SciELO - Scientific Electronic Library Online

 
vol.40 número2Un potencial modificador nutricional para predecir productividad primaria de Pinus radiata en Nueva Zelanda usando un modelo simplificado de eficiencia en el uso de la radiaciónDiferenciación cuantitativa entre el carbono orgánico del suelo y el carbono del biochar en suelos áridos índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

Compartir


Ciencia e investigación agraria

versión On-line ISSN 0718-1620

Resumen

QUEZADA, Celerino et al. Selection of rice genotypes (Oryza sativa) with high nitrogen agronomic efficiency in an Acuic Durixererts soil, central-southern Chile. Cienc. Inv. Agr. [online]. 2013, vol.40, n.2, pp.375-385. ISSN 0718-1620.  http://dx.doi.org/10.4067/S0718-16202013000200012.

C. Quezada, S. Hernaíz, I. Vidal, R. Alvarado, R. Gallegos, and W. Yañez. 2013. Selection of rice genotypes (Oryza sativa) with high nitrogen agronomic efficiency in an Acuic Durixererts soil, central-southern Chile. 40(2): 375-385. Nitrogen agronomic efficiency (NAE) is a key factor that has not been considered in rice breeding programs. The objective of this study was to evaluate nitrogen agronomic efficiency in twenty rice genotypes in an Acuic Durixererts soil (Quella Series) located in Chile's south central zone (36°04'S, 72° 0'W) over the 2008-09 growing season. The field experiment was carried out in a complete randomized split-plot block design with five N treatments of 0, 50, 100, 150 and 200 kg ha-1 and twenty genotype sub-treatments. The following agronomic characteristics of the crops were measured: yield, grain fill percentage, and nitrogen agronomic efficiency. The N level had a significant effect on grain yield, NAE and the number of panicles per m2. Highly significant differences in all parameters evaluated were observed between genotypes. The nitrogen x genotype interaction had significant effects on plant height, 1000-grain weight and the grain fill percentage. The best performing rice genotypes were as follows: Quila 233006, Quila 223202, CINIA 857, and RQuila 17 with a 50 kg N ha-1 dose and Ámbar, RQuila 17 and Quila 242105 with 100 kg N ha-1 dose. These genotypes had high NAE and yield components that may be of use when producing new cultivars. Our results demonstrate the importance of selecting rice genotypes with greater NAE and considering this parameter when making N fertilizer recommendations.

Palabras clave : Nitrogen agronomic efficiency; nitrogen dose; rice genotypes.

        · resumen en Español     · texto en Inglés     · Inglés ( pdf )

 

Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons