RESPONSE OF RICE GROWTH AND YIELD UNDER DIFFERENT TIMING OF NPK-BASE FERTILIZERS APPLICATION IN THE SALIBU SYSTEM

Paiman, Prodi Agroteknologi, Fakultas Pertanian, UPY (2025) RESPONSE OF RICE GROWTH AND YIELD UNDER DIFFERENT TIMING OF NPK-BASE FERTILIZERS APPLICATION IN THE SALIBU SYSTEM. ECOLOGY AND ENVIRONMENTAL RESEARCH 23(4):6643-6656. http://www.aloki.hu ● ISSN 1589 1623 (Print) ● ISSN 1785 0037 (Online).

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Abstract

In the Salibu system (SS), rice plants have a shorter growth cycle than their parent plants. Applying NPK-base fertilizer can promote optimal vegetative growth and yield. This study aimed to determine the optimal timing of NPK-base fertilizer application to enhance rice yield in the SS. The experiment was arranged in a randomized complete block design (RCBD) with three replications, where each replication acted as a block. The timing of NPK-base fertilizers application included four treatments: no application (control), at harvest, stem cuttings (seven days after harvest, or 7 DAH), and seven days after stem cuttings (7 DAC). The results indicated that the application of NPK-base fertilizers could significantly increase the shoot dry weight clump-1 and 1000-filled grains. The Application of NPK-base fertilizer at stem cuttings enhanced plant height at 28 DAC, with no significant difference compared to harvest. Furthermore, this treatment resulted in a higher grains dry weight clump⁻¹ (15.3 g) than the control (13.2 g), and was not significantly different from the treatments at harvest (13.9 g) or 7 DAC (14.6 g). No significant differences were observed among the treatments at harvest, 7 DAC, and the control. The conclusion shows that applying NPK-base fertilizer at stem cuttings of the parent plants optimally enhances the rice yield in the SS. Future research should recommend determining the optimal dosage of NPK-base fertilizer to maximize rice growth and yield. Keywords: harvest, main stem, parent plant, ratoon, stem cutting

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