Author(s):

Dhanshri P Ladhi, Dr. VU Raut, Akshay A Thakare, Aishwarya R Ingole and Aniket L Bijewar

Abstract: A study was conducted to evaluate the effect of foliar spray GA₃ and KNO₃ on growth and yield of tuberose at horticulture section, college of Agriculture, Nagpur, Dr. PDKV, Akola, India, in 2019-2020. Randomized Block Design was used consisting fifteen treatments and three replications. Treatments were T₁ - GA₃ 100 ppm, T₂ - GA₃ 200 ppm, T₃ - GA₃ 300 ppm, T₄ - KNO₃ 1 %, T₅ - KNO₃ 1.5 %, T₆ - KNO₃ 2 %, T₇ - GA₃ 100 ppm + KNO₃ 1%, T₈ - GA₃ 100 ppm + KNO₃ 1.5 %, T₉ - GA₃ 100 ppm + KNO₃ 2%, T₁₀ - GA₃ 200 ppm + KNO₃ 1%, T₁₁ - GA₃ 200 ppm + KNO₃ 1.5%, T₁₂ - GA₃ 200 ppm + KNO₃ 2%, T₁₃ - GA₃ 300 ppm + KNO₃ 1%, T₁₄ - GA₃ 300 ppm + KNO₃ 1.5%, T₁₅ - GA₃ 300 ppm + KNO₃ 2%. The results of the present investigation indicated that, significantly maximum vegetative growth of tuberose in respect of plant height at 30 DAS (35.18 cm), 60 DAS (46.23 cm), 90 DAS (55.80 cm), 120 DAS (60.58 cm), number of leaves plant^-1 at 30 DAS (33.40), 60 DAS (46.13), 90 DAS (56.80), 120 DAS (66.69), and leaf area (48.87 cm) were recorded maximum with application of (T₁₁) GA₃ 200 ppm + KNO₃ 1.5%. The yield parameters viz., spikes plant^-1 (6.67), spikes plot^-1 (74.67), spikes ha^-1, florets spike^-1, in tuberose were recorded maximum with the treatment of (T₁₁) GA₃ 200 ppm + KNO₃ 1.5% and it found minimum in (T₄) KNO₃ 1.5 %.

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