Sweetpotato responses to potassium rate and timing in tropical sandy soils

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorFigueiredo, Ricardo T.-
Autor(es): dc.creatorFernandes, Adalton M.-
Autor(es): dc.creatorGarreto, Francisca G. S.-
Autor(es): dc.creatorSilva, Jéssica A.-
Autor(es): dc.creatorNunes, Jason G. S.-
Autor(es): dc.creatorVargas, Pablo F.-
Data de aceite: dc.date.accessioned2025-08-21T19:55:06Z-
Data de disponibilização: dc.date.available2025-08-21T19:55:06Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2022-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1002/agj2.21364-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/248957-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/248957-
Descrição: dc.descriptionThe response of sweetpotato [Ipomoea batatas (L.) Lam.] to potassium (K) can vary based on soil K availability and the rate and timing of K application. This study evaluated the effects of K application rate and timing on leaf K concentration and yield attributes of sweetpotatoes grown in tropical sandy soils with different K availabilities. Treatments had three rates (60, 120, and 240 kg ha−1 K2O) and four timings (pl, the full rate at planting; pl-1.3, 1/2 rate at planting plus 1/2 at 1.3 months after planting [MP]; pl-3, 1/2 rate at planting plus 1/2 at 3 MP; pl-1.3–3, 1/3 rate at planting plus 1/3 each at 1.3 and 3 MP), including a control (without K application). The benefits of K timings and application rates on sweetpotato yield were greater in K-deficient soils with the maximum yield of sweetpotato (25.8–34.3 Mg ha−1) at the estimated rate of 153–179 kg ha−1 K2O in three application times. In soil with medium exchangeable K, the maximum total root yield (28.5–34.2 Mg ha−1) occurred at an optimum estimated rate of 113–122 kg ha−1 K2O. In soils with high exchangeable K, K application rates reduced the yield of roots or starch, and no K deficiency occurred in the unfertilized K treatments. To obtain high storage root and starch yields in sweetpotatoes grown in K-deficient tropical sandy soils, there should be three K applications, and K application rates should be based on K levels already available in the soil.-
Descrição: dc.descriptionCollege of Agricultural Sciences São Paulo State University (UNESP), São Paulo-
Descrição: dc.descriptionCenter of Tropical Roots and Starches (CERAT) São Paulo State University (UNESP), São Paulo-
Descrição: dc.descriptionFaculty of Agricultural Sciences of Vale do Ribeira (FCAVR) São Paulo State University (UNESP), São Paulo-
Descrição: dc.descriptionCollege of Agricultural Sciences São Paulo State University (UNESP), São Paulo-
Descrição: dc.descriptionCenter of Tropical Roots and Starches (CERAT) São Paulo State University (UNESP), São Paulo-
Descrição: dc.descriptionFaculty of Agricultural Sciences of Vale do Ribeira (FCAVR) São Paulo State University (UNESP), São Paulo-
Idioma: dc.languageen-
Relação: dc.relationAgronomy Journal-
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Título: dc.titleSweetpotato responses to potassium rate and timing in tropical sandy soils-
Tipo de arquivo: dc.typelivro digital-
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