ISHS Acta Horticulturae 486: II International Symposium on Ornamental Palms & other Monocots from the Tropics
EFFECT OF SALINITY ON GERMINATION OF PHOENIX CANARIENSIS AND SABAL PALMETTO (ARECACEAE) |
| Authors: | N. Martín Alemán, A.M. de León Hernández, J.A. Rodríguez Pérez |
| Abstract:
Phoenix canariensis (Canary Islands Date Palm) and Sabal palmetto (Palmetto Palm) are two palm species used in landscaping in temperate, subtropical and tropical regions, very often in coastal areas where saline soils and waters are present. As very little is known about their salinity tolerance, a trial was carried out to study their tolerance to salinity during germination. Seeds of both species were germinated in a growth chamber in petri dishes containing saline solutions (0.0 to 27.5 dS/m for P.canariensis and 0.0 to 19.9 dS/m for S.palmetto, with a Na to Ca ratio of 2:1). The analysis of results, using a model proposed by Van Genuchten (1983) for evaluating salinity-yield response curves at the adult stage, showed that the salinity threshold, ECt, (the solution electrical conductivity at which germination starts to decrease) was 4.9 dS/m for P.canariensis and 1.6 dS/m for S.palmetto, and the percent germination decrease per unit salinity increase above ECt, (s), was 4.2% for the former and 5.0% for the latter. | |
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