Testing critical phosphorus dilution curves for potato cropped in tropical Oxisols of southeastern Brazil

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversidad Austral de Chile-
Autor(es): dc.creatorSoratto, Rogério P. [UNESP]-
Autor(es): dc.creatorSandaña, Patricio-
Autor(es): dc.creatorFernandes, Adalton M. [UNESP]-
Autor(es): dc.creatorMartins, Jéssyca D.L. [UNESP]-
Autor(es): dc.creatorJob, André L.G. [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:29:18Z-
Data de disponibilização: dc.date.available2022-02-22T00:29:18Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-04-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.eja.2020.126020-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/200075-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/200075-
Descrição: dc.descriptionOne 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.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionDepartment of Crop Science College of Agricultural Sciences São Paulo State University (UNESP)-
Descrição: dc.descriptionCenter of Tropical Roots and Starches São Paulo State University (UNESP)-
Descrição: dc.descriptionInstitute of Plant Production and Protection Universidad Austral de Chile, Campus Isla Teja-
Descrição: dc.descriptionDepartment of Crop Science College of Agricultural Sciences São Paulo State University (UNESP)-
Descrição: dc.descriptionCenter of Tropical Roots and Starches São Paulo State University (UNESP)-
Descrição: dc.descriptionFAPESP: 2010/04987-6-
Descrição: dc.descriptionFAPESP: 2013/04682-9-
Descrição: dc.descriptionCNPq: 456122/2014-1-
Descrição: dc.descriptionCNPq: 480757/2010-0-
Idioma: dc.languageen-
Relação: dc.relationEuropean Journal of Agronomy-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCritical P-
Palavras-chave: dc.subjectPhosphorus fertilization-
Palavras-chave: dc.subjectPhosphorus nutrition index-
Palavras-chave: dc.subjectSolanum tuberosum-
Palavras-chave: dc.subjectTuber yield-
Título: dc.titleTesting critical phosphorus dilution curves for potato cropped in tropical Oxisols of southeastern Brazil-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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