Potassium Dynamics in Ruzigrass Rhizosphere

Registro completo de metadados
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorVolf, Marcelo Raphael-
Autor(es): dc.creatorGuimaraes, Tiara Moraes-
Autor(es): dc.creatorScudeletti, Daniele-
Autor(es): dc.creatorCruz, Igor Vilela-
Autor(es): dc.creatorRosolem, Ciro Antonio-
Data de aceite: dc.date.accessioned2021-03-11T01:14:11Z-
Data de disponibilização: dc.date.available2021-03-11T01:14:11Z-
Data de envio: dc.date.issued2019-10-04-
Data de envio: dc.date.issued2019-10-04-
Data de envio: dc.date.issued2018-01-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1590/18069657rbcs20170370-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/185081-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/185081-
Descrição: dc.descriptionRuzigrass (Urochola ruziziensis) has a large capacity to take up K from the soil, including non-exchangeable forms, and can play an important role in nutrient cycling in integrated production systems. However, K transport to roots of brachiarias is not well known, nor the nutrient dynamics in the rhizosphere, where a concentration gradient may be established towards the non-rhizospheric soil, creating a favorable environment for the release of non-exchangeable K. This study aimed to evaluate the effect of ruzigrass on K dynamics in the rhizosphere and on non-exchangeable K release. Ruzigrass was grown in pots filled with a Latossolo Vermelho Amarelo (Typic Hapludox) that was collected at 0.00-0.20 and 0.20-0.60 m layer from a cultivated area and fertilized with 0, 30, and 60 mg kg(-1) of K, plus a treatment with forest soil, used as control. Thirty days after plant emergence, soil samples were taken at the following distances from the roots: 0.5, 1.0, 1.5, 3.0, 5.0, and 10.0 mm. For the highest exchangeable K rate (60 mg dm(-3)), the exchangeable K level was higher from 0 to 0.5 mm of the roots for both soils (0.00-0.20 and 0.20-0.60 m). Therefore, more K was transported to the rhizosphere than the plant could take up. A depletion of exchangeable K observed in the rhizosphere resulted in the release of K from non-exchangeable forms, as observed in the soils from 0.00-0.20 (60 mg dm(-3)) and 0.20-0.60 m (without application of K). Ruzigrass grown on low K soils without fertilizer application results in a larger exchangeable K depletion zone than in soils that were fertilized or originally high in exchangeable K, showing a high potential for K cycling in the system.-
Formato: dc.format12-
Idioma: dc.languageen-
Publicador: dc.publisherSoc Brasileira De Ciencia Do Solo-
Relação: dc.relationRevista Brasileira De Ciencia Do Solo-
Direitos: dc.rightsclosedAccess-
Palavras-chave: dc.subjectUrochloa ruziziensis-
Palavras-chave: dc.subjectnon-exchangeable K-
Palavras-chave: dc.subjectexchangeable K-
Palavras-chave: dc.subjectrhizospheric soil-
Título: dc.titlePotassium Dynamics in Ruzigrass Rhizosphere-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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