Soil of the lower valley of the Dragonja river (Slovenia)

Acta Agriculturae Slovenica

Helena GRČMAN¹  Tomaž PRUS¹  Nina ZUPANČIČ² 

[1] Biotechnical faculty, p.p.2995, 1001 Ljubljana;Faculty of natural sciences and engineering, Department of Geology, Aškerčeva 12, 1000 Ljubljana;

关键词: rivers;    alluvial soils;    cambisols;    soil types;    sedimentation;    soil classification;    soil salinity;    site factors;    chemicophysical properties;   

DOI  :  10.14720/aas.2015.105.1.07

来源: DOAJ

【 摘 要 】

Soil of the lower valley of the river Dragonja developed under specific soil-forming factors. Soil development in the area was influenced by alluvial sediments originating from surrounding hills, mostly of flysch sequence rocks, as a parent material, Sub-Mediterranean climate and the vicinity of the sea. Different soil classification units (Gleysol and Fluvisol) were proposed for that soil in previous researches. The aim of our study was the evaluation of morphological, chemical and mineralogical characteristics of soil, based on detailed soil description and analyses, and to define the appropriate soil classification units. Field examinations revealed that the soil had a stable blocky or subangular structure and did not express substantial hydromorphic forms. Soil pH value was ranging from 6.9 to 7.5. In most locations electroconductivity (ECe) did not exceed 2 ds/m. Base saturation was high (up to 99 %), with a majority of Ca2+ ions. Exchangeable sodium percentage (ESP) was ranging from 0.2 to 3.8 %, which is higher compared to other Slovenian soils but does not pose a risk to soil structure. Soil has silty clay loam texture with up to 66 % of silt. Prevailing minerals were quartz, calcite and muscovite/illite. No presence of swelling clay mineral montmorillonite was detected. According to Slovenian soil classification, we classified the examined soil as alluvial soil. According to WRB soil classification, the soil was classified as Cambisol.

【 授权许可】

Unknown