STUDY ON THE FEASIBILITY OF REDUCING NITROGENOUS FERTILIZER THROUGH BIO-FERTILIZER ON MUNGBEAN

Abstract

A field experiment was conducted at the research farm of Sher-e-Bangla Agricultural University, during Kharif-1 (March to June), 2014 to study on the feasibility of reducing nitrogenous fertilizer use through bio-fertilizer on Mungbean. The experiment comprised with 2 factors viz. A) Variety-3: V 1 = BARI mung 5, V 2 = BARI mung 6, V = BINA mung 8; B) Bio-fertilizer and nitrogenius fertilizer combination-5: T = Recommended nitrogenous fertilizer, T 2 1 = Bio-fertilizer (120g) + 25% nitrogenous fertilizer (urea) of the recommended dose, T = Bio-fertilizer (120g) + 50% nitrogenous fertilizer (urea) of the recommended dose, T 3 = Bio-fertilizer (120g) + 75% nitrogenous fertilizer (urea) of the recommended dose, T 4 = Bio-fertilizer (120g) + 100% nitrogenous fertilizer (urea) of the recommended dose. The experiment was laid out in split plot design with three replications. Results revealed that, among all varieties BARI mung 6 gave the highest seed yield (1.58t ha 5 -1 ) which may be attributed to higher number of pods plant ( (24.54),seeds pod -1 (11.06) and 1000 seed weight (44.09g). Among bio-fertilizer doses, the treatment T 5 gave highest

seed yield (1.651 t ha -1 ) as this treatment gave highest number of pods plant -1 ( 24.90), seeds pod -1 (10.84) and 1000 seed weight (42.33g). It is also evident that T 4 , T 3 and T 1 treatment also similar with T treatment. And interaction of V 2 T 5 gave higher number of number of pods plant -1 5 (27.62), seeds pod (12.38), 1000 seed weight (46.50g), seed yield (1.84 t ha -1 ) and harvest index (32.73 %). As treatment T 5 (1.651 tha -1 ), T 4 (1.623 t ha -1 ) and T 3 (1.591 t ha -1 ) showed statistically similar seed yield. So, 50% urea can be reduced by adding bio-fertilizer with urea without sacrificing seed yield of mungbean. This is the result of single year experiment. So, for higher acceptibility of the result this experiment may be conducted in different agro-ecological zone of Bangladesh by using different types of Bio-fertilizer and varieties. -1 3 -1