Abstract:
The experiment was conducted at the Germplasm center of Horticulture farm of Sher-eBangla
Agricultural University (SAU), Sher-e-Bangla Nagar, Dhaka-1207, Bangladesh
to evaluate the influence of plant growth regulators on rooting and survival of stem
cuttings of china rose and bougainvillea during the period from June 2021 to March
2022. The duration of the experiment was 5
ii
th
June to,2021 to 5
th
September,2021 in
rainy season and 15
th
December, 2021 to 15
th
March, 2022 in winter season. The
experiment was laid out in Randomized Complete Block Design (RCBD) with three
replications. Three treatments, viz. G
0
= Control (treated with water), G
1
= Equally
mixed Indole Butyric Acid (IBA) @125ppm and Naphthalene Acetic Acid (NAA) @
125 ppm, G
2
= Equally mixed Indole Butyric Acid (IBA) @250 ppm and Naphthalene
Acetic Acid (NAA) @250 ppm were included in this study. In the case of different
treatments performance, G
2
showed best performance in terms of days to shoot
initiation, number of roots per cutting, length of roots (cm), rooting percentage, shooting
percentage, number of shoots per cutting, number of branches, shoot Length (cm),
number of leaves, sprouting percentage and survival percentage of China rose and
Bougainvillea cuttings. G
2
showed best performance in bougainvillea in terms of rooting
percentage in winter season 71.26% and in rainy season 86.74% and survival percentage
in winter season 76.67% and in rainy season 85.20%. G
2
showed best performance in
china rose in terms of rooting percentage in winter season 74.77% and in rainy season
89.50% and survival percentage in winter season 73.33% and in rainy season 92.36%. In
comparison to rainy and winter season, plant growth regulators on rooting and survival
of china rose and bougainvillea has found superior result in rainy season. Cuttings also
established in winter with the help of plant growth regulators. From the study, it may be
concluded that treatment G
2
has more efficacy among different treatments for the
influence of plant growth regulators on rooting and survival of stem cuttings of china
rose and bougainvillea which was followed by G
1
