Impact of root hairs on microscale soil physical properties in the field.
Impact of root hairs on microscale soil physical properties in the field.
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DOI：
10.1007/s11104-022-05530-1
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发表时间：
2022
期刊：
影响因子：
4.9
通讯作者：
George, T. S.
中科院分区：
文献类型：
--
作者：
Marin, M.;Hallett, P. D.;Feeney, D. S.;Brown, L. K.;Naveed, M.;Koebernick, N.;Ruiz, S.;Bengough, A. G.;Roose, T.;George, T. S.
最近的实验室研究表明，根毛可能会改变土壤的物理行为，小范围地影响土壤孔隙度和保水性。然而，结果并不一致，并且不知道小规模的结构变化是否会对更大范围产生影响。因此，我们利用根际尺度的物理测量评估了根毛对现场土壤水力学特性的潜在影响。在粉质壤土和沙壤土中监测土壤保水特性以及机械和水力特性的变化。在田间试验中从植物建立到收获进行了测量，比较了代表与根毛长度相关的不同表型类别的三种大麦基因型。使用直径 3 毫米的球形压头测量土壤硬度和弹性，使用尖端半径为 0.4 毫米的小型渗透仪测量吸水性和防水性。在生长季节，植物引起土壤保水特性的变化，植物可用水增加了 21%。粉质壤土中存在根毛时，土壤硬度（P = 0.031）和弹性（P = 0.048）均显着降低，分别降低了50%和36%。与无毛突变体相比，在长有毛基因型的沙壤土中，根毛还导致显着较小的防水性（P = 0.007）（-49%）。通过选择改善土壤物理特性的根表型，可以实现改善土壤条件的经济作物育种，从而有助于提高土壤健康。在线版本包含可在 10.1007/s11104-022-05530-1 获取的补充材料。
Recent laboratory studies revealed that root hairs may alter soil physical behaviour, influencing soil porosity and water retention on the small scale. However, the results are not consistent, and it is not known if structural changes at the small-scale have impacts at larger scales. Therefore, we evaluated the potential effects of root hairs on soil hydro-mechanical properties in the field using rhizosphere-scale physical measurements. Changes in soil water retention properties as well as mechanical and hydraulic characteristics were monitored in both silt loam and sandy loam soils. Measurements were taken from plant establishment to harvesting in field trials, comparing three barley genotypes representing distinct phenotypic categories in relation to root hair length. Soil hardness and elasticity were measured using a 3-mm-diameter spherical indenter, while water sorptivity and repellency were measured using a miniaturized infiltrometer with a 0.4-mm tip radius. Over the growing season, plants induced changes in the soil water retention properties, with the plant available water increasing by 21%. Both soil hardness (P = 0.031) and elasticity (P = 0.048) decreased significantly in the presence of root hairs in silt loam soil, by 50% and 36%, respectively. Root hairs also led to significantly smaller water repellency (P = 0.007) in sandy loam soil vegetated with the hairy genotype (-49%) compared to the hairless mutant. Breeding of cash crops for improved soil conditions could be achieved by selecting root phenotypes that ameliorate soil physical properties and therefore contribute to increased soil health. The online version contains supplementary material available at 10.1007/s11104-022-05530-1.
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影响因子：
4.9
作者：
Carminati, Andrea;Moradi, Ahmad B.;Oswald, Sascha E.
通讯作者：
Oswald, Sascha E.
影响因子：
9.4
作者：
Koebernick, Nicolai;Daly, Keith R.;Roose, Tiina
通讯作者：
Roose, Tiina
影响因子：
5.8
作者：
Ceccarelli S;Grando S
通讯作者：
Grando S
DOI：
10.2136/sssaj1996.03615995006000030031x
发表时间：
1996-05-01
影响因子：
2.9
作者：
Bruand, A;Cousin, I;Begon, JC
通讯作者：
Begon, JC
影响因子：
6.1
作者：
Caravaca, F;Aiguacil, MM;Roldán, A
通讯作者：
Roldán, A