Keywords:
- irrigated soils
- soil health
- Soil Quality Index (SQI)
- agrophysical properties
- agrochemical indicators
- heavy metals
- environmental contamination
- salinity
- Fergana region
Abstract
This study evaluates the soil health status of irrigated soils in the Fergana region using the scientifically grounded integrated indicator — the Soil Quality Index (SQI). The research included analysis of soil texture, humus content, nutrient reserves, salinity level, and concentrations of toxic chemical elements. The results indicate that soil fertility parameters remain relatively stable; however, the exceedance of permissible concentrations of certain heavy metals and arsenic (As) contributes to the formation of environmental risks. Based on the SQI assessment, scientific and practical conclusions were formulated regarding the sustainable use of irrigated soils in the Fergana region and the improvement of their ecological condition.
References
Doran J.W., Parkin T.B. Defining and assessing soil quality // Soil Science Society of America Journal. – 1994. – Vol. 58, № 3. – P. 1–10. – DOI: 10.2136/sssaj1994.03615995005800030001x.
Karlen D.L., Mausbach M.J., Doran J.W., Cline R.G., Harris R.F., Schuman G.E. Soil quality: A concept, definition, and framework for evaluation // Soil Science Society of America Journal. – 1997. – Vol. 61. – P. 4–10. – DOI: 10.2136/sssaj1997.03615995006100010001x.
Andrews S.S., Karlen D.L., Cambardella C.A. The Soil Management Assessment Framework: A quantitative soil quality evaluation method // Soil Science Society of America Journal. – 2004. – Vol. 68. – P. 1945–1962. – DOI: 10.2136/sssaj2004.1945.
Mukherjee A., Lal R. Comparison of soil quality index using three methods // Soil and Tillage Research. – 2014. – Vol. 143. – P. 97–105. – DOI: 10.1016/j.still.2014.05.005.
Rahmanipour F., Marzaioli R., Bahrami H.A., Fereidouni Z., Bandarabadi S.R. Assessment of soil quality indices in agricultural lands of Qazvin Province, Iran // Ecological Indicators. – 2014. – Vol. 40. – P. 19–26. – DOI: 10.1016/j.ecolind.2013.12.003.
Askari M.S., Holden N.M. Quantitative soil quality indexing of temperate arable management systems // Soil and Tillage Research. – 2015. – Vol. 150. – P. 57–67. – DOI: 10.1016/j.still.2015.01.002.
Alloway B.J. Heavy metals in soils: Trace metals and metalloids in soils and their bioavailability. – Dordrecht: Springer, 2013. – 613 p.
Kabata-Pendias A. Trace elements in soils and plants. – 4th ed. – Boca Raton: CRC Press, 2011. – 534 p.
To'th G., Hermann T., Da Silva M.R., Montanarella L. Heavy metals in agricultural soils of the European Union with implications for food safety // Environment International. – 2016. – Vol. 88. – P. 299–309. – DOI: 10.1016/j.envint.2015.12.017.
Xakimov F., Abdullaev A. O‘zbekiston sug‘oriladigan tuproqlarining agrokimyoviy holati // O‘zbekiston agrar fanlari jurnali. – 2018. – № 4. – B. 25–30.
Ibragimov N., Raxmatov Sh. Farg‘ona vodiysi tuproqlarining ekologik holati // Tuproqshunoslik va agrokimyo. – 2020. – № 2. – B. 41–47.
Tojiboev S. Sug‘orish ta’sirida tuproq sho‘rlanishi va ifloslanishi // Qishloq xo‘jaligi fanlari. – 2019. – № 3. – B. 33–38.
