Author(s):

Kulveer Singh Yadav, AK Pal, Anil K Singh, Deependra Yadav and Sandeep K Mauriya

Abstract: The present investigation was carried out to effect of different bio-fertilizers on growth and flowering of marigold at the Horticulture Research Farm, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, U.P. during 2015-16 and 2016-17 and pooled data of both year experiments were taken. The experiment was laid out in randomized block design with replicated three times and sixteen treatment combinations. The treatments comprised of N₂ fixer (Azotobactor), PSB (Pseudomonas + Bacillus polymyxa), RDFYM and three levels of NPK. Result raveled that growth parameter like number of primary branches/plant (13.42), secondary branches/plant (26.00), length of primary branches (58.83 cm), number of leaves/plant (408.79), leaf area (22.86 cm²), leaf area index (4.61) and spread of plant (39.14 cm) were recorded highest when plants treated with 75% NPK + N₂ fixer (Azotobactor) + PSB (Pseudomonas + Bacillus polymyxa) + RDFYM. While the minimum number of days to bud initiation (35.16 days), days to flowering (48.68 days) and maximum bud diameter (2.00 cm) were recorded with the application of 75% NPK + N₂ fixer (Azotobactor) + PSB (Pseudomonas + Bacillus polymyxa) + RDFYM, whereas maximum bud length (2.41 cm) was measured with application of 75% NPK + N₂ fixer (Azotobactor) + PSB (Pseudomonas + Bacillus polymyxa). The greater diameter of flower (6.39 cm) was measured with 75% NPK + N₂ fixer (Azotobactor) + PSB (Pseudomonas + Bacillus polymyxa) + RDFYM and maximum duration of flowering (55.36 days) was noticed in with 75% NPK + N₂ fixer (Azotobactor) + PSB (Pseudomonas + Bacillus polymyxa) whereas, maximum flower longevity (42.74 days) was recorded with 75% NPK + N₂ fixer (Azotobactor) + PSB (Pseudomonas + Bacillus polymyxa) + RDFYM. The lowest values for growth and flowering traits were recorded in control.

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