Processes controlling the development of a shielding layer on natural soil
Processes controlling the development of a shielding layer on natural soil
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DOI：
10.1111/j.1365-2389.2011.01416.x
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发表时间：
2012-02
影响因子：
4.2
通讯作者：
A. Armstrong;J. Quinton;B. Heng;G. Sander
中科院分区：
文献类型：
--
作者：
A. Armstrong;J. Quinton;B. Heng;G. Sander
在文献中可以找到大量的研究，重点是表层盖层和结壳的形成及其对侵蚀的影响。相比之下，调查地表盾形成的研究有限，地表盾是土壤表面的一层松散的粗沉积物，尽管它对沉积物、营养物质、金属和微生物的迁移有影响。本研究采用降雨模拟研究的作用，坡度（2和10%），渗透（有和没有）和积水深度（0，0.3和0.7厘米）的发展上的粉质壤土和壤土砂土的表面屏蔽。结果表明，壤质砂土表面形成了由松散粗颗粒组成的连续屏蔽层，而粉壤土表面则由不同比例的团聚体、压实土和松散粗颗粒组成。渗透有一个有限的积极影响，屏蔽发展和坡度和积水深度的发展的表面特性的显着控制。
A significant amount of research focusing on the formation of surface seals and crusts and their effect on erosion can be found in the literature. In contrast, there has been limited research investigating the formation of surface shields, a layer of loose coarse sediment on the soil surface, despite the consequences for the transport of sediment, nutrients, metals and microorganisms. This study used rainfall simulation to examine the role of slope (2 and 10%), infiltration (with and without) and ponding depth (0, 0.3 and 0.7 cm) on the development of surface shields on a silt loam and a loamy sand soil. The results show that a continuous surface shield of loose coarse particles developed on the loamy sand, whereas the silt loam soil surface was covered by varying proportions of aggregates, compacted soil and loose coarse particles. Infiltration had a limited positive impact on shield development and both slope and ponding depth were significant controls over the development of the surface characteristics.