EFFECT OF BIO-FERTILIZER ON YIELD AND SEED QUALITY OF BLACKGRAM WITH COMBINATION OF NITROGEN AND PHOSPHORUS

Abstract

The experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka-1207 during the period from March 2019 to June 2019 to observe the effect of bio-fertilizer on yield and seed quality of blackgram with combination of nitrogen and phosphorus. The experiment consisted of two factors viz. Factor A: two bio-fertilizer levels; (i) B = Without bio-fertilizer (control) and (ii) B 1 ii 0 = With bio-fertilizer and Factor B: Five N+P levels; F = Control (without N+P fertilizer), F = 40% lower than recommended doses of N+P fertilizer, F 2 1 = 20% lower than recommended doses of N+P fertilizer, F = recommended doses of N+P fertilizer, F 4 = 20% higher than recommended doses of N+P fertilizer and F 5 =

40% higher than recommended doses of N+P fertilizer. The experiment was conducted in split-plot design with three replications. A significant variation among the treatments was found while biofertilizer application and different levels

of N+P fertilizers applied in different combinations. The maximum number of pods plant -1 (38.52), pod length (4.22 cm), number of seeds pod -1 (6.50), 1000-seed weight (44.05 g), seed yield (1.76 t ha -1 ), stover yield (3.40 t ha -1 ) and biological yield (5.16 t ha -1 ) were obtained from the treatment combination of B 1 F but the highest harvest index (34.28%) was obtained from the treatment combination of B 3 1 F whereas the lowest was from the treatment combination of B 0 F 0 2 . Considering seed quality parameters, all the parameters were significantly affected by combined effect of biofertilizer

and N+P treatments. The highest percent germination (94.70%) and shoot length (25.40 cm) were obtained from the treatment combination of B but the highest root length (10.86 cm) and dry weight plant -1 (0.15 g) and also lowest electrical conductivity (7.83) were obtained from the treatment combination of B 1 F compared to all other treatment combinations. As a result, it can be accomplished that application of bio-fertilizer and N+P treatment combination B 1 F 3 4 is very much effective for higher yield and better seed quality of blackgram.