Effects of Cu and Zn Coated Urea on Eh, pH and Solubility of Cu and Zn in Rice Soils
Journal Title: Mehran University Research Journal of Engineering and Technology - Year 2018, Vol 37, Issue 4
Abstract
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%).
Authors and Affiliations
Saima Kalsum Babar, Naheed Akhtar Talpur, Aijaz Ali Khooharo
Keywords
Related Articles
- EP ID EP394645
- DOI 10.22581/muet1982.1804.14
- Views 133
- Downloads 0
Apneic Events Detection Using Different Features of Airflow Signals
Apneic-event based sleep disorders are very common and affect greatly the daily life of people. However, diagnosis of these disorders by detecting apneic events are very difficult. Studies show that analyzes of airflow s...
Performance Enhancement of Low Voltage Distribution Network in Developing Countries using Hybrid Rehabilitation Technique
Majority of the developing countries are facing problem of low supply voltage coupled with shortage of electrical energy. There is a growing concern for ways and means to preserve the existing resources and optimize the...
Effectiveness and Future Prospects of Telemedicine/Remote Health Care Management Applications in Pakistan
Medical/Health care system is spraining in Pakistan because of innovative technology, activities and services as per their financial cost (position) which is increasing day by day. This research is intended for the asses...
Comparison of Effects of Entropy Coding Schemes Cascaded with Set Partitioning in Hierarchical Trees
WT (Wavelet Transform) is considered as landmark for image compression because it represents a signal in terms of functions which are localized both in frequency and time domain. Wavelet sub-band coding exploits the self...
Effect of Heating Rate on Microstructural Developments in Cold Heading Quality Steel used for Automotive Applications
CHQ (Cold Heading Quality) steels are assumed to be non-heat treatable so strengthened by cold forming which is a quick and mass production makes it low cost manufacturing process. In this study, microstructure and phase...