Fecha/hora: 03/06/2024 10:17:50

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	19/01/2022	
Fecha de la última actualización: 	20/01/2022	
Autoria: 	RUBIO, V.; QUINCKE, A.; ERNST, O.	
Afiliación: 	VALENTINA RUBIO DELLEPIANE, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JUAN ANDRES QUINCKE WALDEN, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; OSWALDO ERNST, Dep. de Producción Vegetal, Facultad de Agronomía, Estación Experimental Mario Alberto Cassinoni, Universidad de la República, Ruta 3, km 363, Paysandú, 60000, Uruguay.	
Título: 	Deep tillage and nitrogen do not remediate cumulative soil deterioration effects of continuous cropping.	
Complemento del título: 	Soil Tillage, Conservation, and Management.	
Año de publicación: 	2021	
Fuente/Imprenta: 	Agronomy Journal, 2021, Volume 113, Issue 6, Pages 5584-5596. doi: https://doi.org/10.1002/agj2.20927	
ISSN: 	0002-1962	
DOI: 	10.1002/agj2.20927	
Idioma: 	Inglés	
Notas: 	Article history: Received 19 July 2021; Accepted 12 October 2021; Published online 25 November 2021.
Corresponding author: Rubio, V.; Instituto Nacional de Investigación Agropecuaria (INIA), Programa de Producción y Sustentabilidad Ambiental, Estación Experimental INIA La Estanzuela, Ruta 50 km 11, Colonia, Uruguay; email:vrubio@inia.org.uy  -- 
Supporting information: Additional supporting information may be found in the online version of the article at the publisher?s website.	
Contenido: 	ABSTRACT. - Short-term solutions like increasing N fertilization and decompaction with deep tillage (DT) have been proposed to mitigate soil degradation in continuous cropping systems. However, the joint evaluation of these factors in established no-till systems is limited. This work aims to quantify corn yield losses generated by the cumulative degradation of soil quality of intensified no-till cropping systems, quantify to what extent yield losses could be mitigated by soil DT and N fertilization, and identify the most important process involved in yield reductions. Eleven experiments were installed during 2014 and 2015, on a typic Argiudoll with different soil quality generated by more than 50 years of contrasting land uses. A split-plot design was employed; the main plots were for DT (with and without) whereas the subplots were four N rates (0, 60, 120, and 240 kg ha?1). Overall, soil physical quality (SPQ) and carbon losses were associated with yield depletions. An increase in bulk density of 0.1 g cm?3 was associated with a 15.8% yield decrease. Deep tillage improved SPQ and modified water and N dynamics. However, these changes were small, variable, and did not affect corn growth. N fertilization improved yields but did not eliminate differences linked with land degradation and previous crop effects. Soil organic carbon had a better association with yields than bulk density, macroporosity, and penetration resistance. The results of this study highlight the importance of evaluating remediation practices to soil degradation under real conditions, regardless of its greater complexity for interpretation. 
© 2021 The Authors. Agronomy Journal © 2021 American Society of Agronomy	
Palabras-Clave: 	Continuous annual agriculture systems (CA); Crop-pasture rotations (CPR); Deep tillage (DT); Nitrogen (N); Soil organic carbon (SOC); Soil physical quality (SPQ).	
Categoría del tema: 	F01 Cultivo	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (102910-1) - PXI - AP - DD - PP/Agronomy Journal/2021 -  -  - DIS