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 110
- Downloads 0
Solar Thermal Technologies Dynamics and Strategies for Market Creation in Sindh
In order to sketch Sindh?s RE (Renewable Energy) based scenario, it is vital to trace the dynamics of simplest RETs (Renewable Energy Technologies) such as STTs (Solar Thermal Technologies). STTs are simple to operate, e...
First Person Vision for Activity Prediction Using Probabilistic Modeling
Identifying activities of daily living is an important area of research with applications in smart-homes and healthcare for elderly people. It is challenging due to reasons like human self-occlusion, complex natural envi...
Optimizing Electricity Load and Cost for Demand Side Management in Smart Grid
This paper proposes a mechanism for OELC (Optimizing Electricity Load and Cost) for smart grid. The load of every smart home is predicted one-hour prior to their actual usage. To fulfill PL (Predicted Load) of each consu...
Wavelet Based Video Denoising using Probabilistic Models
Wavelet based image processing techniques do not strictly follow the conventional probabilistic models that are unrealistic for real world images. However, the key features of joint probability distributions of wavelet c...
Co-Relationship between California Bearing Ratio and Index Properties of Jamshoro Soil
Subgrade is a most important part of a pavement structure, which should have a reasonable stiffness modulus and shear strength. CBR (California Bearing Ratio) test is performed to evaluate stiffness modulus and shear str...