Impact Factor (2025): 6.9
DOI Prefix: 10.47001/IRJIET
This
research was conducted at the Faculty of Agricultural Engineering at Idlib University
(northwestern Syria), during the academic year 2023-2024, to test the effect of
treatment with the rooting hormone IBA (indole butyric acid) on the rooting
rate and speed of some ornamental plants (Aglaonemamodestum, Euonymus
japonica, and Jasminum humile), and determine the optimal
concentration of IBA hormone for rooting cuttings of the ornamental plants.
Three concentrations of the hormone were used, namely 250, 500, and 1000 ppm,
in addition to the control (treatment with distilled and sterile water only).
The results showed that the tested plants varied in their response to treatment
with the rooting hormone. All cuttings of the Aglaonema modestum
plant were able to form roots even without treatment with the IBA hormone
(control), and the rooting rate in all treatments was 100%. However, the use of
the hormone led to a significant increase in the number of roots formed (10.2
roots) and their length (3.44 cm) and the length of the treated plants (11.70
cm), and increasing the hormone concentration did not achieve any significant
increase in the studied traits. In contrast, the cuttings of the Euonymus
japonica plants did not root until after treatment with the hormone, and
the treatment with the hormone (the lowest concentration of 250 ppm) achieved a
significant increase in all studied traits, rooting percentage (90%), number of
roots (7.3 roots), length (2.3 cm), and plant length (8.05 cm), compared to the
control. Increasing the hormone concentration also achieved a significant
increase in the number of roots formed on the cutting, a non-significant
increase in the rooting percentage, and a non-significant decrease in root
length and plant length. Finally, 20% of the cuttings of the Jasminum humile
plant were rooted without treatment with the rooting hormone, but the treatment
with the hormone achieved a significant increase in the rooting percentage,
number of roots (3.4 roots), length (1.82 cm), and plant length (6.40 cm),
compared to the control. Increasing the concentration of rooting hormones also
achieved a significant increase in the rooting percentage and the number of
roots formed on the cutting, and a non-significant increase in the length of
the roots and the length of the plants. The concentration of 1000 ppm achieved
the best results (rooting percentage 60%, number of roots 7.1 roots/cutting,
root length 4.04 cm, and plant length 10.64 cm).
Country : Syria
IRJIET, Volume 8, Issue 11, November 2024 pp. 173-180