Fecha/hora: 16/06/2024 09:11:43

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	09/04/2021	
Fecha de la última actualización: 	15/06/2022	
Autoria: 	PINTO, P.; RUBIO, G.; GUTIERREZ, F.; SAWCHIK, J.; ARANA, S.; PIÑEIRO, G.	
Afiliación: 	PRISCILA PINTO, Laboratorio de Análisis Regional y Teledetección (LART), IFEVA, Universidad de Buenos Aires, CONICET, Facultad de Agronomía, Buenos Aires, Argentina; GERARDO RUBIO, Soil Fertility and Fertilizers and INBA (CONICET- UBA), Buenos Aires, Argentina; FELIX ALBERTO GUTIERREZ ZAMIT, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JORGE SAWCHIK PINTOS, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; SANTIAGO ARANA, Montevideo, Uruguay; GERVASIO PIÑEIRO, Departamento de Sistemas Ambientales, Facultad de Agronomía, Universidad de la República, Montevideo, Uruguay.	
Título: 	Variable root:shoot ratios and plant nitrogen concentrations discourage using just aboveground biomass to select legume service crops.	
Año de publicación: 	2021	
Fuente/Imprenta: 	Plant and Soil, 2021, volume 463, pages 347-358. doi: https://doi.org/10.1007/s11104-021-04916-x	
ISSN: 	0032-079X	
DOI: 	10.1007/s11104-021-04916-x	
Idioma: 	Inglés	
Notas: 	Article history: Received 30 July 2020; Accepted 8 March 2021; Published online 22 March 2021; Issue Date June 2021.
Responsible Editor: Euan K James.
This work was supported by INIA (N-5271 and N-5373) and CONICET (PIP-0555).	
Contenido: 	ABSTRACT.
Aims: Comparing different winter legume species by plant traits that determine their contributions to ecosystems as service crops. Since root biomass determines soil organic matter formation and biological nitrogen fixation (BNF) increases soil organic nitrogen stock, those plant traits are more suitable than shoot biomass to select service crops. Methods: We evaluated shoot and root biomass and BNF (using 15N natural abundance method) of 10 winter legume service crop species under field conditions, in two consecutive years. Results: The legumes significantly varied in shoot (3.4 to 9.1 Mg ha?1 year?1) and root biomass (0.8 to 1.3 Mg ha?1 year?1) and in the proportion and the amount of biologically fixed nitrogen (36?61% and 43?121 kg of N ha?1, respectively). Whereas shoot biomass varied between years, root and BNF were rather constant determining a low correlation between the variables. Among the evaluated species, Trifolium pratense and T. alexandrinum were the top-ranked species for the evaluated conditions, showing the largest amount of root biomass (~ 1.3 Mg ha?1 year?1) and BNF (~ 112 kg of N ha?1 year?1). Conclusions: Selecting service crops species aimed to increase soil organic matter based only on shoot biomass may be insufficient. As a consequence, we highlight the importance of performing breeding programs aimed to increase, in addition to crop yield or shoot biomass production, other plant traits such as root biomass or biological nitrogen fixation that provide key regulating and supporting ecosystem services. 
© 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG.	
Palabras-Clave: 	Agroecology; Belowground biomass; Biological nitrogen fixation; Cover crops.	
Thesagro: 	AGROECOLOGÍA.	
Categoría del tema: 	F01 Cultivo	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (102636-1) - PXI - AP - DD - PP/PLANT SOIL/2021 -  -  - DIS