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Rauf M.A.,Soil Resources Development Institute | Hakim M.A.,University Putra Malaysia | Hanafi M.M.,University Putra Malaysia | Islam M.M.,University Putra Malaysia | And 2 more authors.
Australian Journal of Crop Science | Year: 2011

Arsenic (As) pollution in soil and water has aroused a considerable attention. Inorganic forms of arsenic are associated with various cancers and cause major health problems. An experiment was conducted to investigate the effect of soil arsenic (As) concentration on arsenic and phosphorous accumulation in root, straw, husk and grain of rice (Oryza sativa). BRRI dhan 33 and BR11 rice varieties were planted on six levels of As-contaminated growth media (T1=3.2, T2=11.6, T3=18.7, T4=38.6, T5=57.8 and T6=80.3 ppm) in a Completely Randomized Design (CRD) with six replications. Accumulation of arsenic in root, straw, husk and rice grain significantly increased when As dose increased in soil media. It was observed that As was highly concentrated in the roots, whereas phosphorous was highest in the grain. The T6 treatment (80.3 ppm) showed the highest As accumulation in different plant tissues. Arsenic contents in grain and husk of BR 11 were found higher than those of grain and husk of BRRI dhan 33. The straw and root of BRRI dhan 33 showed higher concentration of As than straw and root of BR 11. Phosphorous concentration of straw, husk and grain were also increased in higher As concentrations. In this study, rice plant showed high bioconcentration factor (BCF) and low translocation factor (TF), whereas As content in grains did not exceed the maximum permissible limit of 1 mg As kg -1, but straw As is highly risky for animal health as well as human food-chain. It could be concluded that BRRI dhan 33 can be cultivated instead of BR11 in As contaminated soil.

Azad M.A.K.,Bangladesh Agricultural University | Haque M.M.,Bangladesh Agricultural University | Hamid M.A.,Bangladesh Agricultural University | Yasmine F.,Bangladesh Agricultural University | And 2 more authors.
Legume Research | Year: 2012

A pot experiment was conducted under glass house condition to study the mechanism of salt tolerance in peanut at Bangladesh Institute of Nuclear Agriculture, Mymensingh, during February to July 2006. Two Spanish type varieties, Dacca-1 and Binachinabadam-3, and 1 Valencia type variety, Zhingabadam with unknown tolerance were exposed to 0.4 (unstressed), 3, 5, 7 and 9 dS/m doses of salinity at vegetative and flowering stages. The experiment was laid out in a factorial completely randomized design. It appeared that Binachinabadam-3 allocated higher assimilate to kernel at both vegetative and flowering stages through maintaining total sugar and chlorophyll 'a' contents close to unstressed treatment, particularly at 3-5 dS/m salinity doses.

Islam M.J.,Hajee Mohammad Danesh Science and Technology University | Hakim M.A.,Hajee Mohammad Danesh Science and Technology University | Hakim M.A.,University Putra Malaysia | Hanafi M.M.,University Putra Malaysia | And 6 more authors.
Journal of Environmental Biology | Year: 2014

Agriculture, rapid urbanization and geochemical processes have direct or indirect effects on the chemical composition of groundwater and aquifer geochemistry. Hydro-chemical investigations, which are significant for assessment of water quality, were carried out to study the sources of dissolved ions in groundwater of Dinajpur district, northern Bangladesh. The groundwater samplish were analyzed for physico-chemical properties like pH, electrical conductance, hardness, alkalinity, total dissolved solids and Ca2+, Mg2+, Na+, K+, C032', HC03", SO,2 and CI" ions, respectively. Based on the analyses, certain parameters like sodium adsorption ratio, soluble sodium percentage, potential salinity, residual sodium carbonate, Kelly's ratio, permeability index and Gibbs ratio were also calculated. The results showed that the groundwater of study area was fresh, slightly acidic (pH 5.3-6.4) and low in TDS (35-275 mg I"1). Ground water of the study area was found suitable for irrigation, drinking and domestic purposes, since most of the parameters analyzed were within the WHO recommended values for drinking water. High concentration of N03" and CI' was reported in areas with extensive agriculture and rapid urbanization. Ion-exchange, weathering, oxidation and dissolution of minerals were major geochemical processes governing the groundwater evolution in study area. Gibb's diagram showed that all the samples fell in the rock dominance field. Based on evaluation, it is clear that groundwater quality of the study area was suitable for both domestic and irrigation purposes. © Triveni Enterprises,Lucknow(India).

Islam M.J.,Hajee Mohammad Danesh Science and Technology University | Hakim M.A.,Hajee Mohammad Danesh Science and Technology University | Hakim M.A.,University Putra Malaysia | Hanafi M.M.,University Putra Malaysia | And 6 more authors.
Life Science Journal | Year: 2014

The chemical analysis of 44 groundwater samples in the northern Bangladesh has been evaluated to determine the hydrogeochemical processes and major ions, heavy and rare metal concentration for its suitability for agricultural and domestic purposes. The quality analysis is performed through the estimation of pH, EC, cations (Ca2+, Mg2+, Na+, K+, Zn2+, Cu2+, Mn2+, Fe3+ and As3+), anions (CO3 2-, HCO3 -, NO3 -, SO4 2-, PO4 3- and Cl-) and TDS (total dissolved solids). We also computed several variables such as SAR (sodium adsorption ratio), SSP (soluble sodium percentage) RSC (residual sodium carbonate), potential salinity, permeability index, Kelly's ratio, Gibbs ratio and hardness to evaluate the suitability of groundwater supply for specific uses. From the geochemical results, it has been found that both the cations and anions varied in the groundwater. Among the chemical budget of ions, magnesium and chloride were found to be the most predominant ions. The intense agricultural activities may be an important factor for the higher concentration of nitrates in these aquifers. Based on the total hardness, most groundwaters are moderately hard. According to EC and SAR the most dominant class is C1-S1. The major ion concentrations are below the acceptable level for drinking water. The salinity hazard is low thus, there is less chances to increase of toxic salt concentrations. Gibbs diagram indicates that all the samples fall in the precipitation dominance field. Regarding cation and anion constituents, groundwater is suitable for irrigation and drinking purposes except of few wells.

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