Grasses have larger response than shrubs to increased nitrogen availability: A fertilization experiment in the Patagonian Steppe

Autores
Yahdjian, María Laura; Gherardi, Laureano; Sala, Osvaldo Esteban
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Nitrogen limits plant growth in almost all terrestrial ecosystems, even in low-precipitation ecosystems. Vegetation in arid ecosystems is usually composed of two dominant plant-functional types, grasses and shrubs, which have different rooting and water acquisition patterns. These plant-functional types may respond differently to N availability because they have different strategies to absorb and retranslocate N. We hypothesized that grasses are more N limited than shrubs, and consequently will show higher responses to N addition. To test this hypothesis, we added 50 Kg N.Ha-1.year-1 as NH4NO3 during two years in the Patagonian steppe, Argentina, and we evaluated the responses of aboveground net primary production and N concentration of green leaves of the dominant grass and shrub species. Grass biomass significantly (P=0.007) increased with increased N availability whereas shrub biomass did not change after two years of N addition. Shrubs have higher nitrogen concentration in green leaves than grasses, particularly the leguminous Adesmia volkmani, and showed no response to N addition whereas foliar N concentration of grasses significantly increased with N fertilization (P<0.05). Grasses may have a larger response to increase N availability than shrubs because they have a more open N economy absorbing up to 30% of their annual requirement from the soil. In contrast, shrubs have a closer N cycle, absorbing between 7 to 16% of their annual N requirement from the soil. Consequently shrubs depend less on soil N availability and are less responsive to increases in soil N.
Fil: Yahdjian, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina
Fil: Gherardi, Laureano. Arizona State University; Estados Unidos
Fil: Sala, Osvaldo Esteban. Arizona State University; Estados Unidos
Materia
Arid Ecosystems
Grasses
Manipulative Experiments
Fertilization
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/4176

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spelling Grasses have larger response than shrubs to increased nitrogen availability: A fertilization experiment in the Patagonian SteppeYahdjian, María LauraGherardi, LaureanoSala, Osvaldo EstebanArid EcosystemsGrassesManipulative ExperimentsFertilizationhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Nitrogen limits plant growth in almost all terrestrial ecosystems, even in low-precipitation ecosystems. Vegetation in arid ecosystems is usually composed of two dominant plant-functional types, grasses and shrubs, which have different rooting and water acquisition patterns. These plant-functional types may respond differently to N availability because they have different strategies to absorb and retranslocate N. We hypothesized that grasses are more N limited than shrubs, and consequently will show higher responses to N addition. To test this hypothesis, we added 50 Kg N.Ha-1.year-1 as NH4NO3 during two years in the Patagonian steppe, Argentina, and we evaluated the responses of aboveground net primary production and N concentration of green leaves of the dominant grass and shrub species. Grass biomass significantly (P=0.007) increased with increased N availability whereas shrub biomass did not change after two years of N addition. Shrubs have higher nitrogen concentration in green leaves than grasses, particularly the leguminous Adesmia volkmani, and showed no response to N addition whereas foliar N concentration of grasses significantly increased with N fertilization (P<0.05). Grasses may have a larger response to increase N availability than shrubs because they have a more open N economy absorbing up to 30% of their annual requirement from the soil. In contrast, shrubs have a closer N cycle, absorbing between 7 to 16% of their annual N requirement from the soil. Consequently shrubs depend less on soil N availability and are less responsive to increases in soil N.Fil: Yahdjian, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; ArgentinaFil: Gherardi, Laureano. Arizona State University; Estados UnidosFil: Sala, Osvaldo Esteban. Arizona State University; Estados UnidosElsevier2014-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/4176Yahdjian, María Laura; Gherardi, Laureano; Sala, Osvaldo Esteban; Grasses have larger response than shrubs to increased nitrogen availability: A fertilization experiment in the Patagonian Steppe; Elsevier; Journal of Arid Environments; 102; 1-2014; 17-200140-1963enginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0140196313002097info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jaridenv.2013.11.002info:eu-repo/semantics/altIdentifier/issn/0140-1963info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:24:30Zoai:ri.conicet.gov.ar:11336/4176instacron: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:34982025-09-29 10:24:30.664CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Grasses have larger response than shrubs to increased nitrogen availability: A fertilization experiment in the Patagonian Steppe
title Grasses have larger response than shrubs to increased nitrogen availability: A fertilization experiment in the Patagonian Steppe
spellingShingle Grasses have larger response than shrubs to increased nitrogen availability: A fertilization experiment in the Patagonian Steppe
Yahdjian, María Laura
Arid Ecosystems
Grasses
Manipulative Experiments
Fertilization
title_short Grasses have larger response than shrubs to increased nitrogen availability: A fertilization experiment in the Patagonian Steppe
title_full Grasses have larger response than shrubs to increased nitrogen availability: A fertilization experiment in the Patagonian Steppe
title_fullStr Grasses have larger response than shrubs to increased nitrogen availability: A fertilization experiment in the Patagonian Steppe
title_full_unstemmed Grasses have larger response than shrubs to increased nitrogen availability: A fertilization experiment in the Patagonian Steppe
title_sort Grasses have larger response than shrubs to increased nitrogen availability: A fertilization experiment in the Patagonian Steppe
dc.creator.none.fl_str_mv Yahdjian, María Laura
Gherardi, Laureano
Sala, Osvaldo Esteban
author Yahdjian, María Laura
author_facet Yahdjian, María Laura
Gherardi, Laureano
Sala, Osvaldo Esteban
author_role author
author2 Gherardi, Laureano
Sala, Osvaldo Esteban
author2_role author
author
dc.subject.none.fl_str_mv Arid Ecosystems
Grasses
Manipulative Experiments
Fertilization
topic Arid Ecosystems
Grasses
Manipulative Experiments
Fertilization
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Nitrogen limits plant growth in almost all terrestrial ecosystems, even in low-precipitation ecosystems. Vegetation in arid ecosystems is usually composed of two dominant plant-functional types, grasses and shrubs, which have different rooting and water acquisition patterns. These plant-functional types may respond differently to N availability because they have different strategies to absorb and retranslocate N. We hypothesized that grasses are more N limited than shrubs, and consequently will show higher responses to N addition. To test this hypothesis, we added 50 Kg N.Ha-1.year-1 as NH4NO3 during two years in the Patagonian steppe, Argentina, and we evaluated the responses of aboveground net primary production and N concentration of green leaves of the dominant grass and shrub species. Grass biomass significantly (P=0.007) increased with increased N availability whereas shrub biomass did not change after two years of N addition. Shrubs have higher nitrogen concentration in green leaves than grasses, particularly the leguminous Adesmia volkmani, and showed no response to N addition whereas foliar N concentration of grasses significantly increased with N fertilization (P<0.05). Grasses may have a larger response to increase N availability than shrubs because they have a more open N economy absorbing up to 30% of their annual requirement from the soil. In contrast, shrubs have a closer N cycle, absorbing between 7 to 16% of their annual N requirement from the soil. Consequently shrubs depend less on soil N availability and are less responsive to increases in soil N.
Fil: Yahdjian, María Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina
Fil: Gherardi, Laureano. Arizona State University; Estados Unidos
Fil: Sala, Osvaldo Esteban. Arizona State University; Estados Unidos
description Nitrogen limits plant growth in almost all terrestrial ecosystems, even in low-precipitation ecosystems. Vegetation in arid ecosystems is usually composed of two dominant plant-functional types, grasses and shrubs, which have different rooting and water acquisition patterns. These plant-functional types may respond differently to N availability because they have different strategies to absorb and retranslocate N. We hypothesized that grasses are more N limited than shrubs, and consequently will show higher responses to N addition. To test this hypothesis, we added 50 Kg N.Ha-1.year-1 as NH4NO3 during two years in the Patagonian steppe, Argentina, and we evaluated the responses of aboveground net primary production and N concentration of green leaves of the dominant grass and shrub species. Grass biomass significantly (P=0.007) increased with increased N availability whereas shrub biomass did not change after two years of N addition. Shrubs have higher nitrogen concentration in green leaves than grasses, particularly the leguminous Adesmia volkmani, and showed no response to N addition whereas foliar N concentration of grasses significantly increased with N fertilization (P<0.05). Grasses may have a larger response to increase N availability than shrubs because they have a more open N economy absorbing up to 30% of their annual requirement from the soil. In contrast, shrubs have a closer N cycle, absorbing between 7 to 16% of their annual N requirement from the soil. Consequently shrubs depend less on soil N availability and are less responsive to increases in soil N.
publishDate 2014
dc.date.none.fl_str_mv 2014-01
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/11336/4176
Yahdjian, María Laura; Gherardi, Laureano; Sala, Osvaldo Esteban; Grasses have larger response than shrubs to increased nitrogen availability: A fertilization experiment in the Patagonian Steppe; Elsevier; Journal of Arid Environments; 102; 1-2014; 17-20
0140-1963
url http://hdl.handle.net/11336/4176
identifier_str_mv Yahdjian, María Laura; Gherardi, Laureano; Sala, Osvaldo Esteban; Grasses have larger response than shrubs to increased nitrogen availability: A fertilization experiment in the Patagonian Steppe; Elsevier; Journal of Arid Environments; 102; 1-2014; 17-20
0140-1963
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0140196313002097
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jaridenv.2013.11.002
info:eu-repo/semantics/altIdentifier/issn/0140-1963
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
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
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