PERFORMANCE OF RICE CULTIVARS TO DIFFERENT CONCENTRATIONS OF ARSENIC AT SEEDLING STAGE

Abstract

A two factorial tray experiment was conducted in the net house of the Department of Agricultural Chemistry, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka-1207, during November 2017 to January 2018, to study the performance of rice cultivars to different concentrations of arsenic at seedling stage. Factor A: different doses of arsenic [As 0 = No arsenic added (control), As iv

1 = 3 ppm arsenic, As = 6 ppm arsenic, As 3 = 9 ppm arsenic and As = 12 ppm arsenic (soil water basis)] and Factor B: different rice cultivars [T 4 1 = BINA dhan-8, T = BINA dhan-10, T 3 = BINA dhan-14, T 4 = BINA dhan-18, T

= BR 14, T 7 = BR 16, T 8 = BRRI dhan28, T 9 5 2 2 = BR 3, T = BRRI dhan29, T = BRRI dhan36, T 11 = BRRI dhan45, T 12 = BRRI dhan47, T = BRRI dhan50, T 14 = BRRI dhan55, T 15 = BRRI dhan58, T = BRRI dhan59, T 17 = BRRI dhan60 and T 18 16 = BRRI dhan61]. Different growth and yield parameters varied significantly due to difference in the doses of arsenic. Arsenic toxicity adversely affects all the growth and yield related attributes of all rice cultivars. BINA dhan-18 produced highest seedling height and BRRI dhan29 produced the lowest. BRRI dhan-61 produced highest shoot weight and BR 3 produced the lowest. BINA dhan-18 produced maximum root length and BRRI dhan45 produced the lowest. BRRI dhan29 produced maximum root weight and BR 3 produced the minimum. BRRI dhan29 produced maximum total dry matter and BR 3 produced minimum. BRRI dhan29 contained maximum N in shoot and BINA dhan-10 contained the minimum. BRRI dhan61 contained maximum P in shoot and BR 3 contained the minimum. BRRI dhan61 contained maximum K in shoot and BR 3 contained the minimum. BRRI dhan29 contained maximum N in root and BINA dhan-8 contained the minimum. BRRI dhan61 contained maximum P in root and BR 3 contained the minimum. BRRI dhan61 contained maximum K in root and BR 3contained the minimum.