Application of Arbuskular Mycorrhiza and Various Doses of NPKMg Fertilizer (15:15:6:4) in Pre-Nursery Oil Palm (Elaeis guineensis Jacq.)

Abstract

Oil palm (Elaeis guineensis Jacq.) is a leading vegetable oil-producing crop in Indonesia, particularly in the Kalimantan region, which has extensive oil palm plantations. However, during the pre-nursery stage, the growth of oil palm seedlings is highly influenced by the availability of optimal nutrients. This study aims to determine the interaction effect between Arbuscular Mycorrhizal Fungi (AMF) and NPKMg (15:15:6:4) fertilizer on oil palm seedlings at the pre-nursery stage and to identify the best dosage for improving fertilization efficiency. The research was conducted in Penyalimau Village and Pontianak State Polytechnic, using a factorial randomized block design (RBD) with two factors: AMF dosage (M₀ = control, M₁ = 5 g/polybag, M₂ = 10 g/polybag, M₃ = 15 g/polybag) and NPKMg dosage (N₀ = control, N₁ = 0.5 g/polybag, N₂ = 1 g/polybag, N₃ = 1.5 g/polybag). The results showed that the combination of AMF and NPKMg did not have a significant effect on the observed growth parameters. However, applying AMF at a dose of 15 g/polybag had a positive impact on plant height growth. These findings provide preliminary information useful for optimizing oil palm pre-nursery fertilization strategies, which have the potential to enhance fertilizer efficiency and promote sustainable seedling growth.