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Growth and Mineral Nutrition of Rice (oryza Sativa L.) Grown on Tannery Effluent Polluted Soil Amended with Cowdung and Lime

N Afrida
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh

AS Chamon
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh

MK Hossain
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh

GA Shimi
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh

MN Mondol
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh

Abstract/ Executive Summary:

Pot experiments were carried out with rice (Oryza sativa L.) to evaluate the plant response of different amendments to ameliorate heavy metal toxicity. Cowdung and lime were applied at the rate of 10 tons/ha. Both cowdung and lime application led to an increase in the growth of rice and significant reductions of Zn, Ni, Cu, and Cr in plants. The length, fresh and dry weight, and N, P, K, Na, Ca, and Mg concentrations in rice plants were increased significantly. The concentrations of Cu, Zn, Ni, Pb, and Cr in rice grown on contaminated soils were significantly higher as compared to the control. Cowdung and lime significantly reduced Cu, Zn, Ni, Pb, and Cr concentrations in comparison to control. Chromium concentrations in lime-treated plants were reduced by 57.89% in rice as compared to cowdung. Lime proved to be more efficient in reducing the concentration of metals in rice plants.

Keywords: Cowdung, Chromium, Hazaribagh, Lime, Cowdung.

Location: Shudkhira village in Jamirta union of Singair upazilla at Manikganj District.

Start Date:

End Date:

Program Area: Quality and Nutrition

Commodity: Rice, Contamination of soil, Liming

Objectives:

To prevent heavy metal accumulation in rice plants (Bridhan-58) grown in Hazaribagh tannery area soil.

Methodology:

The soil sample was collected from the Hazaribagh tannery area and Rice (Oryza sativa L.) (BR-58) was selected as the test crop. The soil series around Hazaribagh belonging to Khaler Char remains seasonally flooded, up to 120-150 cm deep for more than 6 months and they are poorly to very poorly drained soils, developed in mainly medium-textured Brahmaputra alluvium in permanently wet channels or depression on the old and young Brahmaputra, Meghna, and Jamuna floodplains. The area inside the embankment is just organic wastes, on Jamuna alluvium, permanently wet by the effluents of the tannery factories. The normal soil sample was collected from Shudkhira village in Jamirta union of Singair upazilla at Manikganj District. Soil samples (0-15 cm depth) were collected from both Hazaribagh (contaminated soil) and Singair (uncontaminated soil). The soil samples collected were air-dried, ground, and screened to pass through a 5 mm sieve for pot experiment and 2.0 mm and 0.5 mm sieve for physical and chemical analyses. There were 4 treatments (T₁, T₂, T_3, and T₄) and three replication. Plastic pots were filled with 4 kg soil and basal dose of fertilizers as urea, TSP, and muriate of potash were added at the medium rate for rice (BARC 2012). Three plants of two weeks old were allowed to grow in each pot. The pots were arranged in a completely randomized design. The plants were irrigated with distilled water whenever required. The crops were harvested after two months of transplantation. Soil samples were digested with HCl plus HNO₃ (3:1) mixture (Blum 1996) under a closed system. 0.5g of finely ground plant sample was weighed and digested with 10 ml conc. HNO₃ and 2 ml conc. HClO₄. Elements in the extracts (50 ml) were measured by atomic absorption spectrophotometer (AAS) (Varian, AA-240). The data were statistically analyzed by Duncan’s Multiple Range Test (DMRT) in IBM SPSS statistics version 20 (Gomez and Gomez 1984).

Source of Information: J. biodivers. conserv. bioresour. manag. 6(2), 2020

Article Link (Online Journal): DOI: https://doi.org/10.3329/jbcbm.v6i2.55246

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Application of lime and cowdung reduced the metal toxicity of the soil. The lime and cowdung reduced the mobility of heavy metals thus reducing its uptake to rice plants

Knowledge Management: Journal