Leaching quantity effect on saline soils quality through unsaturated soil columns in Azizabad of Bam

Talebzadeh, M. (2011) Leaching quantity effect on saline soils quality through unsaturated soil columns in Azizabad of Bam. Masters thesis, University of Zabol.

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Accumulation of anions and cations in soil solution prevents plant nutrients uptake. The main problem in saline soils is soluble salts. Soils have the significant salts; therefore import leaching these soils. This study was conducted to evaluate the movement of solutes using soil columns picked from Azizabad of Bam. Leaching experiments was conducted on columns of five texture soils (clay loam, loam, sandy clay loam, sandy loam, loam sandy). The soils were filled in columns to achieve uniform bulk density 1.5 g cm-3. The columns were leached with approximately 5 PV. Effluents from each leaching were collected for chemical analysis. Leachate samples were analyzed for soluble cations (Ca2+, Mg2+, Na+ and K+). After completion of the leaching the soil columns were allowed to drain free, then split open and cut into 3 sections, each 10 ncm. Soil samples at different column depths were analyzed for Ec, Na+, Ca2+ and Mg+. The results showed that most of the solutes were removed from the soils during the first PV, and used water in leaching experiments could reduced solutes concentration, it follows saline soils, and this soils don’t have any need to corrector matter. Generally the effect of coarse texture soil on the ion movement is more than in the case of fine textured soil. The solute arrival in effluent solution is ahead when soil texture is coarse. The amount of clay, play an important role for retaining and ions removal from soil. The difference between the amounts of irrigation water seems necessary for salinity removal to the texture of soils. The most common of such reactions is cation exchange.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Leaching, Soil texture, Soil columns, Saline soils
Subjects: S Agriculture > S Agriculture (General)
Depositing User: admin admin1 admin2
Date Deposited: 29 May 2016 09:33
Last Modified: 29 May 2016 09:33
URI: http://eprints.uoz.ac.ir/id/eprint/704

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