Potassium Dynamics in Ruzigrass Rhizosphere
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/18069657rbcs20170370 http://hdl.handle.net/11449/185081 |
Resumo: | Ruzigrass (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. |
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Potassium Dynamics in Ruzigrass RhizosphereUrochloa ruziziensisnon-exchangeable Kexchangeable Krhizospheric soilRuzigrass (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.Univ Estadual Paulista, Fac Ciencias Agron, Area Agr, Posgrad Agron, Botucatu, SP, BrazilUniv Estadual Paulista, Fac Ciencias Agron, Dept Prod & Melhoramento Vegetal, Botucatu, SP, BrazilUniv Estadual Paulista, Fac Ciencias Agron, Area Agr, Posgrad Agron, Botucatu, SP, BrazilUniv Estadual Paulista, Fac Ciencias Agron, Dept Prod & Melhoramento Vegetal, Botucatu, SP, BrazilSoc Brasileira De Ciencia Do SoloUniversidade Estadual Paulista (Unesp)Volf, Marcelo Raphael [UNESP]Guimaraes, Tiara Moraes [UNESP]Scudeletti, Daniele [UNESP]Cruz, Igor Vilela [UNESP]Rosolem, Ciro Antonio [UNESP]2019-10-04T12:32:35Z2019-10-04T12:32:35Z2018-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article12application/pdfhttp://dx.doi.org/10.1590/18069657rbcs20170370Revista Brasileira De Ciencia Do Solo. Vicosa: Soc Brasileira De Ciencia Do Solo, v. 42, 12 p., 2018.0100-0683http://hdl.handle.net/11449/18508110.1590/18069657rbcs20170370S0100-06832018000100531WOS:000450845900001S0100-06832018000100531.pdf57207758732595280000-0003-2001-0874Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRevista Brasileira De Ciencia Do Soloinfo:eu-repo/semantics/openAccess2024-04-30T15:54:22Zoai:repositorio.unesp.br:11449/185081Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-04-30T15:54:22Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Potassium Dynamics in Ruzigrass Rhizosphere |
title |
Potassium Dynamics in Ruzigrass Rhizosphere |
spellingShingle |
Potassium Dynamics in Ruzigrass Rhizosphere Volf, Marcelo Raphael [UNESP] Urochloa ruziziensis non-exchangeable K exchangeable K rhizospheric soil |
title_short |
Potassium Dynamics in Ruzigrass Rhizosphere |
title_full |
Potassium Dynamics in Ruzigrass Rhizosphere |
title_fullStr |
Potassium Dynamics in Ruzigrass Rhizosphere |
title_full_unstemmed |
Potassium Dynamics in Ruzigrass Rhizosphere |
title_sort |
Potassium Dynamics in Ruzigrass Rhizosphere |
author |
Volf, Marcelo Raphael [UNESP] |
author_facet |
Volf, Marcelo Raphael [UNESP] Guimaraes, Tiara Moraes [UNESP] Scudeletti, Daniele [UNESP] Cruz, Igor Vilela [UNESP] Rosolem, Ciro Antonio [UNESP] |
author_role |
author |
author2 |
Guimaraes, Tiara Moraes [UNESP] Scudeletti, Daniele [UNESP] Cruz, Igor Vilela [UNESP] Rosolem, Ciro Antonio [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Volf, Marcelo Raphael [UNESP] Guimaraes, Tiara Moraes [UNESP] Scudeletti, Daniele [UNESP] Cruz, Igor Vilela [UNESP] Rosolem, Ciro Antonio [UNESP] |
dc.subject.por.fl_str_mv |
Urochloa ruziziensis non-exchangeable K exchangeable K rhizospheric soil |
topic |
Urochloa ruziziensis non-exchangeable K exchangeable K rhizospheric soil |
description |
Ruzigrass (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. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-01 2019-10-04T12:32:35Z 2019-10-04T12:32:35Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/18069657rbcs20170370 Revista Brasileira De Ciencia Do Solo. Vicosa: Soc Brasileira De Ciencia Do Solo, v. 42, 12 p., 2018. 0100-0683 http://hdl.handle.net/11449/185081 10.1590/18069657rbcs20170370 S0100-06832018000100531 WOS:000450845900001 S0100-06832018000100531.pdf 5720775873259528 0000-0003-2001-0874 |
url |
http://dx.doi.org/10.1590/18069657rbcs20170370 http://hdl.handle.net/11449/185081 |
identifier_str_mv |
Revista Brasileira De Ciencia Do Solo. Vicosa: Soc Brasileira De Ciencia Do Solo, v. 42, 12 p., 2018. 0100-0683 10.1590/18069657rbcs20170370 S0100-06832018000100531 WOS:000450845900001 S0100-06832018000100531.pdf 5720775873259528 0000-0003-2001-0874 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Revista Brasileira De Ciencia Do Solo |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
12 application/pdf |
dc.publisher.none.fl_str_mv |
Soc Brasileira De Ciencia Do Solo |
publisher.none.fl_str_mv |
Soc Brasileira De Ciencia Do Solo |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
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Repositório Institucional da UNESP |
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Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
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