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 | Acceso al texto completo restringido a Biblioteca INIA La Estanzuela. Por información adicional contacte bib_le@inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
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Fecha : |
03/09/2020 |
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Actualizado : |
03/09/2020 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
ERRECART, P,M.; MARINO, M.A.; AGNUSDEI, M.G.; LATTANZI, F.; DURAND, J-L |
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Afiliación : |
PEDRO MANUEL ERRECART, Unidad Integrada Balcarce (Instituto Nacional de Tecnología Agropecuaria EEA Balcarce-Facultad de Ciencias Agrarias Universidad Nacional de Mar del Plata), Ruta Nacional 226 km 73.5, Balcarce, Argentina.; MARÍA ALEJANDRA MARINO, Unidad Integrada Balcarce (Instituto Nacional de Tecnología Agropecuaria EEA Balcarce-Facultad de Ciencias Agrarias Universidad Nacional de Mar del Plata), Ruta Nacional 226 km 73.5, Balcarce, Argentina.; MÓNICA GRACIELA AGNUSDEI, Unidad Integrada Balcarce (Instituto Nacional de Tecnología Agropecuaria EEA Balcarce-Facultad de Ciencias Agrarias Universidad Nacional de Mar del Plata), Ruta Nacional 226 km 73.5, Balcarce, Argentina.; FERNANDO A. LATTANZI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JEAN-LOUIS DURAND, Unité de Recherche Pluridisciplinaire Prairies Plantes Fourragères (URP3F), INRA, Route de Saintes, Lusignan, France. |
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Título : |
The intensity of water stress dictates whether the N status of temperate-type perennial grass swards is affected by drought. |
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Fecha de publicación : |
2020 |
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Fuente / Imprenta : |
Field Crops Research, 15 October 2020, Volume 257, Article number 107928. Doi: https://doi.org/10.1016/j.fcr.2020.107928 |
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DOI : |
10.1016/j.fcr.2020.107928 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 28 February 2020/ Received in revised form 23 July 2020/ Accepted 27 July 2020. Corresponding author:
E-mail address: errecart.pedro@inta.gob.ar (P.M. Errecart). |
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Contenido : |
Abstract:Temperate-type, summer-active cool-season perennial grasses are frequently exposed to dry spells during the warm season due to the high atmospheric demand and fast soil desiccation. Since water availability is essential for sward nitrogen (N) uptake and most mineral N is located in the topsoil, water stress may hinder sward N nutrition if it reduces N supply. In hydro-halomorphic soils, imbalances between soil N supply and sward N demand during summer could be further aggravated by, first, the limited water holding capacity of the topsoil, and second, potential availability of water from deep, N-poor soil horizons that are kept moist by a shallow water table. The aim of this work was to quantify the effect of N and water availability on N status and productivity of temperate-type perennial swards growing in a hydro-halomorphic soil of the Flooding Pampa. During two consecutive years, shoot and root dynamics, as well as radiation capture, N nutrition index (NNI), soil water availability and leaf water potential were followed over six weeks long mid-summer regrowths of old stands (>9 years) of temperate-type tall fescue [Lolium arundinaceum (Schreb.) Darbysh.] sown on a typical Natraqualf soil in Balcarce, Argentina. Swards were either rainfed or irrigated and fertilized with either 40 or 200 kg de N ha?1. Root systems were large (5.8?9.3 Mg DM roots ha?1), but concentrated mostly in the 0.2 m topsoil (66%?75% of root biomass or length). Despite invariably high available water below 0.4 m throughout both experimental periods, rainfed swards faced transient episodes of water stress whenever the upper soil layer dried out. Tall fescue swards were strongly co-limited by water and N during summer, showing comparable, very high responses to both N addition and irrigation. Further, forage yield showed synergistic increases when swards received both supplemental water and N simultaneously. This was mainly due to consistent synergistic responses in radiation use efficiency and leaf lifespan. Sward NNI was depressed only by an historically severe drought but was not altered when water stress intensity was lower, close to average for the season in the area. Therefore, the major causes of typically low summer productivity of temperate-type tall fescue growing in hydro-halomorphic soils of the Flooding Pampa are the intrinsic effects of low N and low water availability, with only uncommonly extreme water stress episodes reducing yield indirectly through an aggravation of crop N status. MenosAbstract:Temperate-type, summer-active cool-season perennial grasses are frequently exposed to dry spells during the warm season due to the high atmospheric demand and fast soil desiccation. Since water availability is essential for sward nitrogen (N) uptake and most mineral N is located in the topsoil, water stress may hinder sward N nutrition if it reduces N supply. In hydro-halomorphic soils, imbalances between soil N supply and sward N demand during summer could be further aggravated by, first, the limited water holding capacity of the topsoil, and second, potential availability of water from deep, N-poor soil horizons that are kept moist by a shallow water table. The aim of this work was to quantify the effect of N and water availability on N status and productivity of temperate-type perennial swards growing in a hydro-halomorphic soil of the Flooding Pampa. During two consecutive years, shoot and root dynamics, as well as radiation capture, N nutrition index (NNI), soil water availability and leaf water potential were followed over six weeks long mid-summer regrowths of old stands (>9 years) of temperate-type tall fescue [Lolium arundinaceum (Schreb.) Darbysh.] sown on a typical Natraqualf soil in Balcarce, Argentina. Swards were either rainfed or irrigated and fertilized with either 40 or 200 kg de N ha?1. Root systems were large (5.8?9.3 Mg DM roots ha?1), but concentrated mostly in the 0.2 m topsoil (66%?75% of root biomass or length). Despite invariably high availa... Presentar Todo |
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Thesagro : |
ESTRES HIDRICO; NITROGEN. |
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NAL Tesauro : |
FORAGE YIELD; NITROGEN NUTRITION INDEX; RESOURCE CO-LIMITATION; ROOTS; WATER-NITROGEN INTERACTION. |
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Asunto categoría : |
-- |
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Marc : |
LEADER 03615naa a2200277 a 4500
001 1061293
005 2020-09-03
008 2020 bl uuuu u00u1 u #d
024 7 $a10.1016/j.fcr.2020.107928$2DOI
100 1 $aERRECART, P,M.
245 $aThe intensity of water stress dictates whether the N status of temperate-type perennial grass swards is affected by drought.$h[electronic resource]
260 $c2020
500 $aArticle history: Received 28 February 2020/ Received in revised form 23 July 2020/ Accepted 27 July 2020. Corresponding author: E-mail address: errecart.pedro@inta.gob.ar (P.M. Errecart).
520 $aAbstract:Temperate-type, summer-active cool-season perennial grasses are frequently exposed to dry spells during the warm season due to the high atmospheric demand and fast soil desiccation. Since water availability is essential for sward nitrogen (N) uptake and most mineral N is located in the topsoil, water stress may hinder sward N nutrition if it reduces N supply. In hydro-halomorphic soils, imbalances between soil N supply and sward N demand during summer could be further aggravated by, first, the limited water holding capacity of the topsoil, and second, potential availability of water from deep, N-poor soil horizons that are kept moist by a shallow water table. The aim of this work was to quantify the effect of N and water availability on N status and productivity of temperate-type perennial swards growing in a hydro-halomorphic soil of the Flooding Pampa. During two consecutive years, shoot and root dynamics, as well as radiation capture, N nutrition index (NNI), soil water availability and leaf water potential were followed over six weeks long mid-summer regrowths of old stands (>9 years) of temperate-type tall fescue [Lolium arundinaceum (Schreb.) Darbysh.] sown on a typical Natraqualf soil in Balcarce, Argentina. Swards were either rainfed or irrigated and fertilized with either 40 or 200 kg de N ha?1. Root systems were large (5.8?9.3 Mg DM roots ha?1), but concentrated mostly in the 0.2 m topsoil (66%?75% of root biomass or length). Despite invariably high available water below 0.4 m throughout both experimental periods, rainfed swards faced transient episodes of water stress whenever the upper soil layer dried out. Tall fescue swards were strongly co-limited by water and N during summer, showing comparable, very high responses to both N addition and irrigation. Further, forage yield showed synergistic increases when swards received both supplemental water and N simultaneously. This was mainly due to consistent synergistic responses in radiation use efficiency and leaf lifespan. Sward NNI was depressed only by an historically severe drought but was not altered when water stress intensity was lower, close to average for the season in the area. Therefore, the major causes of typically low summer productivity of temperate-type tall fescue growing in hydro-halomorphic soils of the Flooding Pampa are the intrinsic effects of low N and low water availability, with only uncommonly extreme water stress episodes reducing yield indirectly through an aggravation of crop N status.
650 $aFORAGE YIELD
650 $aNITROGEN NUTRITION INDEX
650 $aRESOURCE CO-LIMITATION
650 $aROOTS
650 $aWATER-NITROGEN INTERACTION
650 $aESTRES HIDRICO
650 $aNITROGEN
700 1 $aMARINO, M.A.
700 1 $aAGNUSDEI, M.G.
700 1 $aLATTANZI, F.
700 1 $aDURAND, J-L
773 $tField Crops Research, 15 October 2020, Volume 257, Article number 107928. Doi: https://doi.org/10.1016/j.fcr.2020.107928
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| Registros recuperados : 4 | |
| 1. |  | CRUZ, P.; LEZANA, L.; DURANTE, M.; JAURENA, M.; FIGARI, M.; DE OLIVEIRA, L.B.; THEAU, J.-P.; MASSA, E.; VIEGAS, J.; DE QUADROS, F.L.F. A functional classification of 63 common poaceae in the "campos" grasslands of South America. [Una clasificación funcional de 63 Poáceas comunes de los pastizales naturales de Sudamérica]. Ecologia Austral, August 2019, Volume 29, Issue 2, Pages 239-248. OPEN ACCESS. Article history: Recibido: 23 de Marzo de 2018 // Aceptado: 26 de Febrero de 2019.| Tipo: Artículos en Revistas Indexadas Internacionales | Circulación / Nivel : Internacional - -- |
| Biblioteca(s): INIA Tacuarembó. |
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| 3. | | FAGUNDES, R.Z.; QUADROS, F.L.F.; JAURENA, M. Efeito das condições climáticas e da oferta de forragem na resposta da recria bovina em campos nativos de fertilidade contrastante. [Resumen]. In: Reunión del Grupo Técnico en Forrajeras del Cono Sur, Grupo Campos, 24, 2017, Tacuarembó, Uruguay; Ayala, W.; Boggiano, P.; Álvarez, O.; eds. Bioma campos : Retomando un camino de oportunidades para una producción ganadera sustentable. Memorias. Tacuarembó (Uruguay): Grupo Campos, 2017.| Tipo: Abstracts/Resúmenes |
| Biblioteca(s): INIA Tacuarembó. |
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| 4. | | JAURENA, M.; DURANTE, M.; DEVINCENZI, T.; SAVIAN, J.V.; BENDERSKY, D.; MOOJEN, F.G.; PEREIRA, M.; SOCA, P.; QUADROS, F.L.F.; PIZZIO, R.; NABINGER, C.; CARVALHO, P.C.F.; LATTANZI, F. Native Grasslands at the Core: A New Paradigm of Intensification for the Campos of Southern South America to Increase Economic and Environmental Sustainability Front. Sustain. Food Syst., 05 March 2021, OPEN ACCESS. DOI: https://doi.org/10.3389/fsufs.2021.547834 Article history: Received: 31 March 2020, Accepted: 07 January 2021, Published: 05 March 2021. ACKNOWLEDGMENTS: The authors gratefully acknowledge Fiorella Cazulli for the
English corrections.Correspondence: Martín Jaurena...| Tipo: Artículos en Revistas Indexadas Internacionales | Circulación / Nivel : Internacional - -- |
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