Abstract
Background: Indigenous rhizobial populations may be unable to achieve successful symbiosis in the field due to rare population and unfavourable soil environment. Introduced plant growth promoting rhizobacteria (PGPR) are frequently linked to faster growth, development, and yield of plant with synergetic effect on indigenous Rhizobium bacteria. Furthermore, co-inoculating legumes with both Rhizobium and PGPR is proven more effective for improving nodulation as well as growth and development of legumes. Methods: The experiment was conducted at research farm of TCA, Dholi Muzaffarpur a campus of Dr. Rajendra Prasad Central Agriculture University, Pusa, Bihar during kharif season of 2021 to investigate the “Evaluation of Rhizobium along with multifunctional Rhizobacteria for improving the growth and yield of black gram [Vigna mungo (L.) Hepper]”. There were eight number of treatments and replicated thrice in a randomized block design. The treatment comprised as T1- control, T2- Rhizobium (Bradyrhizobium spp.), T3- Rhizobium + PUK-171 (Stenotrophomonas rhizophila), T4- Rhizobium + NE 10 (Bacillus cereus), T5-Rhizobium + Pseudomonas spp., T6-Rhizobium + LMSR 45 (Pantoea agglomerans), T7-Rhizobium + Methylobacterium, T8-N as per RDF. Result: The result revealed that co-inoculation of Rhizobium + PUK-171 (Stenotrophomonas rhizophila) significantly increase the plant height, number of leaves plant-1, number of branches plant‑1, plant dry weight, crop growth rate, and in nodule studies number of nodules plant-1, dry weight of nodules recoded significantly higher result as compare to T1, T2, and T8 and found at par with rest of treatment. In yield attributing character number of pods plant-1 recorded significantly higher result in co-inoculation of Rhizobium + PUK-171 (Stenotrophomonas rhizophila) and rest of character did not produce significant effect, in case of seed yield similar trends was followed, while in case of stover yield co-inoculation of Rhizobium along with Rhizobium + NE 10 (Bacillus cereus) recorded significantly higher result as compare to T1 and T8 and at par with rest of treatments. Harvest index did not produce significant effect.
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