Hafith Furqoni
Institut Pertanian Bogor

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Dosage Recommendation of Unbalanced Compound Fertilizers for Cabbage (Brassica oleracea) Hafith Furqoni
Botani : Publikasi Ilmu Tanaman dan Agribisnis Vol. 3 No. 2 (2026): Mei : Botani : Publikasi Ilmu Tanaman dan Agribisnis
Publisher : Asosiasi Riset Ilmu Tanaman Dan Hewani Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/botani.v3i2.570

Abstract

Fertilization serves as a fundamental component of crop cultivation, wherein the application of mineral nutrients is crucial for plant nourishment, facilitating various physiological processes critical for growth and development. The objective of this study is to establish an optimal recommended dosage that enhances cabbage growth and yield. The experimental design employed in this study was a randomized block design with four replications. The treatments consist of seven fertilization levels, as follows: No fertilization with nitrogen (N), phosphorus (P), or potassium (K) (P0), reference fertilization (P1), 0.5 dose of unbalanced compound fertilizers (P2), 0.75 dose of unbalanced compound fertilizers (P3), 1.0 dose of unbalanced compound fertilizers (P4), 1.25 dose of unbalanced compound fertilizers (P5), and 1.5 dose of unbalanced compound fertilizers (P6). The experiment indicated that the application of unbalanced compound fertilizers enhances cabbage plant growth, as evidenced by increased plant height and leaf number compared to the control treatment. Additionally, fertilization improves yield components relative to untreated plants. The application of 0.5 doses of unbalanced compound fertilizers proves agronomically effective, yielding the highest relative agronomic effectiveness at 169%, meaning a 1.69-fold increase in yield. Economically, the same dosage is also highly beneficial, achieving the highest R/C ratio of 2.35 and generating a profit of Rp. 14,365,150. The study results confirm that unbalanced compound fertilizers were both agronomically effective and economically advantageous. The recommended dosage for cabbage cultivation is 134 kg/ha, applied in two stages: 50% at 1 WAT (weeks after transplanting) and the remaining 50% at 4 WAT.
Comparison of Compound and Single-Nutrient Fertilizer Sources on Cabbage Growth and Production Hafith Furqoni
Mikroba : Jurnal Ilmu Tanaman, Sains Dan Teknologi Pertanian Vol. 3 No. 1 (2026): April : Mikroba : Jurnal Ilmu Tanaman, Sains Dan Teknologi Pertanian
Publisher : Asosiasi Riset Ilmu Tanaman Dan Hewani Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/mikroba.v3i1.569

Abstract

This study evaluated the effects of compound and single-nutrient fertilizers on the growth and yield of cabbage (Brassica oleracea L.). The experiment was conducted using a randomized complete block design with seven fertilization treatments, including varying doses of compound fertilizer and a single-nutrient control. Results showed that the application of a 1.0× dose of compound fertilizer significantly improved plant height at 3 and 4 weeks after transplanting (WAT), and increased leaf number at 5 WAT. Yield components, including yield per plant, per plot, and hectare, were significantly higher in the 1.0× treatment, with an average yield of 1.92 kg per plant—an increase of 86.4% and 11.6% compared to the control and single-nutrient treatments, respectively. The relative agronomic effectiveness of the 1.0× dose reached 139%, indicating superior performance over the standard fertilizer. Economic analysis confirmed its viability, with the highest benefit-cost ratio (R/C) of 2.23 and a net profit of IDR 14,487,900. These findings suggest that compound fertilizer is both agronomically effective and economically profitable. The recommended application rate for cabbage is 211 kg/ha, applied one week after transplanting.