Abstract
The present investigation, entitled ‘Influence of different plant growth regulators on regeneration of hardwood stem cuttings of Plum (Prunus salicina L.) cultivar Kala Amritsari’, was conducted at Punjab Agricultural University, Regional Research Station, Gurdaspur (Punjab) during the years 2023-24 and 2024-25. Pencil thickness hardwood stem cuttings of 20-25 cm in length, having more than 5 buds, were prepared from uniformly vigorous, healthy, and insect-pest & disease- free one-year-old branches of Kala Amritsari plum plants during the middle of December. The basal portion of these cuttings was dipped in different doses of plant rooting hormones, i.e., Indole-3-butyric acid(IBA)(2000,3000 &4000ppm); Indole-3-acetic acid(1000,2000&3000 ppm)(IAA), and Naphthalene acetic acid(NAA)(500,1000,1500ppm) for 2minutes and an untreated control. A unit of 100 cuttings comprised of one replication, hence a total of about 300 cuttings were used in each treatment, with three replications, and also in the control(untreated).These cuttings were planted at a distance of 20x30cm, planted in a Completely Randomized Block Design on the well-prepared raised nursery beds incorporated with a mixture of sand, soil, and farmyard manure by following recommended cultural practices and plant protection measures. The results of the experiment indicated that IBA 4000ppm was found to be best in terms of early sprouting (3.05 days), sprouting percentage (96.53), survival percentage(95.75), number of sprouts(22.75), number of shoots(17.62), shoot length(35.21cm), shoot girth(1.05cm), fresh weight of shoot(30.52 gm), dry weight of shoot(18.26gm), number of leaves(205.12), leaf length(10.75cm), leaf breadth (5.56cm), rooting percentage(95.42), number of primary roots(35.15), number of secondary roots(68.53), length of primary roots(30.24cm), length of secondary roots(23.16cm), diameter of primary root(0.56cm)fresh weight of root (2.16gm), dry weight of root(1.12gm), plant height(70.18cm) and success percentage(97.15).