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Effects of α-Naphthaleneacetic acid concentration and substrates on the growth of Polyscias
fruticosa (L.) Harms cuttings
Tien T. T. Le*, Dat T. Bui, Thanh Q. Nguyen, Ngoc T. H. Le, Thuy T. H. Phan, Hue T. Nguyen, & Loan T.
H. Vuong
The Center for Business Incubation of Agricultural High Technology, Ho Chi Minh City, Vietnam
ARTICLE INFO ABSTRACT
Research Paper
Received: September 28, 2024
Revised: November 22, 2024
Accepted: November 25, 2024
Keywords
α-NAA
Cuttings
Polyscias fruticosa
Sustrate
*Corresponding author
Le Thi Thuy Tien
Email:
ltttien.hcmus@gmail.com
The study aimed to determine the optimal α-NAA
(α-Naphthaleneacetic acid) concentration and suitable substrate for
the growth of Polyscias fruticosa (L.) Harms seedlings propagated
through cuttings. The two-factor experiment was arranged in
a completely randomized design with 16 treatments and three
repetitions. The cuttings were treated with α-NAA (Factor N) at
concentrations of 1,000; 2,000; 3,000; and 4,000 mg/L and grown
in four different substrates: (G1) 100% soil, (G2) 50% soil + 50%
rice husk ash, (G3) 50% soil + 20% coco peat + 30% rice husk ash,
and (G4) 50% soil + 40% coco peat + 10% rice husk ash. The results
showed that the rooting rate and growth index of the cuttings
increased gradually with the concentration of α-NAA and reached
the highest value at 3,000 mg/L, then decreased as the concentration
of α-NAA increased. The substrate mixed with coconut peat and
rice husk ash had significantly improved porosity, helping to
increase the rooting rate and growth ability of the cuttings. It was
also shown that the best performance was achieved when cuttings
were treated with 3,000 mg/L α-NAA and grown in a substrate
consisting of 50% soil + 20% coco peat + 30% rice husk ash. In 60
days after planting, the Polyscias fruticosa cuttings’s survival rate
was 94.1% and a standard export rate of 89.9%. Growth indicators
included an average shoot height of 18.3 cm, shoot diameter of 7.2
mm, and an average of 5.3 leaves per shoot.
Cited as: Le, T. T. T., Bui, D. T., Nguyen, T. Q., Le, N. T. H., Phan, T. T. H., Nguyen, H. T., & Vuong,
L. T. H. (2025). Effects of α-Naphthaleneacetic acid concentration and substrates on the growth of
Polyscias fruticosa (L.) Harms cuttings. The Journal of Agriculture and Development 24(2), 15-24.