EFFECT OF PHOSPHORUS, MOLYBDENUM AND Rhizobium INOCULATION ON GROWTH AND NODULATION OF MUNGBEAN

Abstract

Bhuiyan M.M.H., Rahman M.M., Afroze F., Sutradhar G.N.C., and Bhuiyan M.S.I. 2008. Effect of Phosphorus, Molybdenum and Rhizobium Inoculation on Growth and Nodulation of Mungbean. J .Soil .Nature. 2(2): 25-30 A pot experiment was conducted during Kharif, 2005 at the Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur. There were four levels of phosphorus (P) (0, 20, 40, 60 kg/ha) and 2 levels of molybdenum (Mo) (1.0 and 1.5 kg/ha) having a common Rhizobium inoculant, one control with no Rhizobium or fertilization and a Rhizobium inoculation only were applied. The performance of Rhizobium inoculant alone was superior to control in almost all parameters of the crop studied. Rhizobium inoculation along with P and Mo significantly increased the growth of plants, number of nodules, dry matter production as well as grain yield of mungbean significantly compared to uninoculated control. Nodulation (nodule number/plant) was the highest with 20 kg P/ha and 1.0 kg Mo/ha. However, P and Mo application at the rate of 40 kg P/ha and 1.0 kg Mo/ha progressively and significantly increased dry matter content of shoot and root of mungbean. Seed yield/plant was positively correlated with the number of nodules/plant. From this point of view, nodule number/plant with 20 kg P/ha and 1.0 kg Mo/ha, and yield and attributes of mungbean combined application of Rhizobium inoculant with 40 kg P/ha and 1.0 kg Mo/ha was considered to be the balanced and suitable combination of fertilizer nutrients for achieving the maximum output through cultivation of mungbean.