GROWTH AND YIELD RESPONSE OF BLACKGRAM TO RHIZOBIUM INOCULATION AND FERTILIZATION

Abstract

The experiment was conducted in the farm of Sher-e-Bangla Agriculthral University, Dhaka, Bangladesh during the period from March to May 2007to study the effect of inoculation and fertilization on the growth and yield of blaekgrain. The treatments of the experiment were as T 1 : Control (No inoculation and fertilization), T 2: 20 kg N hr'. T 3 : 40 kg P2O hr'. 14 : 30 kg K20 hr. T: 20 kg N hr - 40 kg P 20 5 hr', T3 : 40 kg P 205 hr1 + 30 kg K 2 0 hr', T,: 20 kg N hzr' 40 kg PO 5 ha 30 kg K20 hr'. T8 : RIn:ohium inoculation. 19: Tthi:ohium inoculation -r 20 kg N hr'. T Rhizobium inoculation 40 kg P 2 O hr'. T 1 : Rhcobium inoculation + 30 kg K 2 0 hr'. T, 2 : Rhzzohmnz inoculation -F 20 kg N hr' -F 40 kg P:Os hr'. T 1 : Rhi:ohirm; inoculation - 40 kg P 205 ha + 30 kg K 2 0 hr'. T 14 : RIzi;ohiwn inoculation ± 20 kg N hr' 40 kg 1 12 0 hr - 30 kg K2 0 hr'. The single fhctor experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Results obtained from the experiment revealed that a package of Rhizobium inoculant along with N, P 2 0 and K 2 0 at the rate of 20 kg hr . 40 kg lia -1 and 30 kg ha' respectivclv improved the growth characters like plant height, leaves planr. dry weight plant. nodules planr 1 . (' pods planr'. pod tcngth. seeds poth' and 1000 seed weight. Eventually the seed yield was maximized OR. RGR and yield characters like flower planr 1 . (1.48 t hr') and verified with higher value olharvest index (25.90 %). Seed yield was 47.83 % higher than that of control plot where as no Rhizobium inoculant and fertilizer were given.