Prognóstico da toxidez de ferro em arroz irrigado por alagamento através da análise de solo pelo método oxalato de amônio

Detalhes bibliográficos
Autor(a) principal: Wolter, Roberto Carlos Doring
Data de Publicação: 2010
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Repositório Institucional da UFPel - Guaiaca
Texto Completo: http://repositorio.ufpel.edu.br/handle/ri/1184
Resumo: Iron toxicity can cause considerable reductions in the productivity of rice, depending on the severity of symptoms and the affected area in the field. It is necessary to identify the factors that determine the occurrence of this nutritional disorder, so that effective measures may be carried out to correct this problem in the field. The objective of this study is to verify that the interpretation criteria for prognosis of the risk of iron toxicity in flooded rice using the soil analysis are reliable for a particular group of lowland soils. Thus, an experiment was conducted in the greenhouse, and the treatments made up of eleven lowland soils structured with a one-factor randomized block design, with four replications. The indicators were: iron extracted from the soil and the CEC, to estimate the percentage of saturation of CEC by Fe2+, percentage of symptoms of iron toxicity, weight of dry matter, and calcium, magnesium, iron and manganese contents in the soil solution and plant tissue. The results were subjected to analysis of variance (Duncan test) at 5% probability, and simple linear correlation of Pearson analyzes (whereas levels greater than 95%). The indicators which have the best efficiency to predict the risk of toxicity by iron is the iron concentrationt in the soil solution and PSFe2+. The PSFe2+ has a high correlation coefficient with the concentration of iron in the soil solution. No symptoms of toxicity by iron is observed when the mole ratio of iron by divalent cations in soil solution is less than 0.30. The extraction of iron by ammonium oxalate at pH 6.0 is a good indicator for estimating the iron that is accumulated during the flooding. The interpretation for prediction of the risk of occurrence of iron toxicity in rice proposed by SOSBAI (2007) based on PSFe2+ is efficient for predicting the occurrence of the problem for the group of soils in the study.
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spelling http://lattes.cnpq.br/2686783742107265http://lattes.cnpq.br/0190845387852451Vahl, Ledemar Carloshttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4727811D6Sousa, Rogerio Oliveira deWolter, Roberto Carlos Doring2014-08-20T13:25:43Z2011-05-162014-08-20T13:25:43Z2010-03-05WOLTER, Roberto Carlos Doring. Prognosis of iron toxicity in rice by flooding through the analysis of soil by ammonium oxalate method.. 2010. 83 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Pelotas, Pelotas, 2010.http://repositorio.ufpel.edu.br/handle/ri/1184Iron toxicity can cause considerable reductions in the productivity of rice, depending on the severity of symptoms and the affected area in the field. It is necessary to identify the factors that determine the occurrence of this nutritional disorder, so that effective measures may be carried out to correct this problem in the field. The objective of this study is to verify that the interpretation criteria for prognosis of the risk of iron toxicity in flooded rice using the soil analysis are reliable for a particular group of lowland soils. Thus, an experiment was conducted in the greenhouse, and the treatments made up of eleven lowland soils structured with a one-factor randomized block design, with four replications. The indicators were: iron extracted from the soil and the CEC, to estimate the percentage of saturation of CEC by Fe2+, percentage of symptoms of iron toxicity, weight of dry matter, and calcium, magnesium, iron and manganese contents in the soil solution and plant tissue. The results were subjected to analysis of variance (Duncan test) at 5% probability, and simple linear correlation of Pearson analyzes (whereas levels greater than 95%). The indicators which have the best efficiency to predict the risk of toxicity by iron is the iron concentrationt in the soil solution and PSFe2+. The PSFe2+ has a high correlation coefficient with the concentration of iron in the soil solution. No symptoms of toxicity by iron is observed when the mole ratio of iron by divalent cations in soil solution is less than 0.30. The extraction of iron by ammonium oxalate at pH 6.0 is a good indicator for estimating the iron that is accumulated during the flooding. The interpretation for prediction of the risk of occurrence of iron toxicity in rice proposed by SOSBAI (2007) based on PSFe2+ is efficient for predicting the occurrence of the problem for the group of soils in the study.A toxidez de ferro pode causar reduções consideráveis na produtividade do arroz, dependendo da intensidade dos sintomas e da área afetada na lavoura. É necessário identificar os fatores que determinam a ocorrência dessa desordem nutricional, afim de que possam ser realizadas medidas efetivas para corrigir esse problema na lavoura. O objetivo do presente trabalho é verificar se os critérios de interpretação para prognóstico do risco de ocorrência da toxidez por ferro em arroz irrigado por alagamento a partir da análise de solo são válidos para um determinado grupo de solos de várzea. Para isso, foi conduzido um experimento em casa de vegetação, sendo os tratamentos compostos por onze solos de várzea estruturados num unifatorial com delineamento em blocos casualizados, com quatro repetições. Os indicadores avaliados foram: ferro extraído do solo e a CTC, para a estimação da porcentagem de saturação da CTC por Fe2+, porcentagem de sintomas de toxidez por ferro, peso de massa seca, e as concentrações de cálcio, magnésio, ferro e manganês na solução do solo e na parte aérea das plantas. Os resultados foram submetidos à análise de variância (teste de Ducan) a 5% de probabilidade, e realizadas análises de correlações lineares simples de Pearson (considerando níveis maiores que 95%). Os indicadores que apresentam a melhor eficiência para prever o risco de ocorrência de toxidez por ferro são a concentração de ferro na solução do solo e a PSFe2+. A PSFe2+ apresenta alto coeficiente de correlação com a concentração de ferro na solução do solo. Nenhum sintoma de toxidez por ferro é observado quando a fração molar de ferro pelos cátions divalentes na solução do solo é inferior a 0,30. A extração de ferro por oxalato de amônio a pH 6,0 é um bom indicador para se estimar o ferro que é acumulado durante o alagamento do solo. A interpretação para prognóstico do risco de ocorrência da toxidez por ferro em arroz irrigado proposto por SOSBAI (2007) baseada na PSFe2+ é eficiente para previsão da ocorrência do problema para o grupo de solos do estudo.application/pdfporUniversidade Federal de PelotasPrograma de Pós-Graduação em AgronomiaUFPelBRFaculdade de Agronomia Eliseu MacielFerro oxalatoFerro CDBToxidez por ferroSolução do soloSintomas de toxidez por ferroIron oxalateIron CDBSymptoms of iron toxicitySoil solutionCNPQ::CIENCIAS AGRARIAS::AGRONOMIAPrognóstico da toxidez de ferro em arroz irrigado por alagamento através da análise de solo pelo método oxalato de amônioPrognosis of iron toxicity in rice by flooding through the analysis of soil by ammonium oxalate method.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFPel - Guaiacainstname:Universidade Federal de Pelotas (UFPEL)instacron:UFPELORIGINALDissertacao_Roberto_ Carlos_Doring_ Wolter.pdfapplication/pdf973904http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/1184/1/Dissertacao_Roberto_%20Carlos_Doring_%20Wolter.pdf67cf8c20b65c6a70b13833df022a0d9cMD51open accessTEXTDissertacao_Roberto_ Carlos_Doring_ Wolter.pdf.txtDissertacao_Roberto_ Carlos_Doring_ Wolter.pdf.txtExtracted Texttext/plain148301http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/1184/2/Dissertacao_Roberto_%20Carlos_Doring_%20Wolter.pdf.txtef2a5bf71f783bbb40a05126cc56e77cMD52open accessTHUMBNAILDissertacao_Roberto_ Carlos_Doring_ Wolter.pdf.jpgDissertacao_Roberto_ Carlos_Doring_ Wolter.pdf.jpgGenerated Thumbnailimage/jpeg1387http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/1184/3/Dissertacao_Roberto_%20Carlos_Doring_%20Wolter.pdf.jpga4b5c5bcfba59d740d3d51d984966877MD53open access123456789/11842022-12-22 20:43:21.418open accessoai:guaiaca.ufpel.edu.br:123456789/1184Repositório InstitucionalPUBhttp://repositorio.ufpel.edu.br/oai/requestrippel@ufpel.edu.br || repositorio@ufpel.edu.br || aline.batista@ufpel.edu.bropendoar:2022-12-22T23:43:21Repositório Institucional da UFPel - Guaiaca - Universidade Federal de Pelotas (UFPEL)false
dc.title.por.fl_str_mv Prognóstico da toxidez de ferro em arroz irrigado por alagamento através da análise de solo pelo método oxalato de amônio
dc.title.alternative.eng.fl_str_mv Prognosis of iron toxicity in rice by flooding through the analysis of soil by ammonium oxalate method.
title Prognóstico da toxidez de ferro em arroz irrigado por alagamento através da análise de solo pelo método oxalato de amônio
spellingShingle Prognóstico da toxidez de ferro em arroz irrigado por alagamento através da análise de solo pelo método oxalato de amônio
Wolter, Roberto Carlos Doring
Ferro oxalato
Ferro CDB
Toxidez por ferro
Solução do solo
Sintomas de toxidez por ferro
Iron oxalate
Iron CDB
Symptoms of iron toxicity
Soil solution
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA
title_short Prognóstico da toxidez de ferro em arroz irrigado por alagamento através da análise de solo pelo método oxalato de amônio
title_full Prognóstico da toxidez de ferro em arroz irrigado por alagamento através da análise de solo pelo método oxalato de amônio
title_fullStr Prognóstico da toxidez de ferro em arroz irrigado por alagamento através da análise de solo pelo método oxalato de amônio
title_full_unstemmed Prognóstico da toxidez de ferro em arroz irrigado por alagamento através da análise de solo pelo método oxalato de amônio
title_sort Prognóstico da toxidez de ferro em arroz irrigado por alagamento através da análise de solo pelo método oxalato de amônio
author Wolter, Roberto Carlos Doring
author_facet Wolter, Roberto Carlos Doring
author_role author
dc.contributor.authorLattes.por.fl_str_mv http://lattes.cnpq.br/2686783742107265
dc.contributor.advisorLattes.por.fl_str_mv http://lattes.cnpq.br/0190845387852451
dc.contributor.advisor-co1.fl_str_mv Vahl, Ledemar Carlos
dc.contributor.advisor-co1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4727811D6
dc.contributor.advisor1.fl_str_mv Sousa, Rogerio Oliveira de
dc.contributor.author.fl_str_mv Wolter, Roberto Carlos Doring
contributor_str_mv Vahl, Ledemar Carlos
Sousa, Rogerio Oliveira de
dc.subject.por.fl_str_mv Ferro oxalato
Ferro CDB
Toxidez por ferro
Solução do solo
Sintomas de toxidez por ferro
topic Ferro oxalato
Ferro CDB
Toxidez por ferro
Solução do solo
Sintomas de toxidez por ferro
Iron oxalate
Iron CDB
Symptoms of iron toxicity
Soil solution
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA
dc.subject.eng.fl_str_mv Iron oxalate
Iron CDB
Symptoms of iron toxicity
Soil solution
dc.subject.cnpq.fl_str_mv CNPQ::CIENCIAS AGRARIAS::AGRONOMIA
description Iron toxicity can cause considerable reductions in the productivity of rice, depending on the severity of symptoms and the affected area in the field. It is necessary to identify the factors that determine the occurrence of this nutritional disorder, so that effective measures may be carried out to correct this problem in the field. The objective of this study is to verify that the interpretation criteria for prognosis of the risk of iron toxicity in flooded rice using the soil analysis are reliable for a particular group of lowland soils. Thus, an experiment was conducted in the greenhouse, and the treatments made up of eleven lowland soils structured with a one-factor randomized block design, with four replications. The indicators were: iron extracted from the soil and the CEC, to estimate the percentage of saturation of CEC by Fe2+, percentage of symptoms of iron toxicity, weight of dry matter, and calcium, magnesium, iron and manganese contents in the soil solution and plant tissue. The results were subjected to analysis of variance (Duncan test) at 5% probability, and simple linear correlation of Pearson analyzes (whereas levels greater than 95%). The indicators which have the best efficiency to predict the risk of toxicity by iron is the iron concentrationt in the soil solution and PSFe2+. The PSFe2+ has a high correlation coefficient with the concentration of iron in the soil solution. No symptoms of toxicity by iron is observed when the mole ratio of iron by divalent cations in soil solution is less than 0.30. The extraction of iron by ammonium oxalate at pH 6.0 is a good indicator for estimating the iron that is accumulated during the flooding. The interpretation for prediction of the risk of occurrence of iron toxicity in rice proposed by SOSBAI (2007) based on PSFe2+ is efficient for predicting the occurrence of the problem for the group of soils in the study.
publishDate 2010
dc.date.issued.fl_str_mv 2010-03-05
dc.date.available.fl_str_mv 2011-05-16
2014-08-20T13:25:43Z
dc.date.accessioned.fl_str_mv 2014-08-20T13:25:43Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
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dc.identifier.citation.fl_str_mv WOLTER, Roberto Carlos Doring. Prognosis of iron toxicity in rice by flooding through the analysis of soil by ammonium oxalate method.. 2010. 83 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Pelotas, Pelotas, 2010.
dc.identifier.uri.fl_str_mv http://repositorio.ufpel.edu.br/handle/ri/1184
identifier_str_mv WOLTER, Roberto Carlos Doring. Prognosis of iron toxicity in rice by flooding through the analysis of soil by ammonium oxalate method.. 2010. 83 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Pelotas, Pelotas, 2010.
url http://repositorio.ufpel.edu.br/handle/ri/1184
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dc.publisher.country.fl_str_mv BR
dc.publisher.department.fl_str_mv Faculdade de Agronomia Eliseu Maciel
publisher.none.fl_str_mv Universidade Federal de Pelotas
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