Fecha/hora: 08/06/2024 23:48:03

Biblioteca(s): | INIA La Estanzuela.
Tipo de la producción científica: | Artículos en Revistas Indexadas Internacionales
Circulación/Nivel: | B - 5
Fecha corriente: | 21/02/2014
Fecha de la última actualización: | 30/10/2019
Autoria: | MORON, A.; GARCIA, A.; SAWCHIK, J.; COZZOLINO, D.
Afiliación: | DAVID ALEJANDRO MORON YACOEL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ADRIANA GARCIA LAMOTHE, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JORGE SAWCHIK PINTOS, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; DANIEL COZZOLINO GÓMEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.
Título: | Preliminary study on the use of near-infrared reflectance spectroscopy to assess nitrogen content of undried wheat plants.
Año de publicación: | 2007
Fuente/Imprenta: | Journal of the Science of Food and Agriculture, 15 January 2007, Volume 87, Issue 1, Pages 147-152.
DOI: | 10.1002/jsfa.2691
Idioma: | Inglés
Notas: | Article history:Received 11 August 2005/ Revised version received 16 January 2006/ Accepted 16 August 2006.

Contenido:

Abstract: Near-infrared reflectance (NIR) spectroscopy combined with chemometrics was used to assess nitrogen (N) and dry matter content (DM) and chlorophyll in whole-wheat plant (Triticum aestivum L). Whole-wheat plant samples (n = 245) were analysed by reference method and by visible and NIR spectroscopy, in fresh (n = 182) and dry (n = 63) presentations, respectively. Calibration equations were developed using partial least squares (PLS) and validated using full cross-validation (leave-one-out method). Coefficient of determination in calibration (R2CAL) and the standard error of cross-validation (SECV) for N content in fresh sample presentation, after second derivative, were 0.89 (SECV: 0.64%), 0.86 (SECV: 0.66%) and 0.82 (SECV: 0.74%) using the visible + NIR, NIR and
visible wavelength regions, respectively. Dry sample presentation gave better R2 CAL and SECV for N compared with fresh presentation (R2 CAL > 0.90, SECV <0.20%) using visible + NIR. The results demonstrated that NIR is a suitable method to assess N concentration in wheat plant using fresh samples (unground and undried).

Palabras-Clave: | DRY MATTER; FORRAJE NO SECO; MATERIA SECA; NEAR-INFRARED SPECTROSCOPY; NITROGEN; PARTIAL LEAST SQUARES; UNDRIED FORAGE; WHEAT.
Thesagro: | NIRS; TRIGO.
Categoría del tema: | F01 Cultivo
Registro original: | INIA La Estanzuela (LE)
Ejemplares: | LE - (49576-1) - INI - AP - PP - PP/J. Sci Food Agri/2007 -  -  - DIS