Effect of seed priming on germination and seedling growth of Bael (Aegle marmelos Corr.)
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Date
2021-09
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CCSHAU, Hisar
Abstract
The study entitled, “Effect of seed priming on germination and seedling growth of bael (Aegle marmelos Corr.)” was conducted during 2020-21 at the Nursery and Laboratory, Horticulture and Microbiology, Regional Research Station Bawal, CCS Haryana Agricultural University with objective to study the effect of seed priming with bio-inoculants and chemicals on germination and seedling growth in bael. There were 15 treatments of seed priming i.e. control, IBA @ 100 ppm for 24 hours, IBA @ 50 ppm for 24 hours, GA3 @ 100 ppm for 24 hours, GA3 @ 50 ppm for 24 hours, NAA @ 100 ppm for 24 hours, NAA @ 50 ppm for 24 hours, KNO3 @ 1 per cent for 24 hours, hot water for 30 minutes, Azotobacter (HT 54) for 30 minutes, Trichoderma viride for 30 minutes, Rhizobium (CK 16) for 30 minutes, PSB (P 36) for 30 minutes, nitric acid for 3 minutes, sulphuric acid for 3 minutes. Among different seed priming treatments, gibberellic acid @ 100 ppm for 24 hours performed best in term of germination (83.3 %), seedling length (12.2 cm), maximum dry weight per seedling (153.2 mg), vigour index I (976) and II (12256). Maximum seed viability (90%), was recorded with GA3 @ 100 ppm for 24 hours) and KNO3 @ 1.0% for 24 hours. However shortest germination time (12.7 days) was recorded with sulphuric acid for 3 minutes in agar medium at 28 ⁰C under laboratory conditions. The performance of seed priming treatments under nursery conditions was recorded best in gibberellic acid soaking @ 100 ppm for 24 hours, it resulted into highest germination (74.07%), seedling height (20.69 cm), inter-nodal length (2.83 cm), number of leaves/plant (20.75), leaf area (39.55 cm2), fresh weight of roots (12.20 g), dry weight of roots (4.88 g), fresh weight of shoots (31.55 g) and dry weight of shoots (9.12 g). Maximum seedling diameter (6.04 mm) and survival per cent (96.47%) were recorded in KNO3 @ 1 per cent for 24 hours and IBA @ 100 ppm for 24 hours respectively. Days to emergence of seedling was recorded minimum (6.00 days) in sulphuric acid for 3 minutes, however, it was recorded highest in control.