Ratooning Response and Yield Performance of Different Rice Varieties as Influenced by Cutting Height Under Irrigated Lowland Condition
DOI:
https://doi.org/10.69569/jip.2025.309Keywords:
Ratoon rice, NSIC Rc varieties, Cutting height, Irrigated lowland, Yield performanceAbstract
This research assessed the ratoon rice growth and yield performance with varying NSIC Rc varieties and cutting heights under lowland irrigated conditions. A 4 × 3 factorial experiment under a Randomized Complete Block Design (RCBD) was implemented in San Felipe, Tantangan, South Cotabato, from January 2024 to June 2025. The treatments consisted of four NSIC Rc varieties (Rc222, Rc160, Rc506, and Rc216) and three cutting heights (10 cm, 15 cm, and 20 cm), with analysis of data through Analysis of Variance (ANOVA) and comparison of treatment means via the Least Significant Difference (LSD) test. Ratooning is a low-cost method for enhancing rice productivity without replanting and is highly applicable among resource-poor farmers in irrigated lowlands. Findings indicated that plant height, number of tillers, panicle number, panicle length, and filled grains per panicle were significantly increased when the cut height was maintained at 15 cm, while unfilled grains were minimized. NSIC Rc216 performed better than other varieties across agronomic and economic traits, including grain yield, calculated fresh and dry grain weight, net income, and return on investment (ROI). Tillering number and panicle number had a significant interaction between Rc216 and 15 cm cutting height. These results indicate that NSIC Rc216, in combination with a 15 cm cutting height, maximizes ratoon rice productivity locally. Embracing this practice has the potential to enhance ROI by 18–25% in comparable irrigated lowland sites.
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