EFFECTS OF CADMIUM ON GROWTH, YIELD AND NUTRiENTS CONTENT OF BRRI dhan29, BRRI dhan60 AND BRRI dhan61

Abstract

A pot experiment was conducted at the net house of the Department of Agricultural Chemistry of Sher-e-Bangla Agricultural University. Dhaka-1207 during the Boro season from November, 2015 to May. 2016 to evaluate the effects of cadmium on growth, yield and nutrients content of three different Born rice cultivars. The two factorial experiment was laid out in a completely randomized design (CR1)) with three replications. Factor A: three varieties [Vi-BRRI dhan29, V2-BRRI dhan60 and Va-BRRI dhan6l ] and factor B: five doses of cadmium [To No cadmium applied). Ti 20 ppm Cd T240 ppm Cd. T3=60 ppm Cd, T4=80 ppm Cd]. Cadmium was added from cadmium sulphate (3CdSO4.8H20). Soils were treated with Cd as per treatments before transplanting. The cultivar BRRI dhan29 showed better performance than BRRI dhan60 and BRRI dhan6l. Treatment with no cadmium (To) gave higher results in most growth, yield and yield related parameters. In case of interaction. BRRI dhan29 and the treatment with no cadmium (To) gave longer panicle (29.80 cm), the highest number of filled grains panicl& (220.7) and grain yield (6.543 t ha'). K, Na and Ca content in grain showed statistically non-significant difference due to the varietal effect in most cases. The treatment with no cadmium (To) gave higher K. Na and Ca content in grain, straw and root. Interaction of BRRI dhan6l and the treatment with no cadmium (To) gave higher K content in grain (0.4353 %), straw (5.137 %) and root (0.8133 %). Interaction of BRRI dhan6l and the treatment with no cadmium (To) gave higher Na content in grain (0.22%) while interaction of BRRI dhan60 and the treatment with no cadmium (To) gave higher Na content in straw (1.833 %) and root (1.430 %). In case of Ca content in grain, there was statistically non-significant difference due to the interaction of variety and cadmium doses. Interaction of BRRI dhan6l and the treatment with no cadmium (To) gave higher Ca content in straw (0.559 %) while interaction of BRRI dhan60 and the treatment with no cadmium (To) gave higher Ca content in root (0.346 %). Cadmium contamination significantly decreased almost all the growth, yield & yield contributing characters and nutrients content. The Cd concentration in grain, straw and root of three rice varieties increased with increasing rate of Cd addition. BRRI dhan29 had the lowest grain Cd concentration (15.35 mg kg4) and BRRI dhan60 showed the highest Cd concentration (24.43 mg kg") in grain but BRRI dhan29 had the maximum Cd content in straw (26.16 mg kg4) and root (77.29 mg kg") while BRRI dhan60 and BRRI dhan61 had comparativcly lower in straw and root.