Testing critical phosphorus dilution curves for potato cropped in tropical Oxisols of southeastern Brazil
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.eja.2020.126020 http://hdl.handle.net/11449/200075 |
Resumo: | One of the challenges of potato (Solanum tuberosum L.) production is to minimize phosphorus (P) fertilization without negatively affecting the yield progress. Therefore, critical P dilution curves [Pc = acW−b; where Pc is the critical P concentration (%); ac is the critical plant P concentration (%) for a total dry matter (DM) biomass of 1 Mg ha-1; W is the total DM biomass expressed in Mg ha-1; and coefficient b is dimensionless and represents the ratio between the relative decline in plant P concentration and the relative crop growth rate] have been developed recently to improve P fertilization management in potatoes. The aim of this study was to test critical P dilution curves for potato cultivated in São Paulo State, southeastern Brazil. Nine field experiments were conducted in Oxisols with Presin values ranging from 8 to 70 mg dm-3 (very low to high). In each experiment, treatments were different P rates (ranging from 0 to 448 kg P ha-1) or the combination of different cultivars and P rates. Wide ranges in tuber DM yield (0.7-7.9 Mg ha-1) and plant P concentration (0.13-0.36 %) were observed before vine killing in response to P rates, cultivars, and site-years. Tuber DM yields were related to total DM biomass (R2 = 0.98), while P uptake was related to both total DM biomass and total plant P concentration (p < 0.01). Relative tuber DM yields at harvest were closely related to P nutrition index (PNI) (p < 0.01, R2 = 0.82) calculated with the critical P dilution curve previously reported for potato under higher yielding environments. These results validate the critical P dilution curve (Pc = 0.391W-0.304) as a useful diagnostic tool for improving the P fertilization of potato crops systems in the tropical region of Brazil. |
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Testing critical phosphorus dilution curves for potato cropped in tropical Oxisols of southeastern BrazilCritical PPhosphorus fertilizationPhosphorus nutrition indexSolanum tuberosumTuber yieldOne of the challenges of potato (Solanum tuberosum L.) production is to minimize phosphorus (P) fertilization without negatively affecting the yield progress. Therefore, critical P dilution curves [Pc = acW−b; where Pc is the critical P concentration (%); ac is the critical plant P concentration (%) for a total dry matter (DM) biomass of 1 Mg ha-1; W is the total DM biomass expressed in Mg ha-1; and coefficient b is dimensionless and represents the ratio between the relative decline in plant P concentration and the relative crop growth rate] have been developed recently to improve P fertilization management in potatoes. The aim of this study was to test critical P dilution curves for potato cultivated in São Paulo State, southeastern Brazil. Nine field experiments were conducted in Oxisols with Presin values ranging from 8 to 70 mg dm-3 (very low to high). In each experiment, treatments were different P rates (ranging from 0 to 448 kg P ha-1) or the combination of different cultivars and P rates. Wide ranges in tuber DM yield (0.7-7.9 Mg ha-1) and plant P concentration (0.13-0.36 %) were observed before vine killing in response to P rates, cultivars, and site-years. Tuber DM yields were related to total DM biomass (R2 = 0.98), while P uptake was related to both total DM biomass and total plant P concentration (p < 0.01). Relative tuber DM yields at harvest were closely related to P nutrition index (PNI) (p < 0.01, R2 = 0.82) calculated with the critical P dilution curve previously reported for potato under higher yielding environments. These results validate the critical P dilution curve (Pc = 0.391W-0.304) as a useful diagnostic tool for improving the P fertilization of potato crops systems in the tropical region of Brazil.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Department of Crop Science College of Agricultural Sciences São Paulo State University (UNESP)Center of Tropical Roots and Starches São Paulo State University (UNESP)Institute of Plant Production and Protection Universidad Austral de Chile, Campus Isla TejaDepartment of Crop Science College of Agricultural Sciences São Paulo State University (UNESP)Center of Tropical Roots and Starches São Paulo State University (UNESP)FAPESP: 2010/04987-6FAPESP: 2013/04682-9CNPq: 456122/2014-1CNPq: 480757/2010-0Universidade Estadual Paulista (Unesp)Universidad Austral de ChileSoratto, Rogério P. [UNESP]Sandaña, PatricioFernandes, Adalton M. [UNESP]Martins, Jéssyca D.L. [UNESP]Job, André L.G. [UNESP]2020-12-12T01:57:04Z2020-12-12T01:57:04Z2020-04-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.eja.2020.126020European Journal of Agronomy, v. 115.1161-0301http://hdl.handle.net/11449/20007510.1016/j.eja.2020.1260202-s2.0-85079560709Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengEuropean Journal of Agronomyinfo:eu-repo/semantics/openAccess2024-04-12T13:49:39Zoai:repositorio.unesp.br:11449/200075Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-05-23T11:45:19.979723Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Testing critical phosphorus dilution curves for potato cropped in tropical Oxisols of southeastern Brazil |
title |
Testing critical phosphorus dilution curves for potato cropped in tropical Oxisols of southeastern Brazil |
spellingShingle |
Testing critical phosphorus dilution curves for potato cropped in tropical Oxisols of southeastern Brazil Soratto, Rogério P. [UNESP] Critical P Phosphorus fertilization Phosphorus nutrition index Solanum tuberosum Tuber yield |
title_short |
Testing critical phosphorus dilution curves for potato cropped in tropical Oxisols of southeastern Brazil |
title_full |
Testing critical phosphorus dilution curves for potato cropped in tropical Oxisols of southeastern Brazil |
title_fullStr |
Testing critical phosphorus dilution curves for potato cropped in tropical Oxisols of southeastern Brazil |
title_full_unstemmed |
Testing critical phosphorus dilution curves for potato cropped in tropical Oxisols of southeastern Brazil |
title_sort |
Testing critical phosphorus dilution curves for potato cropped in tropical Oxisols of southeastern Brazil |
author |
Soratto, Rogério P. [UNESP] |
author_facet |
Soratto, Rogério P. [UNESP] Sandaña, Patricio Fernandes, Adalton M. [UNESP] Martins, Jéssyca D.L. [UNESP] Job, André L.G. [UNESP] |
author_role |
author |
author2 |
Sandaña, Patricio Fernandes, Adalton M. [UNESP] Martins, Jéssyca D.L. [UNESP] Job, André L.G. [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidad Austral de Chile |
dc.contributor.author.fl_str_mv |
Soratto, Rogério P. [UNESP] Sandaña, Patricio Fernandes, Adalton M. [UNESP] Martins, Jéssyca D.L. [UNESP] Job, André L.G. [UNESP] |
dc.subject.por.fl_str_mv |
Critical P Phosphorus fertilization Phosphorus nutrition index Solanum tuberosum Tuber yield |
topic |
Critical P Phosphorus fertilization Phosphorus nutrition index Solanum tuberosum Tuber yield |
description |
One of the challenges of potato (Solanum tuberosum L.) production is to minimize phosphorus (P) fertilization without negatively affecting the yield progress. Therefore, critical P dilution curves [Pc = acW−b; where Pc is the critical P concentration (%); ac is the critical plant P concentration (%) for a total dry matter (DM) biomass of 1 Mg ha-1; W is the total DM biomass expressed in Mg ha-1; and coefficient b is dimensionless and represents the ratio between the relative decline in plant P concentration and the relative crop growth rate] have been developed recently to improve P fertilization management in potatoes. The aim of this study was to test critical P dilution curves for potato cultivated in São Paulo State, southeastern Brazil. Nine field experiments were conducted in Oxisols with Presin values ranging from 8 to 70 mg dm-3 (very low to high). In each experiment, treatments were different P rates (ranging from 0 to 448 kg P ha-1) or the combination of different cultivars and P rates. Wide ranges in tuber DM yield (0.7-7.9 Mg ha-1) and plant P concentration (0.13-0.36 %) were observed before vine killing in response to P rates, cultivars, and site-years. Tuber DM yields were related to total DM biomass (R2 = 0.98), while P uptake was related to both total DM biomass and total plant P concentration (p < 0.01). Relative tuber DM yields at harvest were closely related to P nutrition index (PNI) (p < 0.01, R2 = 0.82) calculated with the critical P dilution curve previously reported for potato under higher yielding environments. These results validate the critical P dilution curve (Pc = 0.391W-0.304) as a useful diagnostic tool for improving the P fertilization of potato crops systems in the tropical region of Brazil. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T01:57:04Z 2020-12-12T01:57:04Z 2020-04-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.eja.2020.126020 European Journal of Agronomy, v. 115. 1161-0301 http://hdl.handle.net/11449/200075 10.1016/j.eja.2020.126020 2-s2.0-85079560709 |
url |
http://dx.doi.org/10.1016/j.eja.2020.126020 http://hdl.handle.net/11449/200075 |
identifier_str_mv |
European Journal of Agronomy, v. 115. 1161-0301 10.1016/j.eja.2020.126020 2-s2.0-85079560709 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
European Journal of Agronomy |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1803045876187267072 |