Use of the Color Indices of Humus Soil Horizons as Indicators of Soil Evolution in the Steppe Zone of the Transvolga Region under Irrigation Conditionsстатья
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Дата последнего поиска статьи во внешних источниках: 9 июля 2015 г.
Аннотация:Abstract—Changes that occurred in the humus parameters and humus horizon color of soils of an experi mental production farm in the Saratov oblast during 50 years of irrigation indicate the development of a northern humid version of soilforming process. Its rate is determined by the confinement of soils to meso and microrelief elements. The qualitative differences in the character of humification in soils on watersheds and middle and lower slopes are confirmed by statistically reliable differences in the color parameters of soils in the CIEL*a*b* color system. The lightness (L*) and the yellowness (b*) are the most informative param eters. The lightness is related to the content of humus and probably to its qualitative composition, and the changes in yellowness result from the masking of yellowcolored mineral iron compounds by the newly formed humus. These color indices are reliable criteria for color assessment and can be used for the detection and estimation of changes in the irrigated soils of the steppe regions.
Keywords: chestnut soils, humus status, soil color, Munsell scale, spectral reflectance, CIEL*a*b* color system DOI: 10.1134/S1064229315050105