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Metadados | Descrição | Idioma |
---|---|---|
Autor(es): dc.contributor | Universidade Estadual Paulista (Unesp) | - |
Autor(es): dc.contributor | Universidad Austral de Chile | - |
Autor(es): dc.creator | Soratto, Rogério P. [UNESP] | - |
Autor(es): dc.creator | Sandaña, Patricio | - |
Autor(es): dc.creator | Fernandes, Adalton M. [UNESP] | - |
Autor(es): dc.creator | Martins, Jéssyca D.L. [UNESP] | - |
Autor(es): dc.creator | Job, André L.G. [UNESP] | - |
Data de aceite: dc.date.accessioned | 2022-02-22T00:29:18Z | - |
Data de disponibilização: dc.date.available | 2022-02-22T00:29:18Z | - |
Data de envio: dc.date.issued | 2020-12-11 | - |
Data de envio: dc.date.issued | 2020-12-11 | - |
Data de envio: dc.date.issued | 2020-04-01 | - |
Fonte completa do material: dc.identifier | http://dx.doi.org/10.1016/j.eja.2020.126020 | - |
Fonte completa do material: dc.identifier | http://hdl.handle.net/11449/200075 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/11449/200075 | - |
Descrição: dc.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. | - |
Descrição: dc.description | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | - |
Descrição: dc.description | Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) | - |
Descrição: dc.description | Department of Crop Science College of Agricultural Sciences São Paulo State University (UNESP) | - |
Descrição: dc.description | Center of Tropical Roots and Starches São Paulo State University (UNESP) | - |
Descrição: dc.description | Institute of Plant Production and Protection Universidad Austral de Chile, Campus Isla Teja | - |
Descrição: dc.description | Department of Crop Science College of Agricultural Sciences São Paulo State University (UNESP) | - |
Descrição: dc.description | Center of Tropical Roots and Starches São Paulo State University (UNESP) | - |
Descrição: dc.description | FAPESP: 2010/04987-6 | - |
Descrição: dc.description | FAPESP: 2013/04682-9 | - |
Descrição: dc.description | CNPq: 456122/2014-1 | - |
Descrição: dc.description | CNPq: 480757/2010-0 | - |
Idioma: dc.language | en | - |
Relação: dc.relation | European Journal of Agronomy | - |
???dc.source???: dc.source | Scopus | - |
Palavras-chave: dc.subject | Critical P | - |
Palavras-chave: dc.subject | Phosphorus fertilization | - |
Palavras-chave: dc.subject | Phosphorus nutrition index | - |
Palavras-chave: dc.subject | Solanum tuberosum | - |
Palavras-chave: dc.subject | Tuber yield | - |
Título: dc.title | Testing critical phosphorus dilution curves for potato cropped in tropical Oxisols of southeastern Brazil | - |
Tipo de arquivo: dc.type | livro digital | - |
Aparece nas coleções: | Repositório Institucional - Unesp |
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