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Evaluation of Bark as a Growth Medium for Cultivation of Phalaenopsis orchids
The growth performance of seedlings of Phal. Sogo Yukidian in 10.5-cm-pot (leaf span 14.3-20.1 cm) under various growth media with different fertigation frequency and nutrient solution (Peters 20 N-20 P2O5-20 K2O) concentrations for 6 months. A. Sphagnum moss (1 time per 2 weeks with 667 mg L-1), B. Large size bark 91 time per week with 667 mg L-1), C. Large size bark (2 times per week with 333 mg L-1) and D. Large size bark (3 times per week with 222 mg L-1)
The growth performance of seedlings of Phal. Sogo Yukidian in 10.5-cm-pot (leaf span 14.3-20.1 cm) under various growth media with different fertigation frequency and nutrient solution (Peters 20 N-20 P2O5-20 K2O) concentrations for 6 months. A. Sphagnum moss (1 time per 2 weeks with 667 mg L-1), B. Large size bark 91 time per week with 667 mg L-1), C. Large size bark (2 times per week with 333 mg L-1) and D. Large size bark (3 times per week with 222 mg L-1)

Author:Keng-Heng Chang*, Long-Ho Tsai, Rung-Yi Wu, Ting-En Dai and Ting-Fang Hsieh

Abstract:

    In order to evaluate the possibility of using the commercial bark imported from New Zealand for cultivation of Phalaenopsis seedlings, the physical and chemical properties of bark were investigated. Orchid (Phal. Sogo Yukidian) seedling growth under different combinations of culture media, fertilization frequency and nutrient solution concentrations also were tested in the screen house. The results showed that the pH value of the bark ranging from 5.0 to 6.12 was not significantly different from that of sphagnum moss. However the electric conductivity (EC) and water holding capacity of the bark was lower than those of sphagnum moss. The growth performance of Phalaenopsis seedlings in bark and various mixed media was inferior to those in sphagnum moss when commercial fertilization frequency and concentration of nutrient solution (1 time per 2 weeks with 667 mg L-1) were applied. When bark and various mixed media for growth of Phalaenopsis were tested with various fertilization frequency and concentrations of nutrient solution (1 time per week with 667 mg L-1, two times per week with 333 mg L-1 and 3 times per week with 222 mg L-1), it was found that the growth performance of plants with 1 time per week with 667 mg L-1 fertilization was superior to others. Under this fertilization condition, the growth performance of plants grown in bark with various media was not significantly different from that of sphagnum moss with commercial fertilization frequency and concentration of nutrient solution (1 time per 2 weeks with 667 mg L-1).

Key words:Bark, Sphagnum moss, Phalaenopsis, Fertigationfrequency, Nutrient solution concentration

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Journal of
Taiwan Agricultural Research
Vol. 73, No.1 (2024) ISSN: 2790-086X Vol. 73, No.1 (2024)
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