Alkalinity identification of chernozems southern by methods of multispectral satellite scanning
DOI:
https://doi.org/10.31073/acss86-05Keywords:
Satellite image; Secondary alkalinization; Spectral brightness; Exchangeable Na+; Exchangeable K+; Spectral curveAbstract
The procedure for identifying the characteristics of soils` alkalinization (natural and secondary) has been carried out using the spectral characteristics of satellite images performed by the ETM+ multispectral camera on board the "Landsat 7" satellite. A comparative analysis of data from ground field and laboratory research of alkalinization of Chernozems southern and the spectral characteristics of these soil images revealed the closest relationship between the content of exchange Na+ and K+ in the soil selection complex and the brightness of the images of Channel 2 («Green»), 3 («Red») and 5 ("SWIR1"). Quantitative analysis allowed describing these connections by two statistically significant regression equations, which, with the help of information from satellite imagery, can determine the presence of soil alkalinization without field and laboratory researches. The statistical analysis of the parameters of the spectral curves showed that irrigated secondary alkalinization soils are characterized by statistically proven higher brightness in all channels compared to the background alkalinization of Chernozems southern.
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