Effect of Biochar and Bio-inoculants on Yield, Nutrient Content and Uptake of Mungbean

A field experiment was conducted to study the effect of biochar and bio-inoculants on yield attributes and yield of mungbean, and to assess the impact of biochar and bio-inoculants on nutrient content and uptake by mungbean during Kharif 2024, at the Instructional Farm, SKNAU. Variety RMG-492 was used for the experiment at seed rate of 15 Kg ha⁻1. The experiment consisted of treatments having 4 levels of biochar (control, 2, 4 and 6-ton ha⁻¹ biochar) and four treatments of bio-inoculants (Control, Rhizobium, PSB and Rhizobium + PSB) total of 16 treatment combinations were laid out in factorial randomized block design and replicated thrice. Mungbean variety RMG-492 was taken as a test crop. The experimental results indicated that the application of 6-ton ha⁻¹ biochar significantly increased test weight (36.97 g), seed yield (1266 Kg ha⁻¹), stover yield (2652 Kg ha⁻¹) and biological yield (3918 Kg ha⁻¹) of mungbean over the control. The content of N, P and K in seed and stover and their uptake by mungbean were observed to be significantly increased with the application of 6-ton ha⁻¹ biochar over that under control. Results further indicated that dual inoculation of Rhizobium+ PSB significantly increased the seed yield (1247Kg ha⁻¹), stover yield (2570 Kg ha⁻¹), biological yield (3795 Kg ha⁻¹) and test weight (35.63 g) over control. Maximum N, P and K content and their uptake in seed and stover of mungbean were recorded under the co-inoculation of Rhizobium+PSB. The interactive effect of different levels of biochar and bioinoculants on seed and stover yield of mungbean was statistically significant. A consistent increase in yield was observed with the combined application of biochar and bioinoculants. The interactive effects of biochar and bioinoculants on nutrient content and uptake in mungbean seed and stover were also statistically significant.