Efeito de parâmetros analíticos sobre a precisão de métodos de extração de zinco do solo

Detalhes bibliográficos
Autor(a) principal: Pessôa Da Cruz, Mara Cristina [UNESP]
Data de Publicação: 1997
Outros Autores: Fessel Graner, Celso Augusto [UNESP], Ferreira, Manoel Evaristo [UNESP]
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://seer.sct.embrapa.br/index.php/pab/article/view/4609
http://hdl.handle.net/11449/65006
Resumo: Fifteen soil samples and four extradants (DTPA, Na 2EDTA, HCl and Mehlich 1) were used to study soil extraction methods for available zinc. Each extradant was studied in three soil:solution ratios (1:2, 1:4 and 1:10) and in three extraction periods in the ratio most frequently used. The zinc extracted by DTPA, Na 2EDTA and HCl was not affected by use of soil:solution ratios 1:2 and 1:4, but the amount extracted increased with the 1:10 ratio. In this relation, the variation coefficients increased. With Mehlich, no definite tendency was observed. The increase of extraction period for DTPA extractant, in 1:2 ratio, had little effect on the amount of zinc extracted and on the precision. As to Na 2EDTA extractant in 1:10 ratio, with the increase of extraction time, both increased. As to HCl and Mehlich, both in 1:4 ratio, the increase in extraction period had no effect on the amount of zinc extracted and no definite effect on the precision. Thus, the use of 1:2 ratio for DTPA and Na 2EDTA and 1:4 ratio for acid extractants is recommended. Concerning the period of extraction, 120 min should be used with DTPA and Na 2EDTA, 15 min with HCl and 5 min with Mehlich.
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spelling Efeito de parâmetros analíticos sobre a precisão de métodos de extração de zinco do soloEffect of analytical parameters on the precision of soil zinc extraction methodsDTPAHClMehlich 1MicronutrientNa 2EDTASoil fertility evaluationSoil testFifteen soil samples and four extradants (DTPA, Na 2EDTA, HCl and Mehlich 1) were used to study soil extraction methods for available zinc. Each extradant was studied in three soil:solution ratios (1:2, 1:4 and 1:10) and in three extraction periods in the ratio most frequently used. The zinc extracted by DTPA, Na 2EDTA and HCl was not affected by use of soil:solution ratios 1:2 and 1:4, but the amount extracted increased with the 1:10 ratio. In this relation, the variation coefficients increased. With Mehlich, no definite tendency was observed. The increase of extraction period for DTPA extractant, in 1:2 ratio, had little effect on the amount of zinc extracted and on the precision. As to Na 2EDTA extractant in 1:10 ratio, with the increase of extraction time, both increased. As to HCl and Mehlich, both in 1:4 ratio, the increase in extraction period had no effect on the amount of zinc extracted and no definite effect on the precision. Thus, the use of 1:2 ratio for DTPA and Na 2EDTA and 1:4 ratio for acid extractants is recommended. Concerning the period of extraction, 120 min should be used with DTPA and Na 2EDTA, 15 min with HCl and 5 min with Mehlich.Amostras de quinze solos representativos do Estado de São Paulo e quatro extratores (DTPA, Na2EDTA, HCl, e Mehlich 1) foram usados em estudo de métodos de extração de zinco do solo. Cada extrator foi estudado nas relações solo: solução extratora de 1:2, 1:4 e 1:10 e em três tempos de agitação na relação mais comumente adotada em cada caso. Com os extratores DTPA, Na2EDTA e HCl, a quantidade extraída de zinco se manteve praticamente inalterada nas relações solo: solução de 1:2 e 1:4, e aumentou na relação 1:10, a qual resultou em coeficientes de variação maiores. Com o Mehlich, não houve tendência definida. O aumento do tempo de agitação com o DTPA, na relação 1:2, praticamente não afetou a quantidade extraída, nem a precisão. Com o Na2EDTA, na relação 1:10, ambas aumentaram. Com o HCl e o Mehlich, ambos na relação 1:4, o aumento do tempo de agitação não afetou a quantidade extraída, e não teve efeito definido sobre a precisão. Assim, recomenda-se o emprego da relação 1:2 com os extratores complexantes, e 1:4, com os ácidos. Quanto aos tempos de agitação, recomenda-se 120 min com os complexantes, 15 min com o HCl e 5 min com o Mehlich.Dep. de Solos e Adubos Fac. Cie. Agrarias e Veterinarias UNESP, Rodovia Carlos Tonanni, km 5, CEP 14870-000 Jaboticabal, SPDep. de Química Inst. Biociências UNESP, CEP 18618-000 Botucatu, SPDep. de Solos e Adubos Fac. Cie. Agrarias e Veterinarias UNESPDep. de Solos e Adubos Fac. Cie. Agrarias e Veterinarias UNESP, Rodovia Carlos Tonanni, km 5, CEP 14870-000 Jaboticabal, SPDep. de Química Inst. Biociências UNESP, CEP 18618-000 Botucatu, SPDep. de Solos e Adubos Fac. Cie. Agrarias e Veterinarias UNESPUniversidade Estadual Paulista (Unesp)Pessôa Da Cruz, Mara Cristina [UNESP]Fessel Graner, Celso Augusto [UNESP]Ferreira, Manoel Evaristo [UNESP]2014-05-27T11:18:11Z2014-05-27T11:18:11Z1997-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article85-94application/pdfhttp://seer.sct.embrapa.br/index.php/pab/article/view/4609Pesquisa Agropecuaria Brasileira, v. 32, n. 1, p. 85-94, 1997.0100-204Xhttp://hdl.handle.net/11449/65006WOS:A1997WE306000112-s2.0-33430243332-s2.0-3343024333.pdf4081115649373842Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporPesquisa Agropecuária Brasileira0.546info:eu-repo/semantics/openAccess2024-06-07T14:24:22Zoai:repositorio.unesp.br:11449/65006Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-06T00:02:32.490960Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Efeito de parâmetros analíticos sobre a precisão de métodos de extração de zinco do solo
Effect of analytical parameters on the precision of soil zinc extraction methods
title Efeito de parâmetros analíticos sobre a precisão de métodos de extração de zinco do solo
spellingShingle Efeito de parâmetros analíticos sobre a precisão de métodos de extração de zinco do solo
Pessôa Da Cruz, Mara Cristina [UNESP]
DTPA
HCl
Mehlich 1
Micronutrient
Na 2EDTA
Soil fertility evaluation
Soil test
title_short Efeito de parâmetros analíticos sobre a precisão de métodos de extração de zinco do solo
title_full Efeito de parâmetros analíticos sobre a precisão de métodos de extração de zinco do solo
title_fullStr Efeito de parâmetros analíticos sobre a precisão de métodos de extração de zinco do solo
title_full_unstemmed Efeito de parâmetros analíticos sobre a precisão de métodos de extração de zinco do solo
title_sort Efeito de parâmetros analíticos sobre a precisão de métodos de extração de zinco do solo
author Pessôa Da Cruz, Mara Cristina [UNESP]
author_facet Pessôa Da Cruz, Mara Cristina [UNESP]
Fessel Graner, Celso Augusto [UNESP]
Ferreira, Manoel Evaristo [UNESP]
author_role author
author2 Fessel Graner, Celso Augusto [UNESP]
Ferreira, Manoel Evaristo [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Pessôa Da Cruz, Mara Cristina [UNESP]
Fessel Graner, Celso Augusto [UNESP]
Ferreira, Manoel Evaristo [UNESP]
dc.subject.por.fl_str_mv DTPA
HCl
Mehlich 1
Micronutrient
Na 2EDTA
Soil fertility evaluation
Soil test
topic DTPA
HCl
Mehlich 1
Micronutrient
Na 2EDTA
Soil fertility evaluation
Soil test
description Fifteen soil samples and four extradants (DTPA, Na 2EDTA, HCl and Mehlich 1) were used to study soil extraction methods for available zinc. Each extradant was studied in three soil:solution ratios (1:2, 1:4 and 1:10) and in three extraction periods in the ratio most frequently used. The zinc extracted by DTPA, Na 2EDTA and HCl was not affected by use of soil:solution ratios 1:2 and 1:4, but the amount extracted increased with the 1:10 ratio. In this relation, the variation coefficients increased. With Mehlich, no definite tendency was observed. The increase of extraction period for DTPA extractant, in 1:2 ratio, had little effect on the amount of zinc extracted and on the precision. As to Na 2EDTA extractant in 1:10 ratio, with the increase of extraction time, both increased. As to HCl and Mehlich, both in 1:4 ratio, the increase in extraction period had no effect on the amount of zinc extracted and no definite effect on the precision. Thus, the use of 1:2 ratio for DTPA and Na 2EDTA and 1:4 ratio for acid extractants is recommended. Concerning the period of extraction, 120 min should be used with DTPA and Na 2EDTA, 15 min with HCl and 5 min with Mehlich.
publishDate 1997
dc.date.none.fl_str_mv 1997-01-01
2014-05-27T11:18:11Z
2014-05-27T11:18:11Z
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://seer.sct.embrapa.br/index.php/pab/article/view/4609
Pesquisa Agropecuaria Brasileira, v. 32, n. 1, p. 85-94, 1997.
0100-204X
http://hdl.handle.net/11449/65006
WOS:A1997WE30600011
2-s2.0-3343024333
2-s2.0-3343024333.pdf
4081115649373842
url http://seer.sct.embrapa.br/index.php/pab/article/view/4609
http://hdl.handle.net/11449/65006
identifier_str_mv Pesquisa Agropecuaria Brasileira, v. 32, n. 1, p. 85-94, 1997.
0100-204X
WOS:A1997WE30600011
2-s2.0-3343024333
2-s2.0-3343024333.pdf
4081115649373842
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv Pesquisa Agropecuária Brasileira
0.546
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 85-94
application/pdf
dc.source.none.fl_str_mv Scopus
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
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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