Potassium management effects on yield and quality of cassava varieties in tropical sandy soils

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorGazola, Bruno-
Autor(es): dc.creatorFernandes, Adalton M.-
Autor(es): dc.creatorHellmeister, Gabriela-
Autor(es): dc.creatorAbrami, Laura S.-
Autor(es): dc.creatorSilva, Rudieli M.-
Autor(es): dc.creatorSoratto, Rogério P.-
Data de aceite: dc.date.accessioned2025-08-21T21:41:50Z-
Data de disponibilização: dc.date.available2025-08-21T21:41:50Z-
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/10.1071/CP21229-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/230539-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/230539-
Descrição: dc.descriptionPotassium (K) fertilisation at planting time may not be sufficient to achieve high cassava yields. Experiments were conducted over two growing periods using sweet cassava (SC) variety IAC 576-70 and bitter cassava (BC) variety IAC 13 aiming to evaluate the effects of K fertilisation rate (0-150 kg K/ha) and timing of application (one, two, or three) on leaf K concentration, yield components, and storage-root and starch yields. The SC and BC varieties were grown in a randomized block design in a 3 × 4 + 1 factorial scheme with four replications during growing periods of 10 and 20 months respectively. For SC, split application of K at planting plus 3 months after planting (MP) or at planting plus 1.5 and 3 MP was more effective at increasing the marketable root yield, with greater rainfall at the beginning of the growing period. Split application of K at planting plus 3 MP also reduced the cooking time and cooked root firmness. For BC, split application of K at planting plus 12 MP more effectively increased the storage-root and starch yields; however, root yield response to K fertilisation in the second growing period, with greater rain intensity during the initial crop stages, was greater than in the first growing period. In K-deficient soils, the optimal K application rate for SC marketable root yield varied from 79 to 111 kg/ha when K was applied after 1.5 MP, and linear responses to K application rate occurred when K was applied earlier. For BC, the optimal K application rate varied from 75 to 92 kg K/ha. Our data suggest that K application times should be different for cassava varieties with short and long growing periods.-
Descrição: dc.descriptionSão Paulo State University (UNESP) College of Agricultural Sciences Avenida Universitária, 3780, Lageado Experimental Farm, São Paulo-
Descrição: dc.descriptionUNESP Center of Tropical Roots and Starches (CERAT) Avenida Universitária, 3780, Lageado Experimental Farm, São Paulo-
Descrição: dc.descriptionSão Paulo State University (UNESP) College of Agricultural Sciences Avenida Universitária, 3780, Lageado Experimental Farm, São Paulo-
Descrição: dc.descriptionUNESP Center of Tropical Roots and Starches (CERAT) Avenida Universitária, 3780, Lageado Experimental Farm, São Paulo-
Idioma: dc.languageen-
Relação: dc.relationCrop and Pasture Science-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectcooked root firmness-
Palavras-chave: dc.subjectcooking time-
Palavras-chave: dc.subjectK application timing-
Palavras-chave: dc.subjectK fertilisation rate-
Palavras-chave: dc.subjectManihot esculenta-
Palavras-chave: dc.subjectnutritional status-
Palavras-chave: dc.subjectstarch yield-
Palavras-chave: dc.subjectstorage root yield-
Título: dc.titlePotassium management effects on yield and quality of cassava varieties in tropical sandy soils-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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