Effects of Cu and Zn Coated Urea on Eh, pH and Solubility of Cu and Zn in Rice Soils

The concentration of Cu (Copper) and Zn (Zinc) decreases upon flooded conditions of rice soil. To assess the effects of flooding and application of Cu and Zn coated urea on changes in Eh, pH and solubility of Cu and Zn, a glasshouse experiment was conducted at Universiti Putra Malaysia. Rice plants...

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Main Authors: Saima Kalsum Babar, Naheed Akhtar Talpur, Aijaz Ali Khooharo
Format: Article
Language:English
Published: Mehran University of Engineering and Technology 2018-10-01
Series:Mehran University Research Journal of Engineering and Technology
Online Access:http://publications.muet.edu.pk/index.php/muetrj/article/view/585
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spelling doaj-aa5f5058c6c5407fbe08dfc55062a7d12020-11-24T21:47:43ZengMehran University of Engineering and TechnologyMehran University Research Journal of Engineering and Technology0254-78212413-72192018-10-0137462563210.22581/muet1982.1804.14585Effects of Cu and Zn Coated Urea on Eh, pH and Solubility of Cu and Zn in Rice SoilsSaima Kalsum Babar0Naheed Akhtar Talpur1Aijaz Ali Khooharo2Department of Soil Science, Faculty of Crop Production, Sindh Agriculture University, Tando Jam.Department of Soil Science, Faculty of Crop Production, Sindh Agriculture University, Tando JamDepartment of Statistics, Faculty of Social Sciences, Sindh Agriculture University Tando JamThe concentration of Cu (Copper) and Zn (Zinc) decreases upon flooded conditions of rice soil. To assess the effects of flooding and application of Cu and Zn coated urea on changes in Eh, pH and solubility of Cu and Zn, a glasshouse experiment was conducted at Universiti Putra Malaysia. Rice plants (30 days old seedlings of type MR-219) on two soils (riverine and alluvium and marine alluvium) were transplanted. Nine treatments with variable rates and combinations of Cu and Zn coated urea were applied. The sources of fertilizers were copper sulfate and zinc sulfate. Eh values decreased with flooding time in both soils. The changes of Eh values were more negative in control treatments and stabilized after 3 weeks of submergence. The Eh variation was not observed affectively in the treated soils however, soil pH increased with flooding time. During the 3rd week of submergence, pH was neutral (pH 7.0). In both soils, Cu and Zn treated soil showed lower Eh and higher pH values as compared to untreated soil. Concentration of Cu and Zn in soil solution decreased with flooding. The higher Cu and Zn contents in soil were recorded in treated soils. Reduced solubility of Cu and Zn in control soils was related to larger changes in Eh and pH values. Mean comparison with Tukey’s HSD (Honest Significant Difference) test showed that Cu and Zn solubility decreased with decreased Eh and increased pH in the soil solution (p < 0.05%).http://publications.muet.edu.pk/index.php/muetrj/article/view/585
collection DOAJ
language English
format Article
sources DOAJ
author Saima Kalsum Babar
Naheed Akhtar Talpur
Aijaz Ali Khooharo
spellingShingle Saima Kalsum Babar
Naheed Akhtar Talpur
Aijaz Ali Khooharo
Effects of Cu and Zn Coated Urea on Eh, pH and Solubility of Cu and Zn in Rice Soils
Mehran University Research Journal of Engineering and Technology
author_facet Saima Kalsum Babar
Naheed Akhtar Talpur
Aijaz Ali Khooharo
author_sort Saima Kalsum Babar
title Effects of Cu and Zn Coated Urea on Eh, pH and Solubility of Cu and Zn in Rice Soils
title_short Effects of Cu and Zn Coated Urea on Eh, pH and Solubility of Cu and Zn in Rice Soils
title_full Effects of Cu and Zn Coated Urea on Eh, pH and Solubility of Cu and Zn in Rice Soils
title_fullStr Effects of Cu and Zn Coated Urea on Eh, pH and Solubility of Cu and Zn in Rice Soils
title_full_unstemmed Effects of Cu and Zn Coated Urea on Eh, pH and Solubility of Cu and Zn in Rice Soils
title_sort effects of cu and zn coated urea on eh, ph and solubility of cu and zn in rice soils
publisher Mehran University of Engineering and Technology
series Mehran University Research Journal of Engineering and Technology
issn 0254-7821
2413-7219
publishDate 2018-10-01
description The concentration of Cu (Copper) and Zn (Zinc) decreases upon flooded conditions of rice soil. To assess the effects of flooding and application of Cu and Zn coated urea on changes in Eh, pH and solubility of Cu and Zn, a glasshouse experiment was conducted at Universiti Putra Malaysia. Rice plants (30 days old seedlings of type MR-219) on two soils (riverine and alluvium and marine alluvium) were transplanted. Nine treatments with variable rates and combinations of Cu and Zn coated urea were applied. The sources of fertilizers were copper sulfate and zinc sulfate. Eh values decreased with flooding time in both soils. The changes of Eh values were more negative in control treatments and stabilized after 3 weeks of submergence. The Eh variation was not observed affectively in the treated soils however, soil pH increased with flooding time. During the 3rd week of submergence, pH was neutral (pH 7.0). In both soils, Cu and Zn treated soil showed lower Eh and higher pH values as compared to untreated soil. Concentration of Cu and Zn in soil solution decreased with flooding. The higher Cu and Zn contents in soil were recorded in treated soils. Reduced solubility of Cu and Zn in control soils was related to larger changes in Eh and pH values. Mean comparison with Tukey’s HSD (Honest Significant Difference) test showed that Cu and Zn solubility decreased with decreased Eh and increased pH in the soil solution (p < 0.05%).
url http://publications.muet.edu.pk/index.php/muetrj/article/view/585
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