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Abstract

Four clonal oil palm materials namely AVROS, Yangambi, La Me and NIFOR and two DxP hybrid Yangambi, grown on terraced and unterraced fields were subjected to irrigated and non-irrigated conditions. There were significant differences in all leaf nutrient concentrations for all the planting materials for both terrain and irrigation conditions. For nonirrigated palms, most of the leaf nutrients were higher than the irrigated palms, especially K and Mg concentrations. Most of the leaf nutrient concentrations in palms grown on undulating area were also high, especially for leaf Mg and K concentrations. Leaf K concentration for DxP hybrid Yangambi-DQ8 was consistently lower than AVROS-A122 by almost 15-20% in all the growing conditions. In contrast, the leaf K contents for Yangambi-DQ8 and Yangambi-Y103 were comparable to that of AVROS-A122 and these three planting materials produced the highest oil yields. In view of future high current fertilizer cost, selecting oil palm genotypes that are able to produce good oil yields on low fertilizer inputs and giving consistent leaf nutrition need to be given consideration.

Usage of Biofertilizers to Correct the Nutrient Deficiency of Oil Palm (Elaeis guineensis): An Observational Study and Review

“…Also described in the literature are the marginal values of nutrients. Woittiez et al [12] and Lee et al [15] found that Mg content is negligible, with the mean concentrations of 0.20 and 0.21 respectively. According to Jacquemard et al [16], N concentration is negligible (mean: 2.98).…”

“…Yadegari et al [3] determined the optimal P, K and Mg levels to be 0.17, 1.05 and 0.30 respectively. According to Lee et al [15], N, P and K concentrations are optimal, with respective values of 2.71, 0.17 and 1.03. Ibrahim et al [17] determined that N, P and Mg concentrations were optimal with values of 2.79, 0.15 and 0.32 respectively.…”

Fertilizer placement in circle weeding vs. in interrow: which one is better for oil palm?

“…In this study, the leaf nutrient content especially Mg tends to be higher in circle zone fertilization due to the absence of competing weeds in the circle weeding. This is because weeds absorb nutrients through the competition when fertilization is carried out on oil palm plantations [25].…”