Influence of Biofertilizers and Gibberellic Acid on Growth and Yield of Blackgram (Vigna mungo L.)

A field experiment was conducted during Zaid season 2023 at CRF, (Crop Research Farm), Department of Agronomy, Naini Agricultural Institute, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj during Zaid season of 2023. The purpose of this research is to study the Influence of Biofertilizers and Gibberellic acid on growth and yield of Blackgram. The soil of experimental plot was sandy loam in texture, Basic in soil reaction (pH 7.19), low in organic carbon (0.54%), available N (286.93 kg/ha), available P (21.67 kg/ha), available K (157.12 kg/ha). The treatments included PSB seed inoculation at 10 and 20g/1kg seeds, Rhizobium seed inoculation at 10 and 20g/1kg seeds and three levels of Gibberellic acid foliar application (50,100 and 150ppm) and control (20:40:20 NPK kg/ha) were used. The experiment was laid out in Randomized Block Design with ten treatments each replicated thrice. As a result, Maximum plant height (36.03 cm), plant dry weight (6.72 g/plant), Crop growth rate (7.08 g/m2/day), Relative growth rate (0.056 g/g/day), Maximum Pod/plants (21.85), Seeds/pod (4.42),Seed yield (1.12 t/ha), Stover yield (2.03 t/ha) Test weight (34.89 g) and Harvest index (35.63 %) were recorded. Higher Gross returns (84179.17 Rs./ha),Net returns (57761.07 Rs./ha) and Benefit Cost Ratio (2.19) were obtained with application of (PSB 10g/1kg seeds, Rhizobium 10g/1kg seeds and Gibberellic acid at 150ppm).