Fecha/hora: 06/06/2024 04:07:20

Biblioteca(s): 	INIA La Estanzuela.	
Fecha corriente: 	21/02/2014	
Fecha de la última actualización: 	30/09/2019	
Autoria: 	MORON, A.; COZZOLINO, D.	
Afiliación: 	DAVID ALEJANDRO MORON YACOEL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; DANIEL COZZOLINO GÓMEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.	
Título: 	Determination of potentially mineralizable nitrogen and nitrogen in particulate organic matter fractions in soil by visible and near-infrared reflectance spectroscopy.	
Año de publicación: 	2004	
Fuente/Imprenta: 	Journal of Agricultural Science, June 2004, Volume 142, Issue 3, Pages 335-343.	
DOI: 	10.1017/S0021859604004290	
Idioma: 	Inglés	
Notas: 	Article history:Revised MS received 2 July 2004	
Contenido: 	SUMMARY:
Visible (VIS) and near-infrared reflectance spectroscopy (NIRS) combined with multivariate data analysis was used to predict potentially mineralizable nitrogen (PMN) and nitrogen in particulate organic matter fractions (PSOM-N). Soil samples from a long-term experiment (n=24) as well as
soils under commercial management (n=160) in Uruguay (South America) were analysed. Samples were scanned in a NIRS 6500 monochromator instrument by reflectance (400?2500 nm). Modified partial least square regression (MPLS) and cross validation were used to develop the calibration
models between NIRS data and reference values. NIRS calibration models gave a coefficient of determination for the calibration (R2 CAL)>0.80 and the standard deviation of reference data to standard error in cross validation (RPD) ratio ranging from 2 to 5. 5 for the variables evaluated. The
results obtained in the study showed that NIRS could have the potential to determine PMN and PSOM-N fractions in soils under different agronomic conditions. However, the relatively limited number of samples led us to be cautious in terms of conclusions and to extend the results of this work
to similar conditions.	
Palabras-Clave: 	AGRICULTURAL SOILS; MINERALIZATION; MULTIVARIATE ANALYSIS; NITROGEN CONTNET; ORGANIC SOILS; SOIL ORGANIC MATTER(SOM).	
Thesagro: 	NIRS.	
Categoría del tema: 	--	
Registro original: 	INIA La Estanzuela (LE)	
Ejemplares: 	LE - (35241-1) - PXI - AP - DD - PP/Journal of Agricultural Science/2002 -  -  - DIS