Abstract Human impact on soil systems is now widely acknowledged. “Technosols” appeared in soil classification only a decade ago and the notion of “techno humus system” has emerged even more recently. Yet the variety of humus forms that could develop on Technosol remains largely unknown. To contribute to filling this knowledge gap, we studied the humus form developing on two Technosols resulting from the activity of a former coking plant and compared it with one developed on a Cambisol as a reference for the area. We used field description and micromorphology on thin sections coupled with a point-and-count method to precisely describe the surface of the humipedons of the area studied. A total of 13,841 counts and identifications were performed on 11 thin sections and spread into 17 fabric units. Micromorphology on thin soil sections revealed that epi-saprophagous organisms transformed most of the neo-formed organic matter on the Technosols studied, leading to an accumulation of feces on the surface of the humipedon. Our results suggested that the humus form developing on the Technosols was similar to a moder and exhibited the same ectorganic horizons (OL, OF, zOH), whilst overlaying a technogenic one composed mostly of coal fragments. We would like to propose the term “techno-moder” for this new humus form, developing in the absence of an A horizon. On the other hand, micromorphology allowed us to classify the humus form developed on the Cambisol as a eumull containing anthropic coal by-products. Specification of the humus form developing on such soils could represent a promising way to specify pedological processes such as organic matter decomposition, soil aggregation and also to enrich the humus form classification on Technosols.

中文翻译：

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Techno-moder：通过微形态学揭示的在 Technosols 上开发的新形态功能腐殖质形式的提议

摘要 人类对土壤系统的影响现已得到广泛承认。“Technosols”仅在十年前出现在土壤分类中，而“techno humus system”的概念最近才出现。然而，可以在 Technosol 上发育的腐殖质形式的多样性在很大程度上仍然是未知的。为了填补这一知识空白，我们研究了由前焦化厂活动产生的两种 Technosol 上形成的腐殖质形式，并将其与 Cambisol 上形成的腐殖质形式进行比较，作为该地区的参考。我们在薄片上使用现场描述和微形态学，并结合点计数方法来精确描述所研究区域的 humipedons 表面。总共对 11 个薄片进行了 13,841 次计数和识别，并将其分散到 17 个织物单元中。薄土壤切片的微形态学显示，表生腐生生物转化了所研究的 Technosols 上的大部分新形成的有机物质，导致粪便在 humipedon 表面堆积。我们的结果表明，在 Technosols 上发育的腐殖质形式与现代类似，并表现出相同的外生层（OL、OF、zOH），同时覆盖了主要由煤碎片组成的技术形成层。我们想为这种在缺乏 A 地平线的情况下发展起来的新腐殖质形式提出“技术现代”一词。另一方面，微形态学使我们能够将 Cambisol 上形成的腐殖质形式归类为含有人为煤副产品的 eumull。