Article in Press
Article in Press
VOL 7 ISSUE 1 (March 2026)
In Progress (March 2026) | This issue is in progress but contains articles that are final and fully citable. DOIs will be activated once the issue is fully published.
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Effect of NPK Fertilizer and Liquid Organic Fertilizer on Growth and Production of Sunflower (Helianthus annuus L.)
Effect of NPK Fertilizer and Liquid Organic Fertilizer on Growth and Production of Sunflower (Helianthus annuus L.)
Ikbal Maulana, Budiman, Adinda Nurul Huda Manurung
Ikbal Maulana, Budiman, Adinda Nurul Huda Manurung
Abstract
Sunflowers are economically valuable plants that have been introduced and cultivated in Indonesia. The use of appropriate fertilizers plays a crucial role in enhancing plant growth and yield. This study aimed to study the impact of NPK and POC fertilizers on the growth and yield of sunflowers. The experiment was conducted from February to May 2025 in the UG Carte UG Technopark. A factorial randomized complete block design (RCBD) with two factors: NPK fertilizer doses (0, 2.5, 5, 7.5, and 10 g/plant) and liquid organic fertilizer (LOF) doses (0, 5, and 10 ml/L). Each treatment was replicated three times. Each treatment unit consisted of four plants, resulting in a total of 180 experimental units. Data were analyzed using analysis of variance (ANOVA) with the SAS System for Windows 9.0. When significant differences were detected at P < 0.05, Duncan's Multiple Range Test (DMRT) was performed at a 5% significance level. The results showed that NPK fertilizer significantly increased plant height at 4–8 weeks after planting (WAP), number of leaves at 4 and 6 WAP, stem diameter at 4–10 WAP, leaf area, flower diameter, tubular floret diameter, number of ribbon florets, number of seeds per flower, and seed weight per flower. In contrast, LOF treatment did not significantly affect sunflower growth or yield, and no interaction was observed between NPK and LOF treatments on these parameters.
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