Potassium availability in Brazilian semiarid soils cultivated with melon

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dc.creatorKariolania Fortunato de Paiva
dc.creatorPedro Jorge da Silva Severo
dc.creatorFlávio Sarmento de Oliveira
dc.creatorLauriane Almeida dos Anjos Soares
dc.creatorJosinaldo Lopes Araujo
dc.date2020
dc.date.accessioned2026-07-07T04:30:31Z
dc.descriptionHaplic Vertisols and Typic Quartzipsamments are among the main classes of soils used for melon production in the Brazilian semiarid region. Potassium (K) is the nutrient most extracted by yellow melon fruits and, for this reason, high doses of potassium fertilizers are often applied to these soils. This study aimed to evaluate potassium fractions in soils of the Brazilian semiarid region, during the cultivation cycle of fertigated yellow melon. Two experiments were carried out with two types of soil (Haplic Vertisol and Typic Quartzipsamment). For the Vertisol, a 7 x 2 seven evaluation periods and two soil layers (0-20 cm and 20-40 cm) factorial arrangement was established, with four replications, totaling 56 experimental units. For the Quartzipsamment, a 9 x 2 nine collection times and two soil layers (0-20 cm and 20-40 cm) factorial arrangement was used, with four replications, totaling 72 experimental units. The non- exchangeable K fraction was dominant in both soils, mainly in the 0-20 cm layer, and represents an important reserve of this nutrient for melon cultivation, especially in Haplic Vertisols. The decrease in the concentrations of the soluble and exchangeable forms and the increase in the non-exchangeable form indicated an increase in the fixation of this nutrient, by fixation in the Vertisol and leaching in the Quartzipsamment, at the end of the melon cycle, when the amount of K accumulated by the plant was lower.
dc.formatapplication/pdf
dc.identifier1517-6398
dc.identifierhttps://www.redalyc.org/articulo.oa?id=253068033036
dc.identifierhttps://www.redalyc.org/journal/2530/253068033036/
dc.identifierhttps://www.redalyc.org/journal/2530/253068033036/html/
dc.identifierhttps://www.redalyc.org/journal/2530/253068033036/253068033036.epub
dc.identifierhttps://www.redalyc.org/journal/2530/253068033036/movil
dc.identifierhttps://doi.org/10.1590/1983-40632020v5063663
dc.identifier.urihttp://hdl.handle.net/123456789/463515
dc.languageen
dc.publisherUniversidade Federal de Goiás
dc.relationhttp://www.redalyc.org/revista.oa?id=2530
dc.rightsPesquisa Agropecuária Tropical
dc.sourcePesquisa Agropecuária Tropical (Brasil) Vol.50
dc.subjectAgrociencias
dc.titlePotassium availability in Brazilian semiarid soils cultivated with melon
dc.typeartículo científico

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Pesquisa Agropecuária Tropical - Universidade Federal de Goiás