Root moisture content influence on root tensile tests of herbaceous plants

Root moisture content influence on root tensile tests of herbaceous plants
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根系含水量对草本植物根系拉伸试验的影响

DOI:
10.1016/j.catena.2018.08.012
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发表时间:
2019
期刊:
影响因子:
6.2
通讯作者:
Hallett Paul D
Hallett Paul D
中科院分区:
农林科学1区
文献类型:
--
作者:
Zhang Chaobo;Zhou Xia;Jiang Jing;Wei Yang;Ma Juanjuan;Hallett Paul D

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根系抗拉强度控制根系加固,但一系列因素,包括根水分和直径有这么大的影响,这是很难作出预测。在这项研究中,我们测量了变化的根系含水量如何影响根直径和根系抗张强度之间的关系草本植物。将阿尔泰狗娃花(Heteropappus altaicus)和毛果早熟禾(Poa sphondylodes)两种草本植物的新鲜根分为4组:(i)水饱和组、(ii)新鲜组、(iii)干燥6 h组和(iv)空气中12 h组。根直径和机械故障在拉伸之前和之后的水分处理进行了测量。随着根系含水量的增加,抗拉强度和抗张力呈线性下降,而平均根径呈线性增加。根系含水量对根系抗张强度的变异性有很大的影响。这强调了在测试过程中避免干燥的必要性。田间土壤水势对根系强度的影响有待进一步研究。我们建议在测试前将根浸泡在水中,以减少这种误差来源。
Root tensile strength controls root reinforcement, but a range of factors including root moisture and diameter have such a large impact that it is difficult to make predictions. In this study, we measured how variable root moisture content affects the relationship between root diameter and root tensile strength of herbaceous plants. Fresh roots of two herbaceous plants,Heteropappus altaicusandPoa sphondylodeswere divided into four groups: (i) saturated in water, (ii) kept fresh, (iii) or dried for 6 h or (iv) 12 h in air. Root diameter and mechanical failure under tension before and after the moisture treatment were measured. Tensile strength and tensile force of both species decreased linearly while mean root diameter increased linearly with increasing root moisture content. Root moisture content has a large impact on the variability of root tensile strength. This emphasizes the need to avoid desiccation during testing. In field impacts of soil water potential on root strength requires further study. We recommend soaking roots in water before testing to decrease this source of error.
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影响因子: 4.9
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