Leaching of Ca, K and Mg in a Dark-Red Latosol (LE) of "Cerrados" I. Magnitude and variability of the phenomenon under rainfall
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/15631 |
Resumo: | The leaching of Ca, K and Mg under rainfall in a LE soil Typic Haplustox)was evaluated by using porous cups at three depths: 30,75 and 105 cm during the growing cycle of corn (Zea mays L. cv. Cargill 111 -X) in 20 x 12 in plots that received low fertility treatments: corrective (AC) and maintenance (AM). Drainage and nutrient flux were shown to be rapid and dynamic suggesting that water movement took place mainly through the soil macrospores. Ca concentrations in soil solution were lower than the critical level of 1.0 mEq/lt and independent of the fertility treatments. Calcium losses due to leaching beyond 105 cm depth were estimated at 129 and 47 kg/ha in plots AC and AM, equivalent to 6.1 and 2.5% of the total Ca initially added, respectively. Potassium concentrations in the soil solution ranged from 0.05 to 0.25 mEq/lt, and leaching losses at the 105 cm depth reached 67.5 and 14,7 kg/ha K for AC and AM plots, which represents 48.21 and 36.75% of the initially applied K, respectively, A close relationships was found between drainage flux at the 105 cm depth and amount of leached K. As the drainage flux increased in magnitude, K concentration decreased. Magnesium concentrations in the soil solution ranged from 0.08 to 0.5 mEq/lt and leaching losses were estimated as 96.0 and 19.8 kg/ha for plots AC and AM, respectively. In the AM plot (considered normal), losses represented 72% of the Mg added in the liming materials. The accumulated leaching curves for the different nutrients showed a close relationship to the accumulated rainfall curves. |
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Leaching of Ca, K and Mg in a Dark-Red Latosol (LE) of "Cerrados" I. Magnitude and variability of the phenomenon under rainfallLixiviação de Ca, K e Mg em um Latossolo Vermelho-Escuro (LE) de Cerrados. I. Magnitude e variabilidade do fenômeno na época chuvosadrainage; corn; porous cupsdrenagem; milho; cápsulas porosasThe leaching of Ca, K and Mg under rainfall in a LE soil Typic Haplustox)was evaluated by using porous cups at three depths: 30,75 and 105 cm during the growing cycle of corn (Zea mays L. cv. Cargill 111 -X) in 20 x 12 in plots that received low fertility treatments: corrective (AC) and maintenance (AM). Drainage and nutrient flux were shown to be rapid and dynamic suggesting that water movement took place mainly through the soil macrospores. Ca concentrations in soil solution were lower than the critical level of 1.0 mEq/lt and independent of the fertility treatments. Calcium losses due to leaching beyond 105 cm depth were estimated at 129 and 47 kg/ha in plots AC and AM, equivalent to 6.1 and 2.5% of the total Ca initially added, respectively. Potassium concentrations in the soil solution ranged from 0.05 to 0.25 mEq/lt, and leaching losses at the 105 cm depth reached 67.5 and 14,7 kg/ha K for AC and AM plots, which represents 48.21 and 36.75% of the initially applied K, respectively, A close relationships was found between drainage flux at the 105 cm depth and amount of leached K. As the drainage flux increased in magnitude, K concentration decreased. Magnesium concentrations in the soil solution ranged from 0.08 to 0.5 mEq/lt and leaching losses were estimated as 96.0 and 19.8 kg/ha for plots AC and AM, respectively. In the AM plot (considered normal), losses represented 72% of the Mg added in the liming materials. The accumulated leaching curves for the different nutrients showed a close relationship to the accumulated rainfall curves.A lixiviação de Ca, K e Mg na época chuvosa foi avaliada num solo LE (EMBRAPA/CPAC), pelo uso de cápsulas porosas, durante o cicio de desenvolvimento do milho (cv. Cargill 111-X) (primeiro ano), em parcelas que receberam dois tratamentos de adubação: corretiva (AC), e de manutenção (AM). Os fluxos de drenagem e de nutrientes, dinâmicos, sugerem que a água movimentou-se principalmente através dos macroporos do solo. As concentrações de Ca na solução de solo foram menores que o nível critico de 1,0 mEq/lt e independentes do nível de adubação. As perdas de Ca além dos 105 cm de profundidade atingiram 129 e 47 kg/ha nas parcelas AC e AM, equivalentes a 6,1 e 2,5% do Ca total inicialmente adicionado, respectivamente. As concentrações de K na solução do solo oscilaram entre 0,05 e 0,25 mEq/lt, e as perdas por lixiviação a 105 cm atingiram 67,5 e 14,7 kg/ha de K para as parcelas AC e AM, o que representa 48,21 e 36,75% do K inicialmente aplicado, respectivamente. Foi encontrada uma estreita relação entre o fluxo de drenagem a 105 cm e a quantidade de K lixiviado, As concentrações de Mg na solução de solo oscilaram entre 0,08 e 0,5mEq/lt e as perdas por lixiviação foram avaliadas em 96,0 e 19,8 kg/ha para as parcelas AC e AM, respectivamente. Na parcela AM (considerada normal), as perdas atingiram 72% do magnésio contido no calcário. Conclui-se que a máxima lixiviação de nutrientes correspondeu ao período de máxima intensidade de chuva, similar ao descrito na literatura para solos arenosos, embora o latossolo LE apresente mais de 50% de argila.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraEspinoza, WaldoReis, Antonio Eduardo G. dos2014-04-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/15631Pesquisa Agropecuaria Brasileira; v.17, n.2, fev. 1982; 299-317Pesquisa Agropecuária Brasileira; v.17, n.2, fev. 1982; 299-3171678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/15631/9635info:eu-repo/semantics/openAccess2014-04-16T12:24:17Zoai:ojs.seer.sct.embrapa.br:article/15631Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-16T12:24:17Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Leaching of Ca, K and Mg in a Dark-Red Latosol (LE) of "Cerrados" I. Magnitude and variability of the phenomenon under rainfall Lixiviação de Ca, K e Mg em um Latossolo Vermelho-Escuro (LE) de Cerrados. I. Magnitude e variabilidade do fenômeno na época chuvosa |
title |
Leaching of Ca, K and Mg in a Dark-Red Latosol (LE) of "Cerrados" I. Magnitude and variability of the phenomenon under rainfall |
spellingShingle |
Leaching of Ca, K and Mg in a Dark-Red Latosol (LE) of "Cerrados" I. Magnitude and variability of the phenomenon under rainfall Espinoza, Waldo drainage; corn; porous cups drenagem; milho; cápsulas porosas |
title_short |
Leaching of Ca, K and Mg in a Dark-Red Latosol (LE) of "Cerrados" I. Magnitude and variability of the phenomenon under rainfall |
title_full |
Leaching of Ca, K and Mg in a Dark-Red Latosol (LE) of "Cerrados" I. Magnitude and variability of the phenomenon under rainfall |
title_fullStr |
Leaching of Ca, K and Mg in a Dark-Red Latosol (LE) of "Cerrados" I. Magnitude and variability of the phenomenon under rainfall |
title_full_unstemmed |
Leaching of Ca, K and Mg in a Dark-Red Latosol (LE) of "Cerrados" I. Magnitude and variability of the phenomenon under rainfall |
title_sort |
Leaching of Ca, K and Mg in a Dark-Red Latosol (LE) of "Cerrados" I. Magnitude and variability of the phenomenon under rainfall |
author |
Espinoza, Waldo |
author_facet |
Espinoza, Waldo Reis, Antonio Eduardo G. dos |
author_role |
author |
author2 |
Reis, Antonio Eduardo G. dos |
author2_role |
author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Espinoza, Waldo Reis, Antonio Eduardo G. dos |
dc.subject.por.fl_str_mv |
drainage; corn; porous cups drenagem; milho; cápsulas porosas |
topic |
drainage; corn; porous cups drenagem; milho; cápsulas porosas |
description |
The leaching of Ca, K and Mg under rainfall in a LE soil Typic Haplustox)was evaluated by using porous cups at three depths: 30,75 and 105 cm during the growing cycle of corn (Zea mays L. cv. Cargill 111 -X) in 20 x 12 in plots that received low fertility treatments: corrective (AC) and maintenance (AM). Drainage and nutrient flux were shown to be rapid and dynamic suggesting that water movement took place mainly through the soil macrospores. Ca concentrations in soil solution were lower than the critical level of 1.0 mEq/lt and independent of the fertility treatments. Calcium losses due to leaching beyond 105 cm depth were estimated at 129 and 47 kg/ha in plots AC and AM, equivalent to 6.1 and 2.5% of the total Ca initially added, respectively. Potassium concentrations in the soil solution ranged from 0.05 to 0.25 mEq/lt, and leaching losses at the 105 cm depth reached 67.5 and 14,7 kg/ha K for AC and AM plots, which represents 48.21 and 36.75% of the initially applied K, respectively, A close relationships was found between drainage flux at the 105 cm depth and amount of leached K. As the drainage flux increased in magnitude, K concentration decreased. Magnesium concentrations in the soil solution ranged from 0.08 to 0.5 mEq/lt and leaching losses were estimated as 96.0 and 19.8 kg/ha for plots AC and AM, respectively. In the AM plot (considered normal), losses represented 72% of the Mg added in the liming materials. The accumulated leaching curves for the different nutrients showed a close relationship to the accumulated rainfall curves. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04-16 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/15631 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/15631 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/15631/9635 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.17, n.2, fev. 1982; 299-317 Pesquisa Agropecuária Brasileira; v.17, n.2, fev. 1982; 299-317 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416656913956864 |