Análisis de los efectos de distintas densidades de siembra en la calidad molinera de la línea promisora L-17 de arroz (Oryza sp.) en la localidad de Babahoyo

Rice is an essential crop for ensuring food security and, at the same time, securing adequate profitability for farmers. This study aims to determine the effect of different planting densities on the milling quality of the promising rice line L-17 (Oryza sp.), using a completely randomized design (CRD) with two factors: two rice cultivars and six planting densities. The results indicated that both the L-17 line and the commercial variety SFL-11 showed statistically significant differences in several variables related to milling quality: polishing, whole grain percentage, broken grains, whiteness, and chalkiness. However, no statistically significant differences were observed among planting densities or in the cultivar*density interaction. Regarding amylose content, L-17 was significantly superior to SFL-11 at several densities (D1, D2, D3, and D5). For protein content, L-17 presented slightly higher values at D1, D3, and D5, though these differences were not statistically significant. In the variables husk, brown rice, and bran, no significant differences were found, although density D3 of L-17 showed balanced results across the studied variables. The highest percentages of whole grains were observed in L-17 at D2 (610.33) and in SFL-11 at D6 (636.67), without statistical significance. In conclusion, the L-17 line proved to be competitive compared to SFL-11 in terms of milling quality. Densities D1, D3, and D5 contributed to favorable performance in the L-17 line, supporting its viability as an alternative cultivar. This positive performance positions L-17 as a promising option for the rice sector, particularly under certain planting densities.

Rice is an essential crop for ensuring food security and, at the same time, securing adequate profitability for farmers. This study aims to determine the effect of different planting densities on the milling quality of the promising rice line L-17 (Oryza sp.), using a completely randomized design (CRD) with two factors: two rice cultivars and six planting densities. The results indicated that both the L-17 line and the commercial variety SFL-11 showed statistically significant differences in several variables related to milling quality: polishing, whole grain percentage, broken grains, whiteness, and chalkiness. However, no statistically significant differences were observed among planting densities or in the cultivar*density interaction. Regarding amylose content, L-17 was significantly superior to SFL-11 at several densities (D1, D2, D3, and D5). For protein content, L-17 presented slightly higher values at D1, D3, and D5, though these differences were not statistically significant. In the variables husk, brown rice, and bran, no significant differences were found, although density D3 of L-17 showed balanced results across the studied variables. The highest percentages of whole grains were observed in L-17 at D2 (610.33) and in SFL-11 at D6 (636.67), without statistical significance. In conclusion, the L-17 line proved to be competitive compared to SFL-11 in terms of milling quality. Densities D1, D3, and D5 contributed to favorable performance in the L-17 line, supporting its viability as an alternative cultivar. This positive performance positions L-17 as a promising option for the rice sector, particularly under certain planting densities.

El arroz es un cultivo esencial para garantizar la seguridad alimentaria y, así mismo, asegurar una rentabilidad correcta para los agricultores. Este estudio tiene como objetivo determinar el efecto a la calidad molinera de distintas densidades de siembra en la línea promisora L-17 de arroz (Oryza sp.), por medio de un diseño experimental completamente al azar (DCA), en dos factores que son: dos cultivares arroz y seis densidades de siembra. Los resultados indicaron que la línea L-17 y la variedad comercial SFL-11 presentaron significancia estadística en varias variables en cuanto a calidad molinera: pulido, grano entero, arrocillo, blancura y centro blanco. Pero, no se observaron significancia estadística entre las densidades ni en la interacción cultivar*densidad. Por otro lado, el contenido de amilosa, L-17 fue significativamente superior a SFL-11 en varias densidades D1, D2, D3 y D5. En el contenido de proteína, L-17 presento valores levemente mayores en D1, D3 y D5, pero sin significancia estadísticas. En las variables cáscara, arroz integral y polvillo, no se encontró significancia estadística, aunque la densidad D3 de L-17 presento resultados equilibrados en las variables estudiadas. Los mejores porcentajes de granos enteros se presentaron en la línea L-17 en la D2 (610,33) y SFL-11 con D6 (636,67), sin significancias estadísticas. En conclusión, la línea L-17 resulto ser competitiva frente a SFL-11 en cuanto a calidad molinera. Las densidades D1, D3 y D5 contribuyeron a un buen rendimiento de la línea L-17, proponiendo su viabilidad como cultivar alternativo. Este desempeño positivo posiciona la línea L-17 como una opción promisoria para el sector arrocero, principalmente bajo determinadas densidades de siembra.