AN IMPACT OF IRRIGATION ON MORPHOGENETIC DIAGNOSTICS OF ALLUVIAL MEADOW-FOREST SOILS IN THE KHUBA-KHACHMAS REGION OF AZERBAIJAN
Abstract
Results are given from a study on the influence of irrigation on diagnostic indices of alluvial meadow-forest soils in the Khuba-Khachmas region of Azerbaijan. Field work was done in 2010–2014. The turbidity of stream and irrigation water was observed to significantly increase (3.79–6.54 g/l) in the rainy spring-autumn periods and drastically decrease (0.80–1.87 g/l) in summer due to the reduced amount of precipitation in the mountainous territories. Weighted deposits and their water-soluble parts are rich in humus (1.7–2.0 and 0.049–0.053%, respectively), total nitrogen (0.09–0.13%), carbonates (5.1–6.3%), and clay fraction. Weighted deposits of stream and irrigation water have been found to significantly influence irrigated soils, which results in forming a deep (50–60 cm) cultured horizon in the soil profile, and distinct indications of irrigation deposits. Soil density commonly reaches to values of 1.38–1.45 g/cm3 in surface and subsurface horizons that is due to an accumulation of clay (65–70%) and clay-loam (28–39%). In the fractional composition of humus in soils under forest, the first fraction of humic acids (21.5–25.3%) and fulvic acids (15.0–23.2%)prevail, while irrigated soils are represented by an increased content of humic acids (30–35%). Unlike virgin soils, irrigated soils contain more humin. The soil profile is rich in Al2O3 (17.4–20.5%) and Fe2O3 (8.4–10.2%) in the total chemical composition, but the content of SiO2 significantly decreases, and that of CaO increases in the arable horizons of irrigated soils due to carbonated alluvial deposits.
About the Authors
V. G. Gasanov
Institute of Soil Science and Agrochemistry, National Academy of Sciences of Azerbaijan
Azerbaijan
Azerbaijan
Candidate of Science in Agriculture, Laboratory Head,
5, Mameda Ragima St, Baku, 1073
B. N. Ismailov
Institute of Soil Science and Agrochemistry, National Academy of Sciences of Azerbaijan
Azerbaijan
Azerbaijan
Candidate of Science in Agriculture, Lead Researcher,
5, Mameda Ragima St, Baku, 1073
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Review
For citations:
Gasanov V.G., Ismailov B.N. AN IMPACT OF IRRIGATION ON MORPHOGENETIC DIAGNOSTICS OF ALLUVIAL MEADOW-FOREST SOILS IN THE KHUBA-KHACHMAS REGION OF AZERBAIJAN. Siberian Herald of Agricultural Science. 2017;47(2):105-113. (In Russ.)
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