Critical potassium dilution curve for potato crops

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Autor(es): dc.contributorUniversidad Austral de Chile-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorInstituto de Investigaciones Agropecuarias (INIA-Quilamapu)-
Autor(es): dc.contributorKansas State University-
Autor(es): dc.contributorP. Sandaña and R.P. Soratto contributed equally to this study.-
Autor(es): dc.creatorSandaña, Patricio-
Autor(es): dc.creatorSoratto, Rogério P.-
Autor(es): dc.creatorSilva, Júlio César de A.-
Autor(es): dc.creatorValenzuela, Alfonso-
Autor(es): dc.creatorParecido, Renan J.-
Autor(es): dc.creatorFernandes, Adalton M.-
Autor(es): dc.creatorCiampitti, Ignacio A.-
Data de aceite: dc.date.accessioned2025-08-21T23:41:36Z-
Data de disponibilização: dc.date.available2025-08-21T23:41:36Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-08-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.fcr.2024.109492-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/297034-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/297034-
Descrição: dc.descriptionContext or problem: Proper potassium (K) nutrition is a key management factor to attain both high tuber yields and quality in potato (Solanum tuberosum L.) crop. Therefore, developing diagnostic tools to assess crop K status via utilization of a critical K dilution curve (Kcr = aW-b) and calculation of the K nutrition index (KNI) is essential to advance K fertilization management in potato crops. Objective or research question: The aims of this study were to: (i) compute and compare different critical K dilution curves via a hierarchical Bayesian approach for different genotype × environment × management (G × E × M) scenarios and (ii) assess the relationship between tuber yield and K nutrition index (KNI) tested under diverse G × E × M scenarios. Methods: Five field experiments were conducted in Brazil (exp. 1 and 2) and Chile (exp. 3–5) during the 2020–2022 growing seasons, using four to five K fertilization rates (0–500 kg K ha−1) and two cultivars (Asterix or Patagonia-INIA). A hierarchical Bayesian approach was applied to quantify the parameters of the dilution curve and their uncertainties under eight G × E × M scenarios. Results: From all those curves, a generic critical dilution K curve was established under those scenarios [(Kcr (%) = 6.32 W−0.27)], for a broad range of variation of total fresh tuber yield (27–98 Mg ha−1), total dry plant biomass (1.1–22.6 Mg ha−1), and plant K concentration (1.3–6.9 %). The integrated KNI described the relative tuber yield (RY) significantly (p < 0.01; R2 = 0.78) by a linear function, reaching the maximum RY with a KNI value of 1. Furthermore, a similar pattern was observed between RY and instantaneous KNI calculated from one sample date from an independent dataset. Conclusions: A generic critical dilution curve for K was determined as the best model across different G × E × M scenarios. Thus, supporting the concept of using a generic K dilution curve rather than specific curves for different cultivars and/or environments. Implications or significance: This critical K dilution curve is a valuable tool for quantifying KNI and improving the effective use of this nutrient for potato production systems under diverse environments.-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionInstitute of Plant Production and Protection Faculty of Agricultural and Food Sciences Universidad Austral de Chile, Campus Isla Teja-
Descrição: dc.descriptionDept. of Crop Science College of Agricultural Sciences São Paulo State University (UNESP), SP-
Descrição: dc.descriptionCenter of Tropical Roots and Starches São Paulo State University (UNESP), SP-
Descrição: dc.descriptionInstituto de Investigaciones Agropecuarias (INIA-Quilamapu), Av. Vicente Méndez 515-
Descrição: dc.descriptionDepartment of Agronomy Kansas State University, 2004 Throckmorton Plant Science Center-
Descrição: dc.descriptionP. Sandaña and R.P. Soratto contributed equally to this study.-
Descrição: dc.descriptionDept. of Crop Science College of Agricultural Sciences São Paulo State University (UNESP), SP-
Descrição: dc.descriptionCenter of Tropical Roots and Starches São Paulo State University (UNESP), SP-
Descrição: dc.descriptionCNPq: 305837/2022–2-
Idioma: dc.languageen-
Relação: dc.relationField Crops Research-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectBayesian-
Palavras-chave: dc.subjectConcentration-
Palavras-chave: dc.subjectKNI-
Palavras-chave: dc.subjectSolanum tuberosum-
Palavras-chave: dc.subjectTuber-
Título: dc.titleCritical potassium dilution curve for potato crops-
Tipo de arquivo: dc.typelivro digital-
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