Foliar-applied urea at bloom improves early fruit growth and nitrogen status of spur leaves in pear trees, cv. Williams Bon Chretien

Autores
Curetti, Mariela; Sanchez, Enrique Eduardo; Tagliavini, Massimo; Gioacchini, Paola
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The fruit size of early ripening pear varieties is one of the most important attributes for its quality. In pear (Pyrus communis L.) the thinning effect of urea is controversial, even if urea sprays increase in general the average fruit size. We therefore tested the hypothesis that foliar-applied urea at bloom also plays an important nutritional role. Trials were carried out in two orchards of the experimental farm of the INTA Alto Valle research station, in the province of Rio Negro, Argentina on mature trees of the cv. “Williams Bon chretien” on seedling. Urea (5%, w/v) application at full bloom had a slight effect of fruit thinning of fruitlets, but increased fruit size and the number of cells per fruit. Sprayed spurs showed larger fruit weight before a significant difference in fruit number per spur was observed. The uptake of N from urea, measured by the aid 15N techniques, enhanced N concentration and contents of flowers and spur leaves by about 10%. Although we cannot exclude that the thinning effect of urea has contributed to the enhancing of the fruit size and the number of cells per fruits, our data indicated that before the thinning effect of urea occurred, the fruit size already benefited from the foliar N supply due to an enhanced leaf and flower N concentration. Due to the both the thinning and the nutritional effects, the supply of urea early of the season is therefore a powerful and relatively inexpensive tool for enhancing fruit size in pear trees.
EEA Alto Valle
Fil: Curetti, Mariela. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; Argentina
Fil: Sánchez, Enrique Eduardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; Argentina
Fil: Tagliavini, Massimo. Free University of Bozen-Bolzano. Faculty of Science and Technology; Italia
Fil: Gioacchini, Paola. University of Bologna. Department of Agro-environmental Science and Technology; Italia
Fuente
Scientia Horticulturae 150 : 16–21 (February 2013)
Materia
Pyrus communis
Aclareo
Supresión de Frutos
Nitrógeno
Thinning
Defruiting
Nitrogen
Pears
Pera
Cell Number
Fruit Thinning
Leaf Uptake
Numero de Celular
Aclareo de Frutos
Absorción Foliar
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/23415
Acceder
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oai_identifier_str oai:localhost:20.500.12123/23415
network_acronym_str INTADig
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network_name_str INTA Digital (INTA)
spelling Foliar-applied urea at bloom improves early fruit growth and nitrogen status of spur leaves in pear trees, cv. Williams Bon ChretienCuretti, MarielaSanchez, Enrique EduardoTagliavini, MassimoGioacchini, PaolaPyrus communisAclareoSupresión de FrutosNitrógenoThinningDefruitingNitrogenPearsPeraCell NumberFruit ThinningLeaf UptakeNumero de CelularAclareo de FrutosAbsorción FoliarThe fruit size of early ripening pear varieties is one of the most important attributes for its quality. In pear (Pyrus communis L.) the thinning effect of urea is controversial, even if urea sprays increase in general the average fruit size. We therefore tested the hypothesis that foliar-applied urea at bloom also plays an important nutritional role. Trials were carried out in two orchards of the experimental farm of the INTA Alto Valle research station, in the province of Rio Negro, Argentina on mature trees of the cv. “Williams Bon chretien” on seedling. Urea (5%, w/v) application at full bloom had a slight effect of fruit thinning of fruitlets, but increased fruit size and the number of cells per fruit. Sprayed spurs showed larger fruit weight before a significant difference in fruit number per spur was observed. The uptake of N from urea, measured by the aid 15N techniques, enhanced N concentration and contents of flowers and spur leaves by about 10%. Although we cannot exclude that the thinning effect of urea has contributed to the enhancing of the fruit size and the number of cells per fruits, our data indicated that before the thinning effect of urea occurred, the fruit size already benefited from the foliar N supply due to an enhanced leaf and flower N concentration. Due to the both the thinning and the nutritional effects, the supply of urea early of the season is therefore a powerful and relatively inexpensive tool for enhancing fruit size in pear trees.EEA Alto ValleFil: Curetti, Mariela. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; ArgentinaFil: Sánchez, Enrique Eduardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; ArgentinaFil: Tagliavini, Massimo. Free University of Bozen-Bolzano. Faculty of Science and Technology; ItaliaFil: Gioacchini, Paola. University of Bologna. Department of Agro-environmental Science and Technology; ItaliaElsevier2025-08-12T14:40:20Z2025-08-12T14:40:20Z2013-02-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/23415https://www.sciencedirect.com/science/article/pii/S03044238120050800304-4238https://doi.org/10.1016/j.scienta.2012.10.022Scientia Horticulturae 150 : 16–21 (February 2013)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)2025-09-04T09:51:14Zoai:localhost:20.500.12123/23415instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-04 09:51:14.782INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Foliar-applied urea at bloom improves early fruit growth and nitrogen status of spur leaves in pear trees, cv. Williams Bon Chretien
title Foliar-applied urea at bloom improves early fruit growth and nitrogen status of spur leaves in pear trees, cv. Williams Bon Chretien
spellingShingle Foliar-applied urea at bloom improves early fruit growth and nitrogen status of spur leaves in pear trees, cv. Williams Bon Chretien
Curetti, Mariela
Pyrus communis
Aclareo
Supresión de Frutos
Nitrógeno
Thinning
Defruiting
Nitrogen
Pears
Pera
Cell Number
Fruit Thinning
Leaf Uptake
Numero de Celular
Aclareo de Frutos
Absorción Foliar
title_short Foliar-applied urea at bloom improves early fruit growth and nitrogen status of spur leaves in pear trees, cv. Williams Bon Chretien
title_full Foliar-applied urea at bloom improves early fruit growth and nitrogen status of spur leaves in pear trees, cv. Williams Bon Chretien
title_fullStr Foliar-applied urea at bloom improves early fruit growth and nitrogen status of spur leaves in pear trees, cv. Williams Bon Chretien
title_full_unstemmed Foliar-applied urea at bloom improves early fruit growth and nitrogen status of spur leaves in pear trees, cv. Williams Bon Chretien
title_sort Foliar-applied urea at bloom improves early fruit growth and nitrogen status of spur leaves in pear trees, cv. Williams Bon Chretien
dc.creator.none.fl_str_mv Curetti, Mariela
Sanchez, Enrique Eduardo
Tagliavini, Massimo
Gioacchini, Paola
author Curetti, Mariela
author_facet Curetti, Mariela
Sanchez, Enrique Eduardo
Tagliavini, Massimo
Gioacchini, Paola
author_role author
author2 Sanchez, Enrique Eduardo
Tagliavini, Massimo
Gioacchini, Paola
author2_role author
author
author
dc.subject.none.fl_str_mv Pyrus communis
Aclareo
Supresión de Frutos
Nitrógeno
Thinning
Defruiting
Nitrogen
Pears
Pera
Cell Number
Fruit Thinning
Leaf Uptake
Numero de Celular
Aclareo de Frutos
Absorción Foliar
topic Pyrus communis
Aclareo
Supresión de Frutos
Nitrógeno
Thinning
Defruiting
Nitrogen
Pears
Pera
Cell Number
Fruit Thinning
Leaf Uptake
Numero de Celular
Aclareo de Frutos
Absorción Foliar
dc.description.none.fl_txt_mv The fruit size of early ripening pear varieties is one of the most important attributes for its quality. In pear (Pyrus communis L.) the thinning effect of urea is controversial, even if urea sprays increase in general the average fruit size. We therefore tested the hypothesis that foliar-applied urea at bloom also plays an important nutritional role. Trials were carried out in two orchards of the experimental farm of the INTA Alto Valle research station, in the province of Rio Negro, Argentina on mature trees of the cv. “Williams Bon chretien” on seedling. Urea (5%, w/v) application at full bloom had a slight effect of fruit thinning of fruitlets, but increased fruit size and the number of cells per fruit. Sprayed spurs showed larger fruit weight before a significant difference in fruit number per spur was observed. The uptake of N from urea, measured by the aid 15N techniques, enhanced N concentration and contents of flowers and spur leaves by about 10%. Although we cannot exclude that the thinning effect of urea has contributed to the enhancing of the fruit size and the number of cells per fruits, our data indicated that before the thinning effect of urea occurred, the fruit size already benefited from the foliar N supply due to an enhanced leaf and flower N concentration. Due to the both the thinning and the nutritional effects, the supply of urea early of the season is therefore a powerful and relatively inexpensive tool for enhancing fruit size in pear trees.
EEA Alto Valle
Fil: Curetti, Mariela. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; Argentina
Fil: Sánchez, Enrique Eduardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; Argentina
Fil: Tagliavini, Massimo. Free University of Bozen-Bolzano. Faculty of Science and Technology; Italia
Fil: Gioacchini, Paola. University of Bologna. Department of Agro-environmental Science and Technology; Italia
description The fruit size of early ripening pear varieties is one of the most important attributes for its quality. In pear (Pyrus communis L.) the thinning effect of urea is controversial, even if urea sprays increase in general the average fruit size. We therefore tested the hypothesis that foliar-applied urea at bloom also plays an important nutritional role. Trials were carried out in two orchards of the experimental farm of the INTA Alto Valle research station, in the province of Rio Negro, Argentina on mature trees of the cv. “Williams Bon chretien” on seedling. Urea (5%, w/v) application at full bloom had a slight effect of fruit thinning of fruitlets, but increased fruit size and the number of cells per fruit. Sprayed spurs showed larger fruit weight before a significant difference in fruit number per spur was observed. The uptake of N from urea, measured by the aid 15N techniques, enhanced N concentration and contents of flowers and spur leaves by about 10%. Although we cannot exclude that the thinning effect of urea has contributed to the enhancing of the fruit size and the number of cells per fruits, our data indicated that before the thinning effect of urea occurred, the fruit size already benefited from the foliar N supply due to an enhanced leaf and flower N concentration. Due to the both the thinning and the nutritional effects, the supply of urea early of the season is therefore a powerful and relatively inexpensive tool for enhancing fruit size in pear trees.
publishDate 2013
dc.date.none.fl_str_mv 2013-02-04
2025-08-12T14:40:20Z
2025-08-12T14:40:20Z
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/20.500.12123/23415
https://www.sciencedirect.com/science/article/pii/S0304423812005080
0304-4238
https://doi.org/10.1016/j.scienta.2012.10.022
url http://hdl.handle.net/20.500.12123/23415
https://www.sciencedirect.com/science/article/pii/S0304423812005080
https://doi.org/10.1016/j.scienta.2012.10.022
identifier_str_mv 0304-4238
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv Scientia Horticulturae 150 : 16–21 (February 2013)
reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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score 12.623145

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