Abstract
This study was conducted to determine the effectiveness of NPK (15-15-6) fertilizer on the growth and yield of lowland rice. It was carried out on irrigated rice fields in the second season (March-June), on Alfisol soil (25 m asl). RCBD experimental design with 8 doses of fertilizer treatment and 3 replications. Treatment: a) without fertilizer, b) local recommendation of NPK (15-15-15) 300 + Urea 200 kg/ha, c) NPK (15-15-6) 200 + Urea 0 kg/ha, d) NPK (15-15-6) 300 + Urea 0 kg/ha, e) NPK (15-15-6) 400 + Urea 0 kg/ha, f) NPK (15-15-6) 200 + Urea 200 kg/ha, g) NPK (15-15-6) 300 + Urea 200 kg/ha, and h) NPK (15-15-6) 400 + Urea 100 kg/ha. The results showed that the application of NPK (15-15-6) 300 + 200 urea kg/ha had a significant effect on plant height, productive tillers and yield. The yield was 7,448 t/ha and the RAE (Relative Agronomic Effectiveness) value was 106.46, while the recommended fertilizer yield was 7.20 t/ha and the RAE value was 100. NPK fertilizer (15-15-6) dose of 300 + 200 Urea kg/ha can recomedate as an alternative NPK fertilizer in lowland rice.
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