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A study of Vertisol genesis in North Eastern Greece.

机译:对希腊东北部Vertisol成因的研究。

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Four pedons from the alluvial plain of Drama (NE Greece) were investigated in order to provide detailed information on their morphology, chemical, physical and mineralogical properties, classification and genesis. The clay content of all the samples is relatively high (>35%). Soil reaction with HCl ranges from slightly alkaline (7.2) to alkaline (pH 8.3). The organic matter content ranges from 0.53 to 1.03% in the surface horizons, while the other horizons contain considerably less. The CaCO3-equivalent content ranges between 0.1% and 18.1%. Due to ploughing, gilgai microrelief is absent, but slickenside was apparent in all of the soils studied. Smectite (montmorillonite) is the dominant clay mineral and was mainly inherited from the parent sediments and by neoformation. High smectite content, in combination with alternating wet-dry periods (xeric soil moisture regime), results in the formation of the morphological characteristics that are typical for Vertisols. The pedons located in the highest points of the alluvial plain were classified as Chromic Haploxererts and those in the lowest landscape were classified as Typic Haploxererts. Free iron oxides range between 1.3 and 1.9% for the Chromic Haploxererts to only 0.4-0.9% for the Typic Haploxererts. The properties of these Vertisols reflect the impact of climate (alternating wet-dry periods), landscape position (alluvial plain; seasonally water saturated), and parent material (clayey, smectite-dominated fluvio-lacustrine, highly calcareous sediments).
机译:为了研究有关它们的形态,化学,物理和矿物学性质,分类和成因的详细信息,研究了来自戏剧性冲积平原(希腊东北部)的四个脚架。所有样品的粘土含量都较高(> 35%)。土壤与HCl的反应范围从弱碱性(7.2)到碱性(pH 8.3)。在地表层中,有机物含量范围为0.53%至1.03%,而其他地层中的含量则低得多。 CaCO 3 当量含量在0.1%至18.1%之间。由于耕作,没有吉尔盖微浮雕,但在所有研究过的土壤中都存在滑石甙。蒙脱石(蒙脱石)是主要的粘土矿物,主要从母体沉积物中继承并形成新岩层。蒙脱石含量高,再加上干湿交替(干燥的土壤水分状态),导致形成了典型的Vertisols形态特征。位于冲积平原最高点的脚踏板被分类为Chromic Haploxererts,而位于最低景观的脚踏板被分类为Typic Haploxererts。铬单倍体的游离氧化铁含量在1.3%至1.9%之间,而Typhope单倍体的游离氧化铁含量仅为0.4-0.9%。这些Vertisol的特性反映了气候(交替的干湿时期),景观位置(冲积平原;季节性水饱和)和母体材料(粘土,蒙脱石为主的氟湖相,高度钙质沉积物)的影响。

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