Soil biological indicators associated to the phosphorus cycle in a Cerrado soil under no-till and conventional tillage systems

Detalhes bibliográficos
Autor(a) principal: Carneiro, Roberto Guimarães
Data de Publicação: 2004
Outros Autores: Mendes, Iêda de Carvalho, Lovato, Paulo Emílio, Carvalho, Arminda Moreira, Vivaldi, Lúcio José
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/6823
Resumo: The objective of this work was to evaluate the effects of no-till, conventional tillage and cover crops on biological indicators associated to the P cycle. The work was carried out on three adjacent areas on a Red-Yellow Oxisol: area I, a two-year experiment comparing the two management systems; area II, a six-year experiment, and area III, a native Cerrado vegetation. The soil was sampled at two depths (0–5 cm and 5–20 cm) in July/1998 and January/1999. The biological indicators evaluated were microbial biomass P, acid phosphatase activity, phosphate-solubilizing and total soil fungi and bacteria. Acid phosphatase activity and number of phosphate-solubilizing microorganisms, at the 0–5 cm depth, were significantly greater in the no-till soil, as compared to the conventional tillage. Differences between the tillage systems, regarding the biological indicators evaluated, were more pronounced in area II in which the no-till system had been established for a longer period. Microbial P decreased in the no-till Raphanus sativus treatment. P-solubilizing fungi increased in the presence of Cajanus cajan and Raphanus sativus, whereas the P-solubilizing bacteria increased in the presence of C. cajan. Highest activities of acid phosphatase were detected in the soil under native vegetation, evidencing the importance of organic P mineralization in this ecosystem.
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spelling Soil biological indicators associated to the phosphorus cycle in a Cerrado soil under no-till and conventional tillage systemsIndicadores biológicos associados ao ciclo do fósforo em solos de Cerrado sob plantio direto e plantio convencionalmicrobial biomass P; acid phosphatase; phosphate solubilizing microorganisms; cover cropsP da biomassa microbiana; fosfatase ácida; microrganismos solubilizadores de fosfato; culturas de coberturaThe objective of this work was to evaluate the effects of no-till, conventional tillage and cover crops on biological indicators associated to the P cycle. The work was carried out on three adjacent areas on a Red-Yellow Oxisol: area I, a two-year experiment comparing the two management systems; area II, a six-year experiment, and area III, a native Cerrado vegetation. The soil was sampled at two depths (0–5 cm and 5–20 cm) in July/1998 and January/1999. The biological indicators evaluated were microbial biomass P, acid phosphatase activity, phosphate-solubilizing and total soil fungi and bacteria. Acid phosphatase activity and number of phosphate-solubilizing microorganisms, at the 0–5 cm depth, were significantly greater in the no-till soil, as compared to the conventional tillage. Differences between the tillage systems, regarding the biological indicators evaluated, were more pronounced in area II in which the no-till system had been established for a longer period. Microbial P decreased in the no-till Raphanus sativus treatment. P-solubilizing fungi increased in the presence of Cajanus cajan and Raphanus sativus, whereas the P-solubilizing bacteria increased in the presence of C. cajan. Highest activities of acid phosphatase were detected in the soil under native vegetation, evidencing the importance of organic P mineralization in this ecosystem.O objetivo deste trabalho foi avaliar a influência do plantio direto, do preparo convencional do solo e de plantas de cobertura sobre indicadores biológicos associados ao ciclo do fósforo (P). O trabalho foi realizado em três áreas adjacentes, num Latossolo Vermelho-Amarelo, distribuídas da seguinte maneira: área I, dois anos de experimentação, comparando esses sistemas de plantio; área II, seis anos de experimentação e área III, Cerrado nativo. Em julho/1998 e janeiro/1999, avaliaram-se: o P da biomassa, populações de fungos e bactérias totais e solubilizadores de fosfato e a atividade da fosfatase ácida, nas profundidades de 0–5 e de 5–20 cm. A atividade da fosfatase e a ocorrência de fungos e bactérias solubilizadoras nas áreas com plantio direto foram significativamente superiores às das áreas com plantio convencional, na profundidade de 0–5 cm. O tempo de implantação acentuou as diferenças entre plantio direto e convencional quanto aos indicadores avaliados. O P da biomassa diminuiu no tratamento plantio direto com nabo forrageiro (Raphanus sativus) da área II. Os fungos solubilizadores aumentaram na presença de guandu (Cajanus cajan) e nabo forrageiro, e as bactérias solubilizadoras aumentaram na presença de guandu. O solo sob vegetação nativa apresentou maior atividade da fosfatase em relação ao das áreas cultivadas, evidenciando a importância da mineralização do P orgânico nesse ecossistema.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraCarneiro, Roberto GuimarãesMendes, Iêda de CarvalhoLovato, Paulo EmílioCarvalho, Arminda MoreiraVivaldi, Lúcio José2004-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/6823Pesquisa Agropecuaria Brasileira; v.39, n.7, jul. 2004; 661-669Pesquisa Agropecuária Brasileira; v.39, n.7, jul. 2004; 661-6691678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/6823/3879info:eu-repo/semantics/openAccess2014-07-23T19:58:23Zoai:ojs.seer.sct.embrapa.br:article/6823Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-07-23T19:58:23Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Soil biological indicators associated to the phosphorus cycle in a Cerrado soil under no-till and conventional tillage systems
Indicadores biológicos associados ao ciclo do fósforo em solos de Cerrado sob plantio direto e plantio convencional
title Soil biological indicators associated to the phosphorus cycle in a Cerrado soil under no-till and conventional tillage systems
spellingShingle Soil biological indicators associated to the phosphorus cycle in a Cerrado soil under no-till and conventional tillage systems
Carneiro, Roberto Guimarães
microbial biomass P; acid phosphatase; phosphate solubilizing microorganisms; cover crops
P da biomassa microbiana; fosfatase ácida; microrganismos solubilizadores de fosfato; culturas de cobertura
title_short Soil biological indicators associated to the phosphorus cycle in a Cerrado soil under no-till and conventional tillage systems
title_full Soil biological indicators associated to the phosphorus cycle in a Cerrado soil under no-till and conventional tillage systems
title_fullStr Soil biological indicators associated to the phosphorus cycle in a Cerrado soil under no-till and conventional tillage systems
title_full_unstemmed Soil biological indicators associated to the phosphorus cycle in a Cerrado soil under no-till and conventional tillage systems
title_sort Soil biological indicators associated to the phosphorus cycle in a Cerrado soil under no-till and conventional tillage systems
author Carneiro, Roberto Guimarães
author_facet Carneiro, Roberto Guimarães
Mendes, Iêda de Carvalho
Lovato, Paulo Emílio
Carvalho, Arminda Moreira
Vivaldi, Lúcio José
author_role author
author2 Mendes, Iêda de Carvalho
Lovato, Paulo Emílio
Carvalho, Arminda Moreira
Vivaldi, Lúcio José
author2_role author
author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Carneiro, Roberto Guimarães
Mendes, Iêda de Carvalho
Lovato, Paulo Emílio
Carvalho, Arminda Moreira
Vivaldi, Lúcio José
dc.subject.por.fl_str_mv microbial biomass P; acid phosphatase; phosphate solubilizing microorganisms; cover crops
P da biomassa microbiana; fosfatase ácida; microrganismos solubilizadores de fosfato; culturas de cobertura
topic microbial biomass P; acid phosphatase; phosphate solubilizing microorganisms; cover crops
P da biomassa microbiana; fosfatase ácida; microrganismos solubilizadores de fosfato; culturas de cobertura
description The objective of this work was to evaluate the effects of no-till, conventional tillage and cover crops on biological indicators associated to the P cycle. The work was carried out on three adjacent areas on a Red-Yellow Oxisol: area I, a two-year experiment comparing the two management systems; area II, a six-year experiment, and area III, a native Cerrado vegetation. The soil was sampled at two depths (0–5 cm and 5–20 cm) in July/1998 and January/1999. The biological indicators evaluated were microbial biomass P, acid phosphatase activity, phosphate-solubilizing and total soil fungi and bacteria. Acid phosphatase activity and number of phosphate-solubilizing microorganisms, at the 0–5 cm depth, were significantly greater in the no-till soil, as compared to the conventional tillage. Differences between the tillage systems, regarding the biological indicators evaluated, were more pronounced in area II in which the no-till system had been established for a longer period. Microbial P decreased in the no-till Raphanus sativus treatment. P-solubilizing fungi increased in the presence of Cajanus cajan and Raphanus sativus, whereas the P-solubilizing bacteria increased in the presence of C. cajan. Highest activities of acid phosphatase were detected in the soil under native vegetation, evidencing the importance of organic P mineralization in this ecosystem.
publishDate 2004
dc.date.none.fl_str_mv 2004-07-01
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/6823
url https://seer.sct.embrapa.br/index.php/pab/article/view/6823
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/6823/3879
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.39, n.7, jul. 2004; 661-669
Pesquisa Agropecuária Brasileira; v.39, n.7, jul. 2004; 661-669
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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