PERFORMANCE OF GROUNDNUT VARIETIES UNDER SALT STRESS CONDITIONS

Abstract

A pot experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during February to July 2020 to study the performance of groundnut varieties under salt stress conditions. The study was conducted by following Randomized Complete Block Design with three replications and consisted of two factors i.e. variety (factor A) and salinity (factor B). Fourteen groundnut variety e.g. BINA Chinabadam-4 (V 1 ), BINA Chinabadam-5 (V 2 ), BINA Chinabadam-6 (V ii

3 ), BINA Chinabadam-8 (V ), BINA Chinabadam-9 (V 5 ), BINA Chinabadam-10 (V 6 ), Dhaka-1 (V ), BARI Chinabadam-5 (V 8 ), BARI Chinabadam-6 (V 9 ), BARI Chinabadam-8 (V ), BARI Chinabadam-9 (V 10 ), BARI Chinabadam-10 (V 11 ), Zhingabadam (V ) and Bashanti (V 14 ) were grown in three levels of salinity such as 0 mM NaCl (S 0 13 7 9 ), 50 mM NaCl (S ) and 100 mM NaCl (S ). Different levels of salinity were induced to the pots at 30, 40 and 45 DAP. Experimental result revealed that the BINA Chinabadam-9 produced the highest seed and pod yield compared with other groundnut varieties under controlled and saline conditions. However, exposure of salinity decreased yield of groundnut by decreasing growth, pod number, pod weight, seed number and seed yield. Compared with controlled conditions, the highest seed and stover yield reduction was observed in BINA Chinabadam-5 and BARI Chinabadam-10. Exposure of 50 mM NaCl decreased seed yield by 52% and stover yield by 28% of BINA Chinabadam-5 variety when compared with untreated control. Under 100 mM NaCl, the highest seed yield reduction was recorded in BINA Chinabadam-5 (80%). Bashanti showed lowest yield reduction under 50 mM and 100 mM NaCl-stressed conditions. Considering the yield and yield reduction performances under saline conditions, Bashanti is most salt tolerant variety and BINA Chinabadam-5 is most salt sensitive variety.