Abstract

In this article, we discuss the contribution of capillary wetting and multiple freezing and thawing to the formation and evolution of vesicular micro– and mesoporosity in an aggregate of 3 mm in diameter from the eluvial horizon of soddy–podzolic soil (Albic Glossic Retisol (Loamic, Cutanic)). The main visible changes occur during capillary wetting and the first four cycles of freezing and thawing. Capillary wetting of the air-dry aggregate initiates the formation of vesicular micropores in the soil mass. The first freezing fixates the newly formed vesicles and contributes to the development of microschlieren in the aggregate. The first thawing causes the isolation and growth of individual vesicular pores. In the subsequent three freeze–thaw cycles, freezing fixates the vesicular pore space pattern, whereas thawing promotes the coalescence of small vesicular pores into larger vesicular pores. During the fifth and next cycles, many large vesicular pores leave the deformed aggregates aggregate, so that horizontally oriented cryogenic microschlieren tend to predominate in the frozen aggregate after 10–20 freeze–thaw cycles.

中文翻译：

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冻结-融化周期中白垩纪光泽网的高空视野聚集体中气泡状孔的形成

摘要

在本文中，我们讨论了毛细湿润和多次冷冻和解冻对从水溶土壤到坡地土壤坡度为3 mm的聚集体中囊状微孔和中孔的形成和演化的贡献（Albic Glossic Retisol（Loamic ，Cutanic））。主要的可见变化发生在毛细管润湿以及冷冻和解冻的前四个循环中。风干的聚集体的毛细管润湿作用会在土壤团块中引发水泡微孔的形成。第一次冷冻会固定新形成的囊泡，并有助于聚集物中的微schlieren的发展。第一次融化会导致单个囊泡孔的分离和生长。在随后的三个冻融循环中，冷冻固定了囊泡的孔隙空间模式，融化促进小囊泡孔合并成较大的囊泡孔。在第五个和下一个循环中，许多大的囊泡孔使变形的聚集体聚集，因此在10-20次冻融循环后，水平定向的低温微细碎屑倾向于在冷冻聚集体中占主导地位。