can include both fundamental and applied aspects of mineral nutrition, plant water relations, symbiotic and pathogenic plant-microbe interactions, root anatomy and morphology, soil biology, ecology, agrochemistry and agrophysics, as long as they are hypothesis-driven and enhance our mechanistic understanding. Articles including a major molecular or modelling component also fall within the scope of the journal. All contributions appear in the English language, with consistent spelling, using either American or British English.