Analysis of yield response variability to nitrogen fertilization in experiments performed in the Argentine Pampas

Nitrogen (N) fertilization has become a common practice in corn and wheat crops in the Argentine Pampas during the past decade. In this region, great environmental variability determines erratic responses to fertilization. The quantity of data necessary for defining yield response models to N has no...

ver descrição completa

Detalhes bibliográficos
Autor: Alvarez, Roberto
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2008
País:Argentina
Recursos:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/16573
Acesso em linha:http://hdl.handle.net/11336/16573
Access Level:acceso abierto
Palavra-chave:Fertilization
Nitrogen
https://purl.org/becyt/ford/4.1
https://purl.org/becyt/ford/4
id AR_6022dd2d712fe10cb65fac7d766934a5
oai_identifier_str oai:ri.conicet.gov.ar:11336/16573
network_acronym_str AR
network_name_str Argentina
repository_id_str
spelling Analysis of yield response variability to nitrogen fertilization in experiments performed in the Argentine PampasAlvarez, RobertoFertilizationNitrogenhttps://purl.org/becyt/ford/4.1https://purl.org/becyt/ford/4Nitrogen (N) fertilization has become a common practice in corn and wheat crops in the Argentine Pampas during the past decade. In this region, great environmental variability determines erratic responses to fertilization. The quantity of data necessary for defining yield response models to N has not been investigated, and the relative yield transformation, combined with the total nutrient approach, has been widespread when analyzing fertilizer response results. The objectives were to determine the minimum data set necessary for fitting average yield functions suitable for fertilizer recommendation at regional scale and to investigate the consequences of using relative yield on N response functions when the total nutrient approach is used. Published results from two extensive fertilization networks, one with corn and the other with wheat, were used. Data were aggregated at different levels, because one single experiment to the entire network results, and yield response functions to N were fitted. Yield models tended to stability when a set of around 100 or more data points, generated in experiments performed across different sites and years, were used for fitting models with both crops. This amount of data was generated by performing 20 experiments in the corn network and 35 in the wheat network. Relative yield transformation allowed us to obtain models with lower dispersion than yield, but in the case of corn a biased model was generated that leads to underestimating fertilizer requirements. In wheat, similar fertilizer recommendations were produced from yield or relative yield functions. Response variability to fertilization must be addressed in the experimental area by increasing the amount of data used, rather than by applying the relative yield transformation.Fil: Alvarez, Roberto. Universidad de Buenos Aires. Facultad de Agronomia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario; ArgentinaTaylor & Francis2008-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/16573Alvarez, Roberto; Analysis of yield response variability to nitrogen fertilization in experiments performed in the Argentine Pampas; Taylor & Francis; Communications In Soil Science And Plant Analysis; 39; 7-8; 12-2008; 1235-12440010-3624enginfo:eu-repo/semantics/altIdentifier/url/http://www.tandfonline.com/doi/abs/10.1080/00103620801925943info:eu-repo/semantics/altIdentifier/doi/10.1080/00103620801925943info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:52:49Zoai:ri.conicet.gov.ar:11336/16573instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 13:52:49.612CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Analysis of yield response variability to nitrogen fertilization in experiments performed in the Argentine Pampas
title Analysis of yield response variability to nitrogen fertilization in experiments performed in the Argentine Pampas
spellingShingle Analysis of yield response variability to nitrogen fertilization in experiments performed in the Argentine Pampas
Alvarez, Roberto
Fertilization
Nitrogen
https://purl.org/becyt/ford/4.1
https://purl.org/becyt/ford/4
title_short Analysis of yield response variability to nitrogen fertilization in experiments performed in the Argentine Pampas
title_full Analysis of yield response variability to nitrogen fertilization in experiments performed in the Argentine Pampas
title_fullStr Analysis of yield response variability to nitrogen fertilization in experiments performed in the Argentine Pampas
title_full_unstemmed Analysis of yield response variability to nitrogen fertilization in experiments performed in the Argentine Pampas
title_sort Analysis of yield response variability to nitrogen fertilization in experiments performed in the Argentine Pampas
dc.creator.none.fl_str_mv Alvarez, Roberto
author Alvarez, Roberto
author_facet Alvarez, Roberto
author_role author
dc.subject.none.fl_str_mv Fertilization
Nitrogen
https://purl.org/becyt/ford/4.1
https://purl.org/becyt/ford/4
topic Fertilization
Nitrogen
https://purl.org/becyt/ford/4.1
https://purl.org/becyt/ford/4
description Nitrogen (N) fertilization has become a common practice in corn and wheat crops in the Argentine Pampas during the past decade. In this region, great environmental variability determines erratic responses to fertilization. The quantity of data necessary for defining yield response models to N has not been investigated, and the relative yield transformation, combined with the total nutrient approach, has been widespread when analyzing fertilizer response results. The objectives were to determine the minimum data set necessary for fitting average yield functions suitable for fertilizer recommendation at regional scale and to investigate the consequences of using relative yield on N response functions when the total nutrient approach is used. Published results from two extensive fertilization networks, one with corn and the other with wheat, were used. Data were aggregated at different levels, because one single experiment to the entire network results, and yield response functions to N were fitted. Yield models tended to stability when a set of around 100 or more data points, generated in experiments performed across different sites and years, were used for fitting models with both crops. This amount of data was generated by performing 20 experiments in the corn network and 35 in the wheat network. Relative yield transformation allowed us to obtain models with lower dispersion than yield, but in the case of corn a biased model was generated that leads to underestimating fertilizer requirements. In wheat, similar fertilizer recommendations were produced from yield or relative yield functions. Response variability to fertilization must be addressed in the experimental area by increasing the amount of data used, rather than by applying the relative yield transformation.
publishDate 2008
dc.date.none.fl_str_mv 2008-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/16573
Alvarez, Roberto; Analysis of yield response variability to nitrogen fertilization in experiments performed in the Argentine Pampas; Taylor & Francis; Communications In Soil Science And Plant Analysis; 39; 7-8; 12-2008; 1235-1244
0010-3624
url http://hdl.handle.net/11336/16573
identifier_str_mv Alvarez, Roberto; Analysis of yield response variability to nitrogen fertilization in experiments performed in the Argentine Pampas; Taylor & Francis; Communications In Soil Science And Plant Analysis; 39; 7-8; 12-2008; 1235-1244
0010-3624
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.tandfonline.com/doi/abs/10.1080/00103620801925943
info:eu-repo/semantics/altIdentifier/doi/10.1080/00103620801925943
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Taylor & Francis
publisher.none.fl_str_mv Taylor & Francis
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1799195448291885056
score 15.198674

Registos relacionados