Effectiveness of Ameliorant and Potassium Fertilizer Applications on the Vegetative Growth of Sugarcane (Saccharum officinarum L.) Var. Bululawang

Boby Akbar  Faris; Sudiarso Sudiarso; Nur Edy  Suminarti; Subiyakto Subiyakto

doi:10.18343/jipi.31.2.355

Authors

Boby Akbar Faris Agronomy Study Program, Faculty of Agriculture, Brawijaya University, Malang 65145, Indonesia
Sudiarso Sudiarso Agronomy Study Program, Faculty of Agriculture, Brawijaya University, Malang 65145, Indonesia
Nur Edy Suminarti Agronomy Study Program, Faculty of Agriculture, Brawijaya University, Malang 65145, Indonesia
Subiyakto Subiyakto Center for Horticulture and Plantation Research, National Research and Innovation Agency, West Java 16911, Indonesia

DOI:

https://doi.org/10.18343/jipi.31.2.355

Keywords:

ameliorant, Bululawang Variety, potassium fertilizer, sugarcane, vegetative growth

Abstract

Sugarcane (Saccharum officinarum L.) is a strategic crop in Indonesia's sugar industry, but its productivity fell from 87.40 t/ha in 2022 to 86.40 t/ha in 2023, remaining below the potential yield of the Bululawang variety (94.3 t/ha). This decline was attributed to unsustainable agriculture practices and climate change, which resulted in decreased soil fertility. The purpose of this study was to examine the effects of ameliorant and potassium fertilizer combinations on the vegetative growth of sugarcane (Bululawang variety) and identify which treatment was more beneficial. The treatments included seven combinations: P1 (no ameliorant and no K₂O), P2 (4 L/ha ameliorant + 388.8 kg K₂O), P3 (4 L/ha ameliorant + 259.2 kg K₂O), and P4 (4 L/ha ameliorant + 129.6 kg K₂O), P5 (8 L/ha + 388.8 kg K₂O/ha), P6 (8 L/ha + 259.2 kg K₂O/ha), and P7 (8 L/ha + 129.6 kg K₂O/ha) were duplicated four times. The findings revealed that the combination of ameliorant and potassium fertilizer greatly promoted vegetative development, as evidenced by increased root length, root dry weight, number of leaves, plant height, leaf area, number of tillers, stem diameter, and total plant biomass. Treatment P5 provided the highest values for several parameters, however treatment P6 had no significant difference from P5 for certain features, indicating more efficient potassium usage.
Keywords: ameliorant, Bululawang Variety, potassium fertilizer, sugarcane, vegetative growth

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