PROPAGATION OF Magnolia fordiana (Oliv.) Hu FROM SEEDS IN LAM DONG PROVINCE
DOI:
https://doi.org/10.70169/VJFS.1304Keywords:
GA3, germination rate, Magnolia fordiana, propagation, storage durationAbstract
Magnolia fordiana (Oliv.) Hu is a native timber species with high potential for urban landscaping, afforestation, and medicinal use. This study aimed to determine the fruit and seed characteristics, germination capacity, seed storage techniques, and seedling growth of the species during the nursery stage. The fruits measured 79.33 ± 0.25 mm in length and 55.00 ± 0.10 mm in diameter, while the seeds were 7.30 ± 0.06 mm long and 5.77 ± 0.15 mm in diameter, with a 1000-seed weight of 32.71 ± 2.92 g and a moisture content of 13.21 ± 2.26%. Seeds reached water saturation after approximately 20 hours of imbibition. Soaking in GA3 at 1500 ppm produced the best results: a germination rate of 90.00 ± 5.77%, germination energy of 84.44 ± 10.18%, and a mean germination time of 7.33 ± 0.58 days. Cold storage (5 - 10°C) maintained seed viability better than room temperature; germination capacity was almost completely lost after 6 months of cold storage and after only 2 months at room temperature. After 3 months in the nursery, seedlings grown in a 50% soil + 50% coconut coir mixture showed a survival rate of 98.89 ± 1.92%, a height of 8.49 ± 0.08 cm, a root collar diameter of 3.26 ± 0.03 mm, and 4.49 ± 0.03 leaves.
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