Growth Response of Oil Palm (Elaeis guineensis Jacq.) DXP Socfindo LaMe Variety to Salinity Stress during the Pre-Nursery Stage
Abstract
This study was designed to analyze the effects of salinity stress on the vegetative growth and adaptation of oil palm (Elaeis guineensis) seedlings of the DxP Socfindo LaMe variety during the pre-nursery phase. The experiment was conducted at the Laboratory and Greenhouse of the Indonesian Palm Oil Technology Institute from July to August 2025. Using a Randomized Block Design (RBD), three levels of salt concentration were tested: S0 (0 mmhos) as the control, S1 (NaCl 5–6 mmhos), and S2 (NaCl 6–7 mmhos), each with three replications. The parameters measured included plant height, stem diameter, number of leaves, chlorophyll content, biomass weight, and root structure. Data were analyzed using ANOVA and Duncan’s Multiple Range Test (DMRT) at the 5% significance level. The results indicated that salt exposure elicited varying growth responses in the seedlings. Significant effects were observed at 8 weeks after planting (WAP) for plant height, at 9 and 11 WAP for leaf number, and at 11 WAP for chlorophyll concentration. Biomass and root system parameters exhibited significant to highly significant sensitivity. Interestingly, the S2 treatment (highest salt concentration) yielded the most optimal results for the majority of variables. These findings confirm that Socfindo LaMe DxP seedlings possess considerable tolerance to certain saline conditions, providing valuable insights for the plantation industry in utilizing marginal lands.
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