e-ISSN 2231-8542
ISSN 1511-3701

Home / Regular Issue / JTAS Vol. 9 (2) Aug. 1986 / PERT-0366-1986


COMMUNICATION I: Optimum Substrate for the Establishment of the Epiphyte Dischidia nummularia (Asclepiadaceae)


Pertanika Journal of Tropical Agricultural Science, Volume 9, Issue 2, August 1986

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Brick fragments or wood crumbs (which are substrates with good water retention and aeration) with the addition of nutrients are optimum substrates for the establishment of seedlings of the epiphytic Dischidia nummularia. Seeds of D. nummularia, when moistened show 100% germination. Germination is rapid — the radicle is fully grown within a day and the cotyledons emerge within four to five days. Subsequent seedling growth, especially for root system development, was better on brick fragments or wood crumbs than on sand indicating that good water retention and aeration are necessary for seedling establishment. Within an eight-week period, seedling growth on substrates low in nutrients was slow compared with substrates where commercial fertiliser was applied in the recommended amount for epiphytic orchids. The height and number of leaves was roughly doubled and the total dry weight increased between three and four-fold. Further, with brick fragments as a substrate, addition of nutrients resulted in a more extensive root system.

ISSN 1511-3701

e-ISSN 2231-8542

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