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dc.contributor.author
Insua, Juan Ramón
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dc.contributor.author
Utsumi, Santiago A.
dc.contributor.author
Basso, Bruno
dc.date.available
2022-11-16T11:34:10Z
dc.date.issued
2019-04
dc.identifier.citation
Insua, Juan Ramón; Utsumi, Santiago A.; Basso, Bruno; Assessing and Modeling Pasture Growth Under Different Nitrogen Fertilizer and Defoliation Rates in Argentina and the United States; American Society of Agronomy; Agronomy Journal; 111; 2; 4-2019; 702-713
dc.identifier.issn
0002-1962
dc.identifier.uri
http://hdl.handle.net/11336/177925
dc.description.abstract
The objectives of this research were to (i) evaluate the effects of N fertilizer, irrigation, and residual pasture heights on pasture growth, (ii) validate the ability of the SALUS model to predict dynamics of pasture growth, and (iii) evaluate during long-term period the effects of using different N fertilizer levels and defoliation strategies on pasture growth, N fertilizer use, and water use efficiency (WUE). Eight single-season experiments were performed at plot scale (8 m2) in Buenos Aires (Argentina, ARG) and Michigan. In ARG different N fertilizer rates (from 0-500 kg N ha-1) were imposed on both rainfed and irrigated tall fescue [Lolium arundinaceum (Schreb.) Darbysh.] pasture during autumn, spring, and summer. In the United States, three residual pasture height treatments (30, 60, and 120 mm) were imposed on both tall fescue and ryegrass (Lolium perenne L.) pasture in the spring and summer. The SALUS was parameterized to simulate tall fescue and ryegrass growth using soil, weather, and different pasture treatments previously tested in ARG and the United States. Results showed that the SALUS accurately represented the response of herbage mass to irrigation and added N in the ARG site (RMSE < 650 kg DM ha-1) and to differences in residual pasture heights in the U.S. experiment (RMSE < 509 kg DM ha-1). Ten-year simulations (2000-2010) demonstrated that suitable combinations of N fertilizer and residual pasture heights can significantly improve the use of N fertilizer by ~300% and water by ~230% through increases in herbage production.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Society of Agronomy
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
BIOPHYSICAL SIMULATION
dc.subject
TEMPERATE GRASSES
dc.subject
WATER-NITROGEN INTERACTION
dc.subject
PASTURE MANAGEMENT
dc.subject.classification
Ganadería
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dc.subject.classification
Producción Animal y Lechería
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dc.subject.classification
CIENCIAS AGRÍCOLAS
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dc.title
Assessing and Modeling Pasture Growth Under Different Nitrogen Fertilizer and Defoliation Rates in Argentina and the United States
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-11-15T14:19:24Z
dc.journal.volume
111
dc.journal.number
2
dc.journal.pagination
702-713
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Insua, Juan Ramón. Universidad Nacional de Mar del Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina
dc.description.fil
Fil: Utsumi, Santiago A.. Michigan State University; Estados Unidos
dc.description.fil
Fil: Basso, Bruno. Michigan State University; Estados Unidos
dc.journal.title
Agronomy Journal
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.2134/agronj2018.07.0438
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