Volume 21, Issue 3 (Fall 2017)                   jwss 2017, 21(3): 69-83 | Back to browse issues page

XML Persian Abstract Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Reyhanitabar A, Khalkal K, Pashapour N. Relationship Between Available Fe and its Chemical Fractions in Some Calcareous Soils of East Azarbaijan Province. jwss 2017; 21 (3) :69-83
URL: http://jstnar.iut.ac.ir/article-1-3038-en.html
1. Dept. of Soil Sci., Agric. Faculty, Univ. Tabriz. Tabriz, Iran. , areyhani@tabrizu.ac.ir
Abstract:   (5830 Views)

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.

Full-Text [PDF 495 kb]   (1878 Downloads)    
Type of Study: Research | Subject: Ggeneral
Received: 2015/07/16 | Accepted: 2016/11/14 | Published: 2017/11/8

Add your comments about this article : Your username or Email:

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

© 2024 CC BY-NC 4.0 | JWSS - Isfahan University of Technology

Designed & Developed by : Yektaweb