Mineralogia e liberação de potássio em solos de várzea do Rio Grande do Sul
Ano de defesa: | 2010 |
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Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | , |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal de Santa Maria
|
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Ciência do Solo
|
Departamento: |
Agronomia
|
País: |
BR
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://repositorio.ufsm.br/handle/1/5510 |
Resumo: | The cultivation of flooded rice in Rio Grande do Sul (RS) does not always respond to potassium (K) fertilization, even when the availability is considered low or medium. Other K forms not estimated by the method of analysis (Mehlich-1) are contributing to the supply to plants. The aim of this work was to study the mineralogy and the potential release K in paddy soils from RS. The experiment was carried out in laboratory, using samples from 15 lowland soils of 13 municipalities of RS, produce with flooded rice. The K extraction was done using the following methods: ammonium acetate, sodium tetraphenyl borate (NaTFB) and hydrofluoric acid (HF). In some samples, selected by the content of total K, the minerals present in these soils were identified by X-ray diffraction (XRD) analysis. To assess the potential release of nonexchangeable K NaTFB was used with times of reaction from 1 up to 96 hours (contact soil / extraction solution). On this way, the XRD was used to verify the possible changes in the mineralogy after NaTFB contact with the soil. There was a wide variation in K among the soils and in the levels of nonexchangeable K extracted in different times of reaction, that probably reflect on the K availability to plants. Soils with low or medium levels of K total showed similar caly minerals and the soils with high K total level contained illite reflects. Besides, only the Santa Maria and Caçapava do Sul soils, which had high nonexchengeable K, the mineralogy of the illite present in the clay fraction was affected by NaTFB extractor with 24 hours of contact. |
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2017-03-212017-03-212010-04-09BRITZKE, Darines. Mineralogy and potassium release in lowland soils from Rio Grande do Sul state, Brazil. 2010. 76 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2010.http://repositorio.ufsm.br/handle/1/5510The cultivation of flooded rice in Rio Grande do Sul (RS) does not always respond to potassium (K) fertilization, even when the availability is considered low or medium. Other K forms not estimated by the method of analysis (Mehlich-1) are contributing to the supply to plants. The aim of this work was to study the mineralogy and the potential release K in paddy soils from RS. The experiment was carried out in laboratory, using samples from 15 lowland soils of 13 municipalities of RS, produce with flooded rice. The K extraction was done using the following methods: ammonium acetate, sodium tetraphenyl borate (NaTFB) and hydrofluoric acid (HF). In some samples, selected by the content of total K, the minerals present in these soils were identified by X-ray diffraction (XRD) analysis. To assess the potential release of nonexchangeable K NaTFB was used with times of reaction from 1 up to 96 hours (contact soil / extraction solution). On this way, the XRD was used to verify the possible changes in the mineralogy after NaTFB contact with the soil. There was a wide variation in K among the soils and in the levels of nonexchangeable K extracted in different times of reaction, that probably reflect on the K availability to plants. Soils with low or medium levels of K total showed similar caly minerals and the soils with high K total level contained illite reflects. Besides, only the Santa Maria and Caçapava do Sul soils, which had high nonexchengeable K, the mineralogy of the illite present in the clay fraction was affected by NaTFB extractor with 24 hours of contact.A cultura do arroz irrigado por alagamento no Rio Grande do Sul (RS) nem sempre responde à aplicação de potássio (K), mesmo quando o solo se encontra com teor disponível considerado baixo ou médio. Outras formas de K não estimadas pelo método de análise (Mehlich-1) podem estar contribuindo para o suprimento às plantas. O objetivo desse trabalho foi estudar a mineralogia e o potencial de liberação de K em solos de várzea do RS. O experimento foi desenvolvido em laboratório, sendo utilizadas amostras de 15 solos de várzea de 13 municípios do RS produtores de arroz irrigado por alagamento. Nos solos foi realizada a extração de K pelos métodos: acetato de amônio, tetrafenil borato de sódio - NaTFB e ácido fluorídrico HF. Em algumas amostras, selecionadas pelo teor de K extraído por HF (K total), os minerais presentes nesses solos foram identificados por meio de análise de difração de raios-X (DRX). Para avaliação do potencial de liberação de K não trocável foi usado o NaTFB com intervalos de tempo de 1 até 96 horas de contato solo/solução extratora. Da mesma forma, foi usado a DRX para verificar possível alteração da mineralogia após o contato do NaTFB com o solo. Houve grande variação dos teores de K total entre os solos de várzea do RS, assim como nos teores de K não trocável extraídos nos diferentes intervalos de tempo, com provável reflexo na disponibilidade às plantas. Os solos que continham teores baixos ou médios de K total apresentaram argilominerais semelhantes e sem K na estrutura, enquanto os que continham altos teores de K total apresentaram reflexos de ilita. Nos solos de Santa Maria e Caçapava do Sul, os quais continham alto K não trocável, a mineralogia da fração argila foi afetada pelo extrator NaTFB com 24 horas de contato.Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorapplication/pdfporUniversidade Federal de Santa MariaPrograma de Pós-Graduação em Ciência do SoloUFSMBRAgronomiaPotássio não trocávelDisponibilidade de potássioArroz irrigadoNonexchengeable potassium availabilityFlooded riceCNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLOMineralogia e liberação de potássio em solos de várzea do Rio Grande do SulMineralogy and potassium release in lowland soils from Rio Grande do Sul state, Brazilinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisSilva, Leandro Souza dahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4706291Y9Kaminski, Joãohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783777Y9Bortoluzzi, Edson Campanholahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4707576E6http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4164151U1Britzke, Darines500100100005400500300500500c2f00174-0754-4d4d-9615-065ab03f5e53a4960692-80db-430c-a034-378d39f434da9a01802c-69d5-4fc7-b420-fc64956e01a7a3ce17ed-9d60-44a3-9b42-3ba1bbea2445info:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALBRITZKE, DARINES.pdfapplication/pdf1036746http://repositorio.ufsm.br/bitstream/1/5510/1/BRITZKE%2c%20DARINES.pdfe0174e94eaec2779b8f7a232ecdf91b9MD51TEXTBRITZKE, DARINES.pdf.txtBRITZKE, DARINES.pdf.txtExtracted texttext/plain122193http://repositorio.ufsm.br/bitstream/1/5510/2/BRITZKE%2c%20DARINES.pdf.txtfc3d3af64373a7c8f84d43a5923f3537MD52THUMBNAILBRITZKE, DARINES.pdf.jpgBRITZKE, DARINES.pdf.jpgIM Thumbnailimage/jpeg4787http://repositorio.ufsm.br/bitstream/1/5510/3/BRITZKE%2c%20DARINES.pdf.jpg4dd0ff8565b0abae5335948b9eff9d9dMD531/55102017-07-25 11:17:25.017oai:repositorio.ufsm.br:1/5510Repositório Institucionalhttp://repositorio.ufsm.br/PUBhttp://repositorio.ufsm.br/oai/requestopendoar:39132017-07-25T14:17:25Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.por.fl_str_mv |
Mineralogia e liberação de potássio em solos de várzea do Rio Grande do Sul |
dc.title.alternative.eng.fl_str_mv |
Mineralogy and potassium release in lowland soils from Rio Grande do Sul state, Brazil |
title |
Mineralogia e liberação de potássio em solos de várzea do Rio Grande do Sul |
spellingShingle |
Mineralogia e liberação de potássio em solos de várzea do Rio Grande do Sul Britzke, Darines Potássio não trocável Disponibilidade de potássio Arroz irrigado Nonexchengeable potassium availability Flooded rice CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLO |
title_short |
Mineralogia e liberação de potássio em solos de várzea do Rio Grande do Sul |
title_full |
Mineralogia e liberação de potássio em solos de várzea do Rio Grande do Sul |
title_fullStr |
Mineralogia e liberação de potássio em solos de várzea do Rio Grande do Sul |
title_full_unstemmed |
Mineralogia e liberação de potássio em solos de várzea do Rio Grande do Sul |
title_sort |
Mineralogia e liberação de potássio em solos de várzea do Rio Grande do Sul |
author |
Britzke, Darines |
author_facet |
Britzke, Darines |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Silva, Leandro Souza da |
dc.contributor.advisor1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4706291Y9 |
dc.contributor.referee1.fl_str_mv |
Kaminski, João |
dc.contributor.referee1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783777Y9 |
dc.contributor.referee2.fl_str_mv |
Bortoluzzi, Edson Campanhola |
dc.contributor.referee2Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4707576E6 |
dc.contributor.authorLattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4164151U1 |
dc.contributor.author.fl_str_mv |
Britzke, Darines |
contributor_str_mv |
Silva, Leandro Souza da Kaminski, João Bortoluzzi, Edson Campanhola |
dc.subject.por.fl_str_mv |
Potássio não trocável Disponibilidade de potássio Arroz irrigado |
topic |
Potássio não trocável Disponibilidade de potássio Arroz irrigado Nonexchengeable potassium availability Flooded rice CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLO |
dc.subject.eng.fl_str_mv |
Nonexchengeable potassium availability Flooded rice |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLO |
description |
The cultivation of flooded rice in Rio Grande do Sul (RS) does not always respond to potassium (K) fertilization, even when the availability is considered low or medium. Other K forms not estimated by the method of analysis (Mehlich-1) are contributing to the supply to plants. The aim of this work was to study the mineralogy and the potential release K in paddy soils from RS. The experiment was carried out in laboratory, using samples from 15 lowland soils of 13 municipalities of RS, produce with flooded rice. The K extraction was done using the following methods: ammonium acetate, sodium tetraphenyl borate (NaTFB) and hydrofluoric acid (HF). In some samples, selected by the content of total K, the minerals present in these soils were identified by X-ray diffraction (XRD) analysis. To assess the potential release of nonexchangeable K NaTFB was used with times of reaction from 1 up to 96 hours (contact soil / extraction solution). On this way, the XRD was used to verify the possible changes in the mineralogy after NaTFB contact with the soil. There was a wide variation in K among the soils and in the levels of nonexchangeable K extracted in different times of reaction, that probably reflect on the K availability to plants. Soils with low or medium levels of K total showed similar caly minerals and the soils with high K total level contained illite reflects. Besides, only the Santa Maria and Caçapava do Sul soils, which had high nonexchengeable K, the mineralogy of the illite present in the clay fraction was affected by NaTFB extractor with 24 hours of contact. |
publishDate |
2010 |
dc.date.issued.fl_str_mv |
2010-04-09 |
dc.date.accessioned.fl_str_mv |
2017-03-21 |
dc.date.available.fl_str_mv |
2017-03-21 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
BRITZKE, Darines. Mineralogy and potassium release in lowland soils from Rio Grande do Sul state, Brazil. 2010. 76 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2010. |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/5510 |
identifier_str_mv |
BRITZKE, Darines. Mineralogy and potassium release in lowland soils from Rio Grande do Sul state, Brazil. 2010. 76 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2010. |
url |
http://repositorio.ufsm.br/handle/1/5510 |
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por |
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500100100005 |
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400 500 300 500 500 |
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openAccess |
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Universidade Federal de Santa Maria |
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UFSM |
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BR |
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Agronomia |
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