Effects of winter wheat and endogeic earthworms on soil physical and hydraulic properties
Effects of winter wheat and endogeic earthworms on soil physical and hydraulic properties
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冬小麦和内生蚯蚓对土壤物理和水力性质的影响
DOI：
10.1016/j.geoderma.2021.115126
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发表时间：
2021
期刊：
影响因子：
6.1
通讯作者：
Hallam J
中科院分区：
文献类型：
--
作者：
Hallam J
蚯蚓直接和间接影响土壤的物理水力特性。我们研究了冬小麦和常见的欧洲蚯蚓 Allolobophora greentica 之间的相互作用，测试对土壤物理水力特性的影响。进行了三种不同土壤质地和田间相关蚯蚓密度的柱实验。在蚯蚓处理中，饱和水力传导率（Ks）随着时间的推移而增加，其中在植物加蚯蚓处理中增加最快。 16 周后，在包含植物和蚯蚓的处理中，在壤土、粉壤土和沙壤土中，相对于对照，Kshad 分别增加了 12、34 和 39 倍。蚯蚓的存在导致直径 >3 毫米的孔隙对水流的贡献增加了 88.5%。在大多数处理中，与对照相比，植物和蚯蚓处理中的土壤持水能力和 5 厘米表土的水稳定性团聚体百分比均显着增加，其中植物加蚯蚓处理的增幅最大。有蚯蚓的情况下植物生长得比没有蚯蚓的情况下要快。我们的研究表明，与仅存在蚯蚓或植物时相比，同时存在蚯蚓和植物时对土壤物理性质的协同和累加效应。它表明，不仅垂直穴居的无性蚯蚓对土壤水力性质有显着影响，而且内生蚯蚓（例如 A.氯替卡康还有助于土壤水流调节。
Earthworms directly and indirectly affect soil physico-hydraulic properties. We studied interactions between winter wheat and the common European earthwormAllolobophora chlorotica,testing for impacts upon soil physico-hydraulic properties. Column experiments with three different soil textures and field-relevant earthworm densities were conducted. Saturated hydraulic conductivity (Ks) increased over time in earthworm treatments, with the increase occurring most rapidly in the plant plus earthworm treatment. After 16 weeksKshad increased in the treatment comprising both plants and earthworms by factors of 12, 34 and 39 in the loam, silt-loam and sandy-loam soils respectively relative to controls. The presence of earthworms resulted in an 88.5% increase in the contribution of pores >3 mm diameter to water flow. In the majority of treatments, soil water-holding capacity and percentage water-stable aggregates of the 5 cm topsoil in both the plant and the earthworm treatments increased significantly compared to controls with the plant plus earthworm treatment showing the greatest increase. Plant growth was greater in the presence than absence of earthworms. Our study shows synergistic and additive effects on soil physical properties in the presence of both earthworms and plants compared to when only earthworms or plants are present. It shows that it is not just vertical-burrowing anecic earthworms that can have a significant effect on soil hydraulic properties but that field-relevant densities of endogeic earthworms such asA. chloroticacan also contribute to soil water flow regulation.
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