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All Journal Jurnal Agronomi Tanaman Tropika (JUATIKA)
Lisa Mawarni
Univesitas Sumatra Utara, Medan
Agriculture, Biological Sciences & Forestry

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The Role of Mycorrhizal and Humic Acid Biofertilizers in Supporting the Growth of Oil Palm Seedlings (Elaeis guineensis Jacq.) in the Main Nursery Stage on Ultisol Soil Andri Ikhsan; Mariani Sembiring; Lisa Mawarni
JURNAL AGRONOMI TANAMAN TROPIKA (JUATIKA) Vol. 8 No. 2 (2026): Jurnal Agronomi Tanaman Tropika (JUATIKA) Vol. 8 No. 2 Mei 2026
Publisher : LPPM UNIVERSITAS ISLAM KUANTAN SINGINGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36378/juatika.v8i2.5418

Abstract

To overcome the limitations of ultisol soils and the increasing demand for high-quality oil palm seedlings, this study evaluates a combination of humic acid and mycorrhizal biofertilizer applications with reduced NPK fertilization at the main nursery stage to increase nutrient availability and support more efficient and sustainable nursery management on marginal soils. The experiment was conducted in the Agricultural Field of the Faculty of Agriculture, University of North Sumatra using a Non-Factorial Randomized Design, consisting of mycorrhiza + humic acid), F (3/4 standard NPK + mycorrhiza + humic acid), and G (standard NPK + mycorrhiza + humic acid). The results showed that the combined application of mycorrhizal biofertilizer and humic acid significantly improved the growth of oil palm seedlings at the main nursery stage. The best growth performance was observed in treatment E (1/2 standard NPK + mycorrhiza + humic acid), as indicated by increased plant height, number of leaves, stem diameter, and both fresh and dry weights. In addition, treatments E (1/2 standard NPK + mycorrhiza + humic acid) and F (3/4 standard NPK + mycorrhiza + humic acid) improved phosphorus uptake and its efficiency, with values comparable to the standard NPK treatment (B), while also increasing root colonization, with the highest levels observed in these treatments.
Co-Authors Andri Ikhsan Mariani sembiring