PROPAGATION OF JHAU (Casuarina equisetifolia) AND WAX JAMBU (Syzygium samarangense) THROUGH AIR LAYERING USING DIFFERENT ROOT PROMOTING SUBSTANCES

Abstract

The experiment was conducted at the Horticulture Farm of Sher-e-Bangla Agricultural University (SAU), Sher-e-Bangla Nagar, Dhaka-1207, Bangladesh to evaluate the influence of propagation of jhau (Casuarina equisetifolia) and wax jambu (Syzygium samarangense) through air layering using different root promoting substances during the period from March, 2022 to June, 2022. The experiment was laid out in Completely Randomized Design (CRD) with three replications. Eight treatments, T 0 : Control (75% Soil + 25% Cow dung); T 1 : 75% of (75% Soil + 25% Cow dung) + 25% Vermicompost; T 2 : 75% Soil + 25% Cow dung + Garlic extract (50 g/L); T 3 : 75% Soil + 25% Cow dung + Aloe vera gel (20 ml/L); T 4 : 75% Soil + 25% Cow dung + IBA @ 50 ppm; T 5 : 75% Soil + 25% Cow dung + Honey (2 table spoon/L); T 6 : 75% Soil + 25% Cow dung + NAA @ 40 ppm and T 7 : 75% Soil + 25% Cowdung + IAA @ 30 ppm were included in the study. Results showed that the significant variations were observed among different parameters. In the case of different treatments performance of jhau, T 1

showed best performance in terms of total number of roots per layer (70.20), rooting percentage (95.55%) and survival percentage after placing in the polybag (90.40%) and the order of rank of study was T 1 > T 4 > T 6 > T 3 > T 2 > T 7 > T 5 > T 0 . On the contrary for wax jambu, T 6 showed best performance in terms of total number of roots per layer (63.60), rooting percentage (97.76%) and survival percentage after placing in the polybag (74.67%) and the order of rank of study was T 6 > T 1 > T 4 > T 5 > T 0