Author(s): Kiran Sagar DC, Shrishail M Vastrad, Shikha Saini, Mallappa and Prakash HT

Abstract: The present experiment was carried out inside the shade net house (Horticulture nursery) of ICAR, KVK- Vijayapura-1 to find out the effect of gibberellic acid (GA₃) on seed germination, seedling growth and its vigour of Indi’s Kagzi Lime. Six treatments were employed viz., T₁- control, T₂ (50 ppm GA₃₎, T₃ (100 ppm GA₃₎, T₄ (150 ppm GA₃₎, T₅ (200 ppm GA₃) and T₆ (250 ppm GA₃) and each treatment were replicated for three times. All treatments significantly performed better as compared to control. According to the results obtained, after 60 days of sowing the maximum seed germination (94.57%) with minimum number of days taken for seed germination (21 days) was observed in the treatment of T₆ i.e., 250 ppm gibberellic acid pre sowing seed treatment. Further, maximum seedling length (26.23 cm), maximum number of leaves (10.33), higher length of primary shoots (12.17 cm) and maximum number of secondary roots (23.33) were also observed in the pre sowing gibberellic acid seed treatment of T₆ (250 ppm). Therefore, pre-sowing treatment of Indi’s Kagzi Lime seeds with 250 ppm GA₃ may be recommended to the farmers than other gibberellic acid concentration to enhance seed germination percentage, rate of growth and Vigournes of seedlings leading to the production of vigorous plants which can be utilized for better nursery development, rootstock studies, commercial citrus cultivation as well as crop improvement programme.

DOI: 10.33545/26174693.2024.v8.i1e.379