Relationship Between Available Fe and its Chemical Fractions in Some Calcareous Soils of East Azarbaijan Province

In this research available iron was measured in 21 calcareous surface soil samples (0-30 cm) by five methods including DTPA, AB-DTPA, AC-EDTA, hydroxylamine, reference ammonium oxalate and rapid ammonium oxalate. Fe fractions were also determined by the modified sequential extraction procedures intr...

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Main Authors: A. Reyhanitabar, K. Khalkal, N. Pashapour
Format: Article
Language:fas
Published: Isfahan University of Technology 2017-11-01
Series:علوم آب و خاک
Subjects:
Online Access:http://jstnar.iut.ac.ir/article-1-3038-en.html
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spelling doaj-bdc821fdb7944515995cb5cbc1904da62021-04-20T08:21:21ZfasIsfahan University of Technology علوم آب و خاک2476-35942476-55542017-11-012136983Relationship Between Available Fe and its Chemical Fractions in Some Calcareous Soils of East Azarbaijan ProvinceA. Reyhanitabar0K. Khalkal1N. Pashapour2 1. Dept. of Soil Sci., Agric. Faculty, Univ. Tabriz. Tabriz, Iran. 1. Dept. of Soil Sci., Agric. Faculty, Univ. Tabriz. Tabriz, Iran. 1. Dept. of Soil Sci., Agric. Faculty, Univ. Tabriz. Tabriz, Iran. In this research available iron was measured in 21 calcareous surface soil samples (0-30 cm) by five methods including DTPA, AB-DTPA, AC-EDTA, hydroxylamine, reference ammonium oxalate and rapid ammonium oxalate. Fe fractions were also determined by the modified sequential extraction procedures introduced by Singh et al. According to results, rapid ammonium oxalate and AC-EDTA methods extracted the maximum (856.03 mg.kg-1) and minimum (4.46 mg.kg-1) amounts of Fe, respectively. Rapid ammonium oxalate extraction method, in addition to Fe-Afeox, extracted other fractions of iron such as Fe-Ex, Fe-Om, Fe-CFeox and Fe-Res. Hydroxylamine method compared to other methods, ectracted Fe mostly from the amorphous oxides source. Regression analysis indicates that Fe-Ex, Fe-AFeox and Fe-Res fractions have major and Fe-Car and Fe-Mnox have minor role in releasing available Fe (with AB-DTPA and DTPA) in the studied soil. According to the statistical relationships, carbonates associated Fe, does not seem a potential source of available Fe in calcareous soils. Organic carbon content and cation exchange capacity of the soils appear the two most influential soil properties that predict available Fe in the studied soils.http://jstnar.iut.ac.ir/article-1-3038-en.htmlab-dtpaavailable fedtpairon fractionssequential extraction.
collection DOAJ
language fas
format Article
sources DOAJ
author A. Reyhanitabar
K. Khalkal
N. Pashapour
spellingShingle A. Reyhanitabar
K. Khalkal
N. Pashapour
Relationship Between Available Fe and its Chemical Fractions in Some Calcareous Soils of East Azarbaijan Province
علوم آب و خاک
ab-dtpa
available fe
dtpa
iron fractions
sequential extraction.
author_facet A. Reyhanitabar
K. Khalkal
N. Pashapour
author_sort A. Reyhanitabar
title Relationship Between Available Fe and its Chemical Fractions in Some Calcareous Soils of East Azarbaijan Province
title_short Relationship Between Available Fe and its Chemical Fractions in Some Calcareous Soils of East Azarbaijan Province
title_full Relationship Between Available Fe and its Chemical Fractions in Some Calcareous Soils of East Azarbaijan Province
title_fullStr Relationship Between Available Fe and its Chemical Fractions in Some Calcareous Soils of East Azarbaijan Province
title_full_unstemmed Relationship Between Available Fe and its Chemical Fractions in Some Calcareous Soils of East Azarbaijan Province
title_sort relationship between available fe and its chemical fractions in some calcareous soils of east azarbaijan province
publisher Isfahan University of Technology
series علوم آب و خاک
issn 2476-3594
2476-5554
publishDate 2017-11-01
description In this research available iron was measured in 21 calcareous surface soil samples (0-30 cm) by five methods including DTPA, AB-DTPA, AC-EDTA, hydroxylamine, reference ammonium oxalate and rapid ammonium oxalate. Fe fractions were also determined by the modified sequential extraction procedures introduced by Singh et al. According to results, rapid ammonium oxalate and AC-EDTA methods extracted the maximum (856.03 mg.kg-1) and minimum (4.46 mg.kg-1) amounts of Fe, respectively. Rapid ammonium oxalate extraction method, in addition to Fe-Afeox, extracted other fractions of iron such as Fe-Ex, Fe-Om, Fe-CFeox and Fe-Res. Hydroxylamine method compared to other methods, ectracted Fe mostly from the amorphous oxides source. Regression analysis indicates that Fe-Ex, Fe-AFeox and Fe-Res fractions have major and Fe-Car and Fe-Mnox have minor role in releasing available Fe (with AB-DTPA and DTPA) in the studied soil. According to the statistical relationships, carbonates associated Fe, does not seem a potential source of available Fe in calcareous soils. Organic carbon content and cation exchange capacity of the soils appear the two most influential soil properties that predict available Fe in the studied soils.
topic ab-dtpa
available fe
dtpa
iron fractions
sequential extraction.
url http://jstnar.iut.ac.ir/article-1-3038-en.html
work_keys_str_mv AT areyhanitabar relationshipbetweenavailablefeanditschemicalfractionsinsomecalcareoussoilsofeastazarbaijanprovince
AT kkhalkal relationshipbetweenavailablefeanditschemicalfractionsinsomecalcareoussoilsofeastazarbaijanprovince
AT npashapour relationshipbetweenavailablefeanditschemicalfractionsinsomecalcareoussoilsofeastazarbaijanprovince
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