Pollution status and physico-chemical parameters of soil of wetland areas in Oyo State
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Date
2008
Authors
Ayoola, S. O.
Journal Title
Journal ISSN
Volume Title
Publisher
Department of Aquaculture & Fisheries Mnagement, Federal University of Agriculture, Abeokuta, Ogun State
Abstract
Residues of agrochemicals used in intensive farming in wetlands of Nigeria are discharged into the aquatic environment through runoff or wind drift, which affects aquatic life. This study was conducted to establish baseline information on major agrochemicals in use for wetland farming in Oyo State and to examine and soil characteristics. Chemical analysis for pesticides were performed by reverse-phase high performance liquid chromatography (HPLC) on fish and analysis on soil was carried out using AOAC standard.
The result revealed that Glyphosate and Cypermethrin were mostly used. The rate of agrochemical usage varied significantly (P <0.05) among the location examined with Ajinapa (Orire LGA) having the highest rate while Papa- Eleye (Oluyole LGA) had the lowest. Analysis of fish to detect agrochemical levels indicated that the concentration of Glyphosate and Cypermethrin recorded were below the threshold level of 2µg/kg. The soil was generally sandy loam with pH ranging from 6.07 to 7.08. The physical characteristics of the soil did not very significantly (P> 0.05) between sites and season while the chemical components varied significantly (P <0.05) with sites.
Uncontrolled agrochemicals usage should be avoided by wetland farmers to reduce water pollution and loss of fish biodiversity.
Description
Staff publications
Keywords
Nigeria , Wetlands , Soil , Pollution , Fish resources , Research Subject Categories::NATURAL SCIENCES
Citation
Ayoola, S.O. (2009). Pollution status and physico-chemical parameters of soil of wetland areas in Oyo State. Journal of Aqua field studies.4:58-69