EFFECT OF PHOSPHORUS ON THE NODULATION, GROWTH AND YIELD OF MUNGBEAN

Abstract

An experiment was conducted at the field laboratory of the Department of Soil Science, Hajee Mohammad Danesh Science and Technology University, Dinajpur, during kharif season (March to June) of 2011 to find out the effect of phosphorus on the nodulation and yield of mungbean (Vigna radita). Six different levels of phosphorus were used as treatment viz.,T, = 10 kg POs; /ha, T, = 20 kg P2Os /ha , T; = 30 kg P.O; /ha, Ty = 40 kg P.O; /ha ,T; = 50 kg P.O; /ha ,Ts= 60 kg P2Os /ha and To = control (no application of phosphorus). The phosphorus was applied in the form of triple super phosphate as per experimental specification. The experimental results revealed that plant height, root length, number of nodules plant-', nodule dry weight, shoot dry weight plant”, root dry weight plant’, number of pods plant”, pod length, number of seeds pod™', 1000-seeds weight, seed yield, nitrogen uptake and protein content in the plant were significantly influenced by phosphorus. The highest number of nodules 22.98 and 31.5 at 30 and 50 days after sowing (DAS) was found respectively in T, treatment which was closely followed by treatments Ts ,T. and the lowest number of nodules (9.33 at 30 DAS and 14.08 at 50 DAS) was found in To (control). Grain yield of mungbean was significantly influenced with the application of phosphorus. It was found that the application of 40 kg P2Os ha: 1 produced the highest grain yield (1234 kg ha‘) and the control treatment produced the lowest grain yield (756.1 kg ha"). The findings of the study showed that the performance of the treatment Ts was the best among other treatments in respects of nodulation, growth and yield of mungbean. Therefore 40 kg P2Os ha is recommended for mungbean cultivation.