Vol. 9, Special Issue 12, Part A (2025)

A field experiment was carried out in research farm, IGKV, Raipur, Chhattisgarh, India during kharif 2023 and 2024 to know the Performance of bio-stimulant on growth and yield of rice in Vertisol of Chhattisgarh. It was laid down in a randomized block design (RBD) consisting twelve treatments and three replications. The various treatment combinations included : T₁-RDF (120:60:40), T₂-RDF + Root Dipping with humic acid powder(1 g/L), T₃-RDF + humic acid powder @ 250 g/acre (SA), T₄-RDF + humic acid powder @ 500 g/acre (SA), T₅-RDF + humic acid powder @ 1000 g/acre (SA), T₆-80% RDF + Root Dipping with humic acid powder (1 g/L), T₇-80% RDF + humic acid powder @ 250 g/acre (SA), T₈-80% RDF + humic acid powder @ 500 g/acre (SA), T₉-80% RDF + humic acid powder @ 1000 g/acre (SA), T₁₀-80% RDF + humic acid powder @ 1 g/L (FS), T₁₁-80% RDF + humic acid powder @ 2 g/L (FS) and T₁₂-80% RDF + humic acid powder @ 4 g/L (FS). The results showed that combining humic acid powder with 100% RDF had a positive influence on most of the growth parameters. The treatments with RDF + humic acid powder @ 500 g/acre was able to obtained significantly higher grain yield which is directly comparable to RDF + HP @ 1000 g/acre in both the seasons. Also, the higher B:C ratio was obtained by the application of RDF + HP @ 500 g/acre followed by 80% RDF + HP @ 500 g/acre. The higher B:C ratio in RDF + HP @ 500 g/acre and 80% RDF + HP @ 500 g/acre highlights that moderate to high doses of humic acid under 80 and 100% RDF significantly improve economic returns by enhancing crop productivity.