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Study of the role of Crotalaria juncea in reducing the salt content in meadow soils in the Aral sea region

Surayyo NegmatovaCotton Breeding, Seed Production and Agrotechnologies Research Institute. Tashkent, 111202, UzbekistanBakhodir KhalikovCotton Breeding, Seed Production and Agrotechnologies Research Institute. Tashkent, 111202, UzbekistanGayrat YokubovUrganch State University, UzbekistanManzura NurullaevaUrganch State University, UzbekistanXudoyshukur BerdiqulovJizzakh State Pedagogical University, UzbekistanShukhrat YokubovUrganch State University, UzbekistanDarmonjon QuvandiqovaUrganch State University, UzbekistanBakhadir BazarbaevTashkent Institute of Irrigation and Agricultural Mechanization Engineers, National research University, 39 Kori Niyazi street, Tashkent, 100000, UzbekistanZulfiya KannazarovaTashkent Institute of Irrigation and Agricultural Mechanization Engineers, National research University, 39 Kori Niyazi street, Tashkent, 100000, Uzbekistan

2026

Ochiq kirishOlmos

Litsenziya: cc-by

ABI

Annotatsiya

The Aral Sea region has experienced severe environmental degradation due to increasing salinity, desertification, and a significant decline in water resources. These processes have led to the accumulation of toxic salts in soils, negatively affecting ecosystem stability and agricultural productivity. This study evaluates the potential of the drought- and salt-tolerant tropical plant Crotalaria juncea L. as a sustainable solution for rehabilitating saline and degraded lands. Field experiments were conducted to assess the effects of seed treatment with Geohumate stimulant and the application of liquid fertilizer (NPK 20%) at a rate of 1.5 kg ha⁻¹ during the budding and flowering stages. Soil samples were collected from depths of 0–30 cm and 30–50 cm to determine changes in salt composition. The results showed a reduction in major salt components, including Ca(HCO₃)₂ (0.008–0.010%), CaSO₄ (0.062–0.050%), Na₂SO₄ (0.125–0.083%), NaCl (0.018–0.004%), MgSO₄ (0.036–0.030%), and MgCl₂ (0.034–0.037%). The total salt content decreased from 0.283 to 0.226 mg kg⁻¹, representing a significant reduction of 10.3–10.4% in toxic salts. Additionally, the establishment of Crotalaria juncea improved vegetation cover, enhanced soil moisture retention, and contributed to the stabilization of desert grassland ecosystems. These findings demonstrate that integrating salt-tolerant crops with appropriate agronomic practices can effectively reduce soil salinity and support ecological restoration in arid and saline environments. This approach offers a promising, nature-based solution for mitigating land degradation in the Aral Sea region.

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Identifikatorlar

DOI: 10.25252/se/2026/254050

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