Ramala N. kyzy Orudjova, Mustafa G. ogly Mustafayev, Zumrud R. kyzy Qurbanova ASSESSMENT OF THE IMPACT OF IRRIGATION ON THE ECOLOGICAL STATE OF GRAY-BROWN SOILS OF THE GANJA-KAZAKH MASSIF
DOI: https://doi.org/10.15688/nsr.jvolsu.2022.2.4
Ramala N. kyzy Orudjova, Assistant, Department of General Agriculture, Genetics and Breeding, Azerbaijan State Agricultural University, Ataturk Avenue, 262, AZ2000 Ganja, Republic of Azerbaijan,
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Mustafa G. ogly Mustafayev, Doctor of Sciences (Agriculture), Academician of the Russian Academy of Natural Science, Head of the Laboratory of Melioration Soils, Institute of Soil Science and Agrochemistry of Azerbaijan National Academy of Sciences, M. Ragima St, 5, AZ10073 Baku, Republic of Azerbaijan,
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Zumrud R. kyzy Qurbanova, Candidate of Sciences (Engineering), Associate Professor, Department of Chemistry and Technology of Inorganic Substances, Azerbaijan State University of Petroleum and Industry, Azadlig Avenue, 20 (34), AZ1010 Baku, Republic of Azerbaijan,
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Abstract. The article presents the results of a study of irrigated gray-brown soils of the Ganja-Kazakh massif, the reasons for changes in individual soil properties associated with the characteristics of specific soil-hydrogeological conditions. It was pointed out that irrigation of gray-brown soils with low mineralized slightly alkaline waters leads to a change in the qualitative composition of salts, an increase in the content of absorbed sodium and its activity. There is also a tendency towards dehumidification of irrigated soils and deterioration of their agrophysical properties. To eliminate the negative effects of irrigation, it is necessary to systematically, comprehensively regulate soil processes and regimes. Thus, during irrigation for 50–60 years, the main properties of gray-brown soils that determine its fertility deteriorated. However, a negative effect of irrigation water with a mineralization of 1.25–2.50 on the salt regime of the soil was noted. Optimization of the reclamation state of soils, prevention of salinization and increase of fertility is promoted by modern agrotechnical measures in combination with an optimal irrigation regime (68–78% HB), as well as with improving the quality of irrigation water by reducing its discharge from irrigated fields and the use of chemical meliorants. Since irrigation of gray-brown soils with mineralized waters was carried out on small areas until recently and, as a rule, was not accompanied by a general increase in the groundwater level, secondary salinization of soils is noted locally in the lowered relief elements. In the main irrigation area for most systems, the period of active salt accumulation observed in the first 3–5 years after the start of irrigation stabilizes at the level of 0.12–0.25% in arable horizons and 0.26–0.32% in sub-arable horizons, and they do not leave the gradation of unsalted. Based on the conducted research, generalization and analysis of the literature data, a systematics of changes on gray-brown soils occurring during irrigation was carried out.
Key words: irrigation, gray-brown soils, soil formation, fertility, transformational properties.
Citation. Orudjova R.N. kyzy, Mustafayev M.G. ogly, Qurbanova Z.R. kyzy. Assessment of the Impact of Irrigation on the Ecological State of Gray-Brown Soils of the Ganja-Kazakh Massif. Prirodnye sistemy i resursy [Natural Systems and Resources], 2022, vol. 12, no. 2, pp. 29-35. DOI: https://doi.org/10.15688/nsr.jvolsu.2022.2.4
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