Vol. 9, Issue 6, Part J (2025)

The current study entitled “Effect of different PGRs and chemicals on seed germination of Jackfruit (Artocarpus heterophyllus Lam.)’’ was carried out at the research cum instructional farm of Department of Fruit Science, Pt. K.L.S. College of Horticulture and Research Station, Rajnandgaon (C.G.). during the kharif season of 2023-24 in completely randomized design and replicated thrice with a total of 13 treatments viz., T₀ direct sowing control, T₁ NAA @ 100 ppm seed soaking for 12 hr., T₂ NAA @ 150 ppm seed soaking for 12 hr., T₃ NAA @ 200 ppm seed soaking for 12 hr., T₄ GA₃ @ 100 ppm seed soaking for 12 hr., T₅ GA₃ @ 150 ppm seed soaking for 12 hr., T₆ GA₃ @ 200 ppm seed soaking for 12 hr., T₇ KNO₃ @ 0.5% seed soaking for 3 hr., T₈ KNO₃ @ 1% seed soaking for 3 hr., T₉ KNO₃ @ 1.5% seed soaking for 3 hr., T₁₀ Thiourea @ 0.5% seed soaking for 1 hr., T₁₁ Thiourea @ 1% seed soaking for 1 hr., T₁₁ Thiourea @ 1.5% seed soaking for 12 hr. The various observations of different aspects recorded for the seed germination and growth of Jackfruit were as follows: Number of days taken for germination, germination percentage (%), height of plant (cm), plant girth (mm), Number of leaves per plant, length of root per seedling (cm) and vigour index-I. The results showed that minimum number of days taken for seed germination (9.93 days) and maximum germination percentage (28.73%, 41.71%, and 82.83%,) at 10, 20 and 30 DAS were recorded in treatment T₆-GA₃ @ 200 ppm seed soaking for 12 hr. Regarding seedling growth parameters, T₆ recorded significantly higher in plant height (59.39 cm), plant girth (10.13 mm), number of leaves (12.31), leaf area (63.45 cm²), number of roots (42.71), root length (19.47 cm), vigour index-I (6560.80 cm). T₆ recorded the maximum among all the other treatments. The minimum values for all seedling growth parameters were recorded in T_0-direct seed sowing (control).