Author(s):

Navdeep Singh and Dr. Daljeet Singh

Abstract: This scrutiny was conducted to ascertain the effect of plant growth-promoting bacteria on seed germination, seedling vigor and growth of Cucumis sativus L. was conducted during Kharif season of 2018-2019, 2019-20 at the University Farm, University College of Agriculture, Talwandi Sabo, Bathinda (Punjab). The experiment was laid out in RBD design with three replications. The crops were sown in poly-bags with a capacity of 10 kg which is filled with mixture formaldehyde sterilized coarse sandy loam soil and poly-bags are arranged according to the treatments and at a recommended spacing of crops. Different strains of bacteria, Serratia marcescens MTCC 10241 + Bacillus subtilis MTCC7611 + Bacillus subtilis MTCC8141, were used alone, mixer as a bio-priming agent with RDF 50% and 100% in the field conditions. A total of seven treatments are crafted included control (water-soaked) treatment. The treatment RDF 50% + Serratia marcescens MTCC 10241 + Bacillus subtilis MTCC7611 + Bacillus subtilis MTCC8141 significantly affects the seed germination percentage, seedling vigor, vine length, number of nodes on the main axis, number of leaves, leaf area and days to first fruit set in cucumber crop from other treatments. The highest number of primary branches per vine in cucumber obtained from RDF 100% + Serratia marcescens MTCC 10241 + Bacillus subtilis MTCC7611 + Bacillus subtilis MTCC8141 treatment as compared to that of the other treatments. It was concluded from study that PGPR with 50% RDF significantly improved the seed germination percentage, seedling vigor and growth parameters of cucumber crop.

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