EFFECTS OF NITROGEN, BRADYRHIZOBIUM AND MICRONUTRIENT (MOLYBDENUM AND BORON) ON MUNGBEAN (Vigna radiata L.)))

Abstract

A field experiment was conducted during March to June 2009 at the research field of Soil Science Division, Bangladesh Agricultural Research Institute 1 : Control : PKB, T 4 : Bradyrhizobium inoculant, T 5 : N, T 6 2 : PKMo, T : PKMo + Bradyrhizobium Inoculant, T : PKB + Bradyrhizobium Inoculant, T 8 : NPKMo, T 9 : NPKB, T 10 : PKMoB, T : PKMoB + Bradyrhizobium Inoculant and T : NPKMoB. After 35 and 50 days of sowing, 5 plants were uprooted from each plot in each days of nodule collection to study nodulation, dry matter production and plant growth. At maturity, yield and yield contributing characters were recorded. Bradyrhizobium inoculation significantly increased number of nodules, nodule weight, root and shoot length, seed and stover yield, yield attributes, nitrogen and protein yield of mungbean compared to non-inoculated control. Bradyrhizobium inoculation in presence of Mo and B recorded the highest nodule number and nodule weight, and also seed and stover yields. Bradyrhizobium inoculation alone or in presence of Mo or B also recorded higher nodulation over other treatment combinations. Bradyrhizobium inoculation was better than nitrogen in almost all the parameters studied. Molybdenum and boron also performed better results. This result indicated that the use of Bradyrhizobium inoculants with molybdenum and boron appeared to be an effective method for successful mungbean production.