Vol. 11, Issue 9 (2022)

Author(s):
Ashish, Dr. Deepti Patel, Dr. Hemant Kumar Panigrahi, Michi Tani and Maksudan

Abstract:
The present investigation entitled“Studies on the influence of plant growth regulators and bio-inoculants on seed germination and seedling growth of papaya (Carica papaya L.) cv. Red Lady under net tunnel” was carried out during the year 2020-21 at Center of Excellence on Protected Cultivation and Precision Farming, Indira Gandhi Krishi Vishwavidyalaya, Raipur, Chhattisgarh. The experiment was laid out in Completely Randomized Design and replicated thrice. Among the various treatments, application of GA₃ @ 300 ppm took shortest days to seed germination (13.80) and performed better seedling emergence (54.16%), germination percentage (85.17%), germination index (2.16), seedling vigour index I (2140.95) and seedling vigour index II (129.01) respectively. Sapling height (8.42, 12.94 and 24.96 cm at 30, 45, and 60 days, respectively), number of leaves (6.79, 8.96 and 11.71 cm at 30, 45 and 60 days, respectively), shoot length (3.52, 6.01 and 11.52 at 30, 45 and 60 days, respectively), fresh weight (14.77 g) and dry weight of sapling (1.49 g), number of roots per sapling (83.70), fresh weight (2.51 g) and dry weight of root (0.39 g), length of longest root (24.21cm), number of primary root (9.15) and secondary roots (74.98), and root diameter (1.25) was obtained best under GA₃ @ 300 ppm. Similarly, GA₃ @ 300 ppm delivered the most effective economical performance among the different treatments.