Micromorphology of solonetzic horizons as related to environmental events in the Caspian Lowland
文献类型：期刊论文
| 作者 | Lebedeva (Verba), M. ; Gerasimova, M. ; Konyushkova, M. |
| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
 |
| 出版日期 | 2009-06 |
| 卷号 | 6期号:2页码:132–138 |
| 关键词 | Pedogenic trend natric horizon biogenic feature salt |
| ISSN号 | 1672-6316 |
| 通讯作者 | Lebedeva, M |
| 英文摘要 | Micromorphology of solonetz species with special attention to natric horizon was studied in microcatenas at the Dzhanybek Research Station (northwestern Caspian Lowland). The solonetzic (natric) horizon is easily identified, and it occurs at varying depths, which are the criteria for subdividing solonetzes into 4 species, namely, crusty, shallow, medium and deep. In this sequence, the depth of humus-accumulative horizons increases, and the upper boundary of salinity manifestations goes down. The following micromorphological features are assumed as typical for natric horizons: angular blocky microstructures with partially accommodated aggregates having sharp boundaries and narrow plane-like packing voids; b-fabric speckled in the aggregates' centers and monostriated at their peripheries merging into stress coatings; very few interpedal voids; organo-clay coatings; humusenriched infillings; no calcite and gypsum pedofeatures. A complete set of "natric" features was found only in the crusty solonetz; the shallow solonetz lacks only illuviation coatings, while the medium and deep species have several modifications of fabric elements: blocky aggregates have a rounded shape and are penetrated by biogenic channels favoring their further biogenic reworking; plant residues became more abundant and diverse, and blackened tissues occur; illuviation clay coatings evolved into papules; stress coatings gave birth to striated bfabrics, thus maintaining a high plasma orientation. The thin sections of natric horizons made 50 and 20 years ago were examined to study the influence of environmental changes (increase in precipitation and rise of ground water table) on micropedofeatures. The following processes took place: (i) in the topsoil: humus accumulation and biogenic structurization; (ii) in the natric horizon - re-arrangement of clay coatings into micromass b-fabrics; and (iii) in the lower part of the natric horizon - development of pseudosand fabric, calcite and gypsum formation. The trends revealed are in good agreement with the environmental events. |
| 语种 | 英语 |
| 公开日期 | 2013-08-14 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/6014]  |
| 专题 | 成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2009_Vol6 No.2 |
| 推荐引用方式 GB/T 7714 | Lebedeva ,Gerasimova, M.,Konyushkova, M.. Micromorphology of solonetzic horizons as related to environmental events in the Caspian Lowland[J]. JOURNAL OF MOUNTAIN SCIENCE,2009,6(2):132–138. |
| APA | Lebedeva ,Gerasimova, M.,&Konyushkova, M..(2009).Micromorphology of solonetzic horizons as related to environmental events in the Caspian Lowland.JOURNAL OF MOUNTAIN SCIENCE,6(2),132–138. |
| MLA | Lebedeva ,et al."Micromorphology of solonetzic horizons as related to environmental events in the Caspian Lowland".JOURNAL OF MOUNTAIN SCIENCE 6.2(2009):132–138. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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