Assessing The Hazardous Impacts Of Chromium On Growth And Yield Of Boro Rice

The experiment was conducted at the net house of Agro-environmental Chemistry Laboratory of the Department of Agricultural Chemistry of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, Bangladesh during the period from December 2016 to May 2017. The study was undertaken to evaluatethe toxic effect of chromium on growth, yield and nutritional attributes of BRRI dhan69 and BRRI dhan74. The experiment comprised of two factors, Factor A: two rice cultivars i.e. V₁= BRRI dhan69, V₂= BRRI dhan74; and six levels of Cr application i.e. T₁= 0 mg Cr/kg soil, T₂= 12.5 mg Cr/kg soil, T₃= 25 mg Cr/kg soil, T₄= 50 mg Cr/kg soil, T₅= 75 mg Cr/kg soil, T₆ =100 mg Cr/kg soil. The experiment was laid out in Completely Randomized Design (CRD) with four replications.  Data on different growth parameters, yield attributes, yield and Cr contents were recorded and analyzed. The control treatment attributed the highest values of vegetative growth, yield and yield contributing character, and nutrient content (P, K, S and Na) with V₂ variety. Data revealed that the tallest plant was found in T₁V₁ and shortest plant was found in T₆V₁ combination also similar trends found in other character. The grain yield of rice ranges from 5.02 t ha^-1 to 8.13 t ha^-1 while T₁V₂ produced the highest grains yield and T₁V₆ produced lowest grains yield. The highest chromium content was found in T₆V₂. In case of root, there was no value of chromium was found. This might be due to that, applied chromium was transferred from root to grain and straw.

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