Optimization of Leaf Nitrogen Concentration and Monitoring Time for Sustainable Potato Production in Tropics

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidad Austral de Chile-
Autor(es): dc.contributorUniversity of Minnesota-
Autor(es): dc.contributorRural Development Institute of Paraná - IAPAR-EMATER (IDR-Paraná)-
Autor(es): dc.creatorFernandes, Fabiana M.-
Autor(es): dc.creatorSoratto, Rogério P.-
Autor(es): dc.creatorSandaña, Patricio-
Autor(es): dc.creatorSouza, Emerson F. C.-
Autor(es): dc.creatorYagi, Renato-
Data de aceite: dc.date.accessioned2025-08-21T15:12:05Z-
Data de disponibilização: dc.date.available2025-08-21T15:12:05Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2021-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s42729-022-00843-7-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/230685-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/230685-
Descrição: dc.descriptionCrop nitrogen (N) status monitoring is required as a decision-making tool to optimize N management of current potato cultivars (Solanum tuberosum L.). Field experiments were conducted to assess the leaf N concentration (LNC) as a diagnostic tool of the N status of potatoes grown in tropical environments of southeastern Brazil. Treatments consisted of two cultivars (Agata and Electra) and five N managements, which varied in rates (0–320 kg N ha−1) and application timings. The LNC was monitored in the most recently matured leaves from 10 to 59 days after emergence (DAE). Total dry matter (DM) biomass and N uptake at vine killing (~ 85 DAE) and fresh tuber yield were also measured. High variation was observed in total DM biomass (3.53–9.75 Mg ha−1), N uptake (41–224 kg ha−1), and tuber yield (14–61 Mg ha−1), with most of the variations ascribed to N management (60–90%). High variation in LNC (68.0–30.8 g kg−1) was attributed to N management and leaf sampling date. Relative tuber yields were positively related to the LNC values across the potato cycle. The threshold value of LNC to reach 95% of maximum tuber yield linearly decreased from 17 to 59 DAE (i.e., from 283 to 999 cumulative growing degree days after emergence) in both potato cultivars. The reference values of LNC to ensure N sufficiency varied from 63.8 g kg−1 (17 DAE) to 52.6 g kg−1 (59 DAE). These outcomes can guide growers to adjust the supply of N according to potato N requirements up to mid-season, preventing the application of excess N fertilizer.-
Descrição: dc.descriptionDepartment of Crop Science College of Agricultural Sciences São Paulo State University (UNESP), Av. Universitária, 3780, SP-
Descrição: dc.descriptionCenter of Tropical Roots and Starches São Paulo State University (UNESP), SP-
Descrição: dc.descriptionInstitute of Plant Production and Protection Universidad Austral de Chile, Campus Isla Teja-
Descrição: dc.descriptionDepartment of Soil Water and Climate University of Minnesota-
Descrição: dc.descriptionRural Development Institute of Paraná - IAPAR-EMATER (IDR-Paraná), PR-
Descrição: dc.descriptionDepartment of Crop Science College of Agricultural Sciences São Paulo State University (UNESP), Av. Universitária, 3780, SP-
Descrição: dc.descriptionCenter of Tropical Roots and Starches São Paulo State University (UNESP), SP-
Idioma: dc.languageen-
Relação: dc.relationJournal of Soil Science and Plant Nutrition-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectDecision-making tool-
Palavras-chave: dc.subjectMineral nutrition-
Palavras-chave: dc.subjectN management-
Palavras-chave: dc.subjectN status-
Palavras-chave: dc.subjectSolanum tuberosum-
Título: dc.titleOptimization of Leaf Nitrogen Concentration and Monitoring Time for Sustainable Potato Production in Tropics-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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