Fecha/hora: 20/05/2024 14:40:42

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	19/08/2021	
Fecha de la última actualización: 	19/08/2021	
Autoria: 	RUBIO, V.; DIAZ-ROSELLO, R.; QUINCKE, A.; VAN ES H.M.	
Afiliación: 	VALENTINA RUBIO DELLEPIANE, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; Section of Soil and Crop Sciences, School of Integrative Plant Science, Cornell University, USA.; ROBERTO MIGUEL DIAZ ROSSELLO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; Section of Soil and Crop Sciences, School of Integrative Plant Science, Cornell University, USA.; JUAN ANDRES QUINCKE WALDEN, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; HAROLD MATHIJSVAN ES, Section of Soil and Crop Sciences, School of Integrative Plant Science, Cornell University, Ithaca, USA.	
Título: 	Quantifying soil organic carbon's critical role in cereal productivity losses under annualized crop rotations.	
Año de publicación: 	2021	
Fuente/Imprenta: 	Agriculture, Ecosystems and Environment, 2021, Volume 321, Article number 107607. Open Access. Doi: https://doi.org/10.1016/j.agee.2021.107607	
ISSN: 	0167-8809	
DOI: 	10.1016/j.agee.2021.107607	
Idioma: 	Inglés	
Notas: 	Article history: Received 29 October 2020, Revised 16 June 2021, Accepted 30 July 2021, Available online 13 August 2021, To be published 1 November 2021.	
Contenido: 	ABSTRACT - Understanding the impact of soil degradation on crop productivity is essential for decision-makers to predict agronomic, economic, and environmental outcomes of agricultural operations. Soil organic carbon (SOC) is influenced by the cropping system and affects soil health through its effect on other soil physical, chemical, and biological properties. Data from a 56-year long-term experiment in Uruguay's Pampa region were analyzed to quantify the effects of soil degradation on wheat (Triticum aestivum L.), and barley (Hordeum vulgare) yields. A significant degree of soil degradation was generated by six rotations with variable annual crop and pasture proportions (0%, 33%, 50%, and 66% of non hardvest pasture). Yield records (n = 368) and annual values of 14 explanatory variables containing soil, climatic, and management indicators were evaluated using random forest regressions. Rotation-induced SOC variation ranged from 1.2% to 2.6%, and robust relationships between SOC, soil physical, chemical, and biological properties were established. Over time, yields increased in crop pasture systems but plateaued for the annualized crop rotation (0% pasture). Yield improvements due to agronomic technology advances partly mask soil degradation effects. SOC losses lead to a reduction in yield, even when the SOC level was above 2%. Thus, no critical level of SOC could be determined. SOC interacted with climate indicators to impact yield. This analysis confirms the central role of SOC in yield outcomes beyond nutrient availability, and its potential to represent a wide range of soil functions. Our findings indicate that crop rotations with a higher percentage annual vs. perennial crops negatively impact SOC, associated soil properties, and yield potential. © 2021 The Authors	
Palabras-Clave: 	Crop productivity; Random Forest; Soil organic carbon; Sustainable intensification.	
Categoría del tema: 	F01 Cultivo	
URL: 	https://www.sciencedirect.com/science/article/pii/S016788092100311X/pdfft?md5=14416e750bb5111daeffafc93a58ec6b&pid=1-s2.0-S016788092100311X-main.pdf	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (102812-1) - PXI - AP - DD - PP/Agric., Ecosys. & Envir. 2021 -  -  - DIS