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Sediment Properties of Two Important Beels of Rajshahi, Bangladesh

Tariqul Alam
Department of Aquaculture, Sylhet Agricultural University, Sylhet, Bangladesh

Afzal Hussain
Departemt of Fisheries, Rajshahi University, Bangladesh

Sabina Sultana
Department of Zoology, Rajshahi University, Bangladesh

Tawheed Hasan
Department of Aquaculture, Sylhet Agricultural University, Sylhet, Bangladesh

K. Das Simon
Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor,D. E., Malaysia

A. Ghaffar Mazlan
Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor,D. E., Malaysia

Sabuj K. Mazumder
Department of Aquatic Resource Management, Sylhet Agricultural University, Sylhet, Bangladesh

Abstract/ Executive Summary:

A comprehensive chemical analysis study was conducted to assess the sediment properties of ?two important fresh water bodies: beels (Hilna beel and Beel Kumari beel) of Rajshahi division, Bangladesh from July 2007 to June 2008. Average pH, organic matter, organic carbon, total nitrogen, phosphorus, available sulphur, zinc, and potassium of the bottom sediment were 6.33±0.431, 1.426±0.642%, 0.83±0.372%, 0.082±0.027%, 11.92±4.014 ppm, 24.05±7.85 ppm, 1.95±0.449 ppm and 0.404±0.14 me 100g^-1 in Hilna beel and 6.78±0.684, 1.338±0.504%, 0.78±0.292%, 0.068±0.02%, 16.02±3.548 ppm, 22.17±7.24 ppm, 1.64±0.804 ppm and 0.39±0.121 me 100g^-1 in Beel Kumari beel, respectively. The chemical parameters obtained from this study except pH of soil of both beels were within the preferable range and were average productive. The study underlines the baseline information for better understanding the sediment chemistry and productivity of these commercially important freshwater resources of Bangladesh.

Keywords: Physico-chemical properties, Organic matter (OM), Total nitrogen (TN), Soil pH

Location: Rajshahi district.

Start Date: 00-07-2007

End Date: 00-06-2008

Program Area: Resource Development and Management

Commodity: Land development productivity

Objectives:

To assess the productivity of Hilna beel and Beel Kumari beel of Rajshahi division, Bangladesh by analyzing the chemical properties of sediments.

Methodology:

Field sampling: The study was conducted one year period from July 2007 to June 2008 on Hilna beel and Beel Kumari beel of Rajshahi division, Bangladesh (Figure 1). Hilna beel and Beel Kumari beel are basically floodplains and they cover about 1500 and 996 ha in rainy season and 160 and 156 ha in dry season, respectively. The sediments were sampled monthly and transported to the Fisheries laboratory, Rajshahi University, Bangladesh for further analysis. Laboratory analysis: Soil pH. The pH of the soil was measured electro-chemically using a glass electrode pH meter (HANNA instrument, model- HI 921 ON ATC). The ratio of soil and water as well as soil and 0.01M CaCl₂ solution was 1:2.5. Organic Carbon (C). Soil organic carbon of the samples was determined by dry combustion method with Leco-C-200 Carbon Analyzer. Organic matter (OM). The organic matter of the experimental soil was determined by multiplying the percentage of organic carbon with conventional Van-Bemmelen’s Factor of 1.724. Total Nitrogen (TN). The total nitrogen of the soil samples was determined by Micro- Kjeldhal method. Phosphorus (P). Available phosphorus of the soil samples was extracted by Ammonium floride (NH4F) extraction method and determined by Spectrophotometer Lamda-II, UV/vis (Perkin Elmer) at 890 nm wavelength after developing blue colour in ammonium molybdate ascorbic acid solution. Potassium (K). At first soil extraction was done with 1 M ammonium acetate and the content of potassium was measured using a flame photometer. Sulphur (S). The available sulphur of soil of the study area was extracted using calcium dihydrogen phosphate solution and determined by turbidiometric method using Lumbda- II Absorbance Spectrophotometer at 535 nm wavelength. Zinc (Zn). From the soil sample the Zinc content was measured by AAS (Atomic Absorption Spectrometer) on undiluted soil extract. Data analysis: All statistical analyses were performed with Microsoft office Excel 2003 and SPSS 11.5. Data were analysed by means of ANOVAs. The Tukey test was used to compare the means of the different results. Cochran's test was used prior to the ANOVA to test the assumption of homogeneity of variances

Source of Information: AACL Bioflux, 2014, Volume 7, Issue 1, 51-61

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

This study has provided a clear scenario of sediment properties of the two important water resources (beels) of Bangladesh. From the present study we found that most of the chemical parameters in the beels sediment were within the preferable range. As there is no previous study on the sediment chemistry of beels in Bangladesh, this study will enrich the literature on this particular field of study. Nevertheless, more analytical research needed to conduct on the investigation of pollutants namely pesticide contamination in these important freshwater bodies of Bangladesh.

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