摘要：The experiment was conducted at research field of Agricultural Research Station, BARI, Comilla during November 2012 to June 2013 with a view to find out economic fertilizer dose for potato- hybrid maize relay cropping system. The potato variety BARI Alu-7 and the maize variety BARI Hybrid Maize-7 were used. Seven fertilizer combinations viz. T 1 = Farmers fertilizer dose of potato (FFDP) + without additional fertilizer for maize (WAFM), T 2 = FFDP + 100% N of recommended fertilizer dose of hybrid maize (RFDM), T 3 = FFDP + 100% N & 25% others of RFDM, T 4 = FFDP + 100% N & 50% others of RFDM, T 5 = Recommended fertilizer dose of potato (RFDP) +100% N of RFDM, T 6 = RFDP +100% N & 25% others of RFDM and T 7 = RFDP +100% N & 50% others of RFDM were tested on potato-hybrid maize relay cropping system. Farmer’s fertilizer dose for potato was 504-162-309 kg ha -1 NPK. Recommended fertilizer dose for potato and hybrid maize was 198-44-194-24-6-1.2 kg ha -1 NPKSZnB and 255-55-140-40-6-2 kgha -1 NPKSZnB, respectively. The highest potato equivalent yield (37.80 t ha -1 ) and gross return (4,53,600 Tk. ha -1 ) were obtained from T 3 treatment. But the maximum gross margin (Tk. 3,03,075 Tk. ha -1 ) was found from treatment T 1 and the highest benefit cost ratio (3.14) was observed in T 5 whichwas close to T 1 (3.06) and T 6 (3.0) . The results revealed that recommended fertilizer dose of potato and 100% N from recommended fertilizer dose of hybrid maize might be used for potato hybrid maize relay cropping system for getting higher economic return at Comilla region. Bangladesh Agron. J. 2014, 17(2): 9-13
