Effects of Potassium and Arbuscular Mycorrhiza on Yield, Starch, and Beta-Carotene of Local Sweet Potato (Ipomoea batatas L.)

Mardhiah Hayati; Hifnalisa Hifnalisa; Murna Muzaifa; Cut Nur Ichsan; Gina Erida; Nura Nura

doi:10.18280/ijdne.200820

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Effects of Potassium and Arbuscular Mycorrhiza on Yield, Starch, and Beta-Carotene of Local Sweet Potato (Ipomoea batatas L.)

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Mardhiah Hayati, Hifnalisa Hifnalisa, Murna Muzaifa, Cut Nur Ichsan, Gina Erida, Nura Nura

2025 International Journal of Design and Nature and Ecodynamics Vol. 20 Issue 8 Article Cited by 0 SDG 2SDG 17

Abstract

Improving sweet potato productivity, starch deposition, and β-carotene levels in nutrient-poor soils requires the synergistic use of potassium fertilization and Arbuscular Mycorrhizal Fungi (AMF) inoculation. This study investigated the optimal application rates of potassium and AMF and their interactive effects on growth performance, yield, starch accumulation, and β-carotene concentration in local sweet potato (Ipomoea batatas L.) clones from Saree, Aceh Province, Indonesia. A field experiment was conducted from April to September 2023 using a Randomized Block Design in a 4 × 3 factorial arrangement, comprising four potassium fertilizer (K2O) rates (0, 60, 120, and 180 kg ha-1) and three AMF application rates (0, 10, and 20 g plant-1), with three replications. The findings of this study revealed that the highest yield, starch, and β-carotene content were achieved with a K2O dose of 120 kg ha-1(8.39 tons ha-1, 66.42%, 3.32%) and an AMF dose of 10 g plant-1(8.91 tons ha-1, 66.70%, 2.60%). Potassium fertilization enhanced sweet potato quality, with peak starch content (69.36%) at 60 kg ha-1 K2O and highest harvest index (0.77) and β-carotene (3.37%) at 120 kg ha-1 K2O2 both without AMF. While potassium markedly improved yield and nutritional traits, AMF showed no consistent quality benefits or synergy with potassium under these conditions. ©2025 The authors.

Affiliations

Agrotechnology Department, Agriculture Faculty, Universitas Syiah Kuala, Banda Aceh, 23111, Indonesia; Soil Science Department, Agriculture Faculty, Universitas Syiah Kuala, Banda Aceh, 23111, Indonesia; Agriculture Product Technology Department, Agriculture Faculty, Universitas Syiah Kuala, Banda Aceh, 23111, Indonesia

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