PERFORMANCE OF BLACKGRAM (VIGNA MUNGO L.) IN PRESENCE AND ABSENCE OF BRADYRHIZOBIUM

Abstract

The experiment was conducted at the net house of Soil Science Division of Bangladesh Agricultural Research institute (BARI), Joydebpur, Gazipur-170l during the period from September to December 2011 to study the performance of three blackgram varieties with and without Bradyrhizobium inociulant. There were 15 treatment combinations and 3 replications were laid out in 45 pots in the experiment arranged in factorial randomized complete block design. The Bradyrhizobium strains of blackgram BARI RVm-301, BARI RVm-302, BARI RVm-303 and mixed culture along with a uninoculated control were used for the above experiment. The selected varieties were BARI Mash-I, BARI Mash-2 and BARI Mash-3. All the varieties showed better performance in presence of Bradvrhizohium inoculation. Among the three varieties. BARI Mash-2 gave the highest seed yield. Bradyrhizobium strains performed better than uninoculated treatment in respect of different parameters like nodule number and weight, root weight and shoot weight, root length and shoot length, pod length and pods plant". Bradvrhizobium inoculation significantly increased nodule number and weight, seed yield, stover yield, plant height. 1000-seed weight, pods plant", seeds pod". N content in seed and stover, N uptake by stover and seed. Among the three strains and mixed culture, strain BARI RVm-302 gave the highest nodule biomass and seed yield. Interaction effects revealed with BARI Mash-2 inoculated with mixed culture gave the highest seed yield and N uptake while non-inoculated BARI Mash-I gave the lowest seed yield.