GROWTH ATTRIBUTES, YIELD AND YIELD ATTRIBUTES AFFECTED BY ORGANIC BIOFERTILIZERS AND DIFFERENT GROWTH REGULATORS OF INDIAN MUSTARD (BRASSICA JUNCEA L.) FOR SUSTAINABLE AGRICULTURE

Abstract

A field experiment was conducted during 2019–20 and 2020-21 at Crop Research Farm at SamHigginbottom University of Agriculture Technology and Sciences, Prayagraj, Uttar Pradesh, India.Sixteen treatments, comprising biofertilizer viz., Azotobacter (B1) Phosphate Solubilizing Bacteria+ Azotobacter (B2), Vesicular Arbuscular Mycorrhiza + Azotobacter (B3) and PhosphateSolubilizing Bacteria + Vesicular Arbuscular Mycorrhiza + Azotobacter (B4), growth regulators viz.,Water Spray(G0), Gibberellic acid 50 ppm (0.05 g/l) (G1), Salicyclic acid 100 ppm (0.01 g/l) (G2) andIndole acetic acid 50 ppm (0.05 g/l) (G3) and were replicated 3 times in split plot design. Growthattributes viz., leaf area (269.172 and 266.250 at 80 DAS during 2019-20) and (267.213 and 266.496 atharvest during 2020-21) and Leaf Area Index (LAI)(0.897 and 0.888 at 80 DAS during 2019-20) and(0.891 and 0.888 at harvest during 2020-21) under the treatment (B4) Phosphate Solubilizing Bacteria+ Vesicular Arbuscular Mycorrhiza + Azotobacter, respectively. Crop yield viz., seed yield (1.943and 2.034 t/ha) and stover yield (6.747 and 6.964) significantly higher were recorded during theyears 2019-20 and 2020-21 in treatment combination B4 (PSB + VAM +Azotobacter), respectively.Growth regulators recorded the higher seed yield (1.842 and 1.978 t/ha) and stover yield (6.768 and6.954 t/ha) during the years 2019-20 and 2020-21, respectively in the treatment G1 [Gibberellic acid50 ppm (0.05 g/l)]. Growth attributes viz., leaf area (257.589 and 256.500 at 80 DAS during 2019-20)and (258.991 and 256.922 at harvest during 2020-21) and LAI (0.859 and 0.855 at 80 DAS during 2019-20) and (0.863 and 0.856 at harvest during 2020-21) under the treatment G1 [Gibberellic acid 50 ppm(0.05 g/l)], respectively.