yeganeh, M., Afyuni, M., Rezainejad, Y. (2009). Effect of Sewage Sludge on Soil Salinity Profile. , 22(2), 165-179. doi: 10.22092/ijsr.2009.126996
Mojgan yeganeh; M. Afyuni; Y. Rezainejad. "Effect of Sewage Sludge on Soil Salinity Profile". , 22, 2, 2009, 165-179. doi: 10.22092/ijsr.2009.126996
yeganeh, M., Afyuni, M., Rezainejad, Y. (2009). 'Effect of Sewage Sludge on Soil Salinity Profile', , 22(2), pp. 165-179. doi: 10.22092/ijsr.2009.126996
yeganeh, M., Afyuni, M., Rezainejad, Y. Effect of Sewage Sludge on Soil Salinity Profile. , 2009; 22(2): 165-179. doi: 10.22092/ijsr.2009.126996

Effect of Sewage Sludge on Soil Salinity Profile

پژوهش های خاک
Volume 22, Issue 2, February 2009, Pages 165-179    PDF (383.36 K)
Document Type: Research Paper
DOI: 10.22092/ijsr.2009.126996
Authors
Mojgan yeganeh* 1; M. Afyuni2; Y. Rezainejad3
1Former Graduate Student, Isfahan University of Technology
2Professor, Isfahan University of Technology
3Associate professor, Isfahan University of Technology
Abstract
Sewage sludge is widely used as a fertilizer and soil conditioner on agricultural lands. However because of high concentration of soluble salts in sewage sludge, it increases soil salinity. The objective of this study was to evaluate the residual and cumulative effects of sludge application on soil salinity. This study was conducted in Lavark experimental site with four rates (0, 25, 50 and 100 ton.ha-1) of sewage sludge. The plots received one, two, three or four years of sludge applications. Corn (Zea mays) and wheat (Triticum sativum) were planted in the first and second half of each year, respectively. Soil samples were collected at the end of wheat growing season at 20 cm increments to 100 cm depth from each plot. Soil samples were analyzed for EC, OC, Na, K, Mg, Ca, Cl, SO4 and HCO3. Sludge application significantly increased concentration of Na, Ca, K and Mg in the soil depths. Concentration of Cl, SO4 and HCO3 also significantly increased with sludge application. However, the effect of residual sludge application on soil salinity was minimal and because of leaching, soil EC did not reach the critical value that affect most plant growths.
Keywords
Sewage Sludge; Cation; Anion; Leaching
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