Vol. 12, Issue 4 (2023)

Author(s):
Dr. M Kiruba, Dr. PS Devanand, Dr. B Sivakumar, K Nelson Navamani Raj, Dr. R Vijayan, Dr. K Hemaprabha, Dr. P Radha, Dr. M Tilak, Dr. S Utharasu, Dr. K Sivakumar and M Mathivanan

Abstract:
Vegetative propagation plays a key role in tree improvement programmes as a tool for large scale multiplication of superior genotypes. Dalbergia sissoo is a globally important tree species and it is used for timber purposes. Multiplication of clones through vegetative propagation is very difficult in Dalbergia sissoo. To overcome, different concentrations of IBA solutions viz., 1000 ppm (T1), 2000 ppm (T2), 3000 ppm (T3) 4000 ppm (T4), 5000 ppm (T5) were prepared and the stem cuttings prepared from the mother tree were dipped in them. Untreated cuttings served as control (T6). The results of the present showed, cuttings of the size of 15 cm X 2.5 cm Dalbergia sissoo dipped with IBA 4000 ppm planted in Sand: Soil: VAM (2:1:1) is suitable for enhancing rooting and survival percent of stem cuttings. Such knowledge will aid propagators, geneticists and tree improvement specialists in selecting treatments that reduce propagation costs by maximizing rooting success. Hopefully the present studies will also pave the way to develop clones of superior trees of Dalbergia sissoo used for nitrogen fixation, fodder in agroforestry or large scale timber purposes.