Fecha/hora: 15/06/2024 21:34:32

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	21/02/2014	
Fecha de la última actualización: 	15/10/2019	
Autoria: 	GENTILE, R.M.; MARTINO, D.; ENTZ, M.H.	
Afiliación: 	R. M. GENTILE, Department of Plant Science, University of Manitoba, Canada; DANIEL LUIS MARTINO SCANDROGLIO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; M. H. ENTZ, Department of Plant Science, University of Manitoba, Canada.	
Título: 	Influence of perennial forages on subsoil organic carbon in a long-term rotation study in Uruguay. Short communication.	
Año de publicación: 	2005	
Fuente/Imprenta: 	Agriculture, Ecosystems and Environment, January 2005, Volume 105, Issue 1-2, Pages 419-423.	
ISSN: 	0167-8809	
DOI: 	10.1016/j.agee.2004.05.002	
Idioma: 	Inglés	
Notas: 	Article history: Received 30 October 2003 / Received in revised form 26 April 2004 / Accepted 10 May 2004.	
Contenido: 	ABSTRACT.
Interest is increasing in Uruguay in management practices that can store carbon in soils, such as the use of perennial forage crops. Previous studies on agricultural soils have focused on organic carbon in surface soil layers. However, due to the ability of perennial forages to develop extensive root systems, the potential exists for these crops to add carbon in the subsoil. A 38-year rotation experiment on a silty clay loam soil in southwestern Uruguay was used to examine the effect of a crop rotation including periods of pasture on total organic carbon (TOC) and particulate (>53 &#956;m) organic carbon (POC) at soil depths of 20-40 and 40-60 cm. Analysis showed the pasture rotation had higher POC concentrations at both depths than an annual crop rotation. This may indicate increased addition of organic carbon in the pasture rotation and signal a future change in TOC and mineral-associated organic carbon levels. Total organic carbon was higher in the rotation including pasture at a P level of 0.14. These results present preliminary observations on the management effects of including perennial forages in rotations on subsoil carbon levels, using a long-term experiment resource to assess very slow changes. 
© 2004 Elsevier B.V. All rights reserved.	
Palabras-Clave: 	Forage crops; Soil organic carbon; Subsoil.	
Thesagro: 	URUGUAY.	
Categoría del tema: 	--	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (12809-1) - PXI - AP - DD - PP/AGRICULTURA, ECOSYST.&ENVIRON./2005 -  -  - DIS