Impact of soil tillage and land use on soil organic carbon decline under Mediterranean conditions

Detalhes bibliográficos
Autor(a) principal: Basch, G.
Data de Publicação: 2012
Outros Autores: Calado, J., Barros, J., Carvalho, M.
Tipo de documento: Artigo de conferência
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/7731
Resumo: Soils under Mediterranean climate conditions frequently have low to very low levels of soil organic matter (SOM), as a result of low biomass production under the predominantly rainfed conditions and the intensive tillage operations commonly practiced. In order to assess both short and long-term impacts of soil tillage and land use on soil organic carbon, two sets of experiments were performed. One consisted in the identification and soil analysis of 3 pairs of sites under different soil types and land use over 5 to 30 years; in the second experiment a long-term fallow area was repeatedly submitted to different types of soil tillage management (mouldboard plough + disc harrow; non-inversion tine cultivation; no-till) over 3 years. Soil texture, bulk density and SOM were analysed along the whole soil profile in the first experiment, whereas bulk density and SOM to a depth of 30 cm was measured before the first tillage operations and at the end of the observation period in the second experiment. The results clearly indicate that tillage based land use, irrespective of the type of land use, caused a considerable decline in SOM content in the tilled soil layer. Very small and inconsistent differences in SOM between paired soil profiles were observed in the lower part of the profiles. In the second experiment with three types of tillage systems, SOM content decreased with tillage intensity. Avoidance of soil disturbance is an important step towards halting SOM decline under Mediterranean climate conditions.
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spelling Impact of soil tillage and land use on soil organic carbon decline under Mediterranean conditionssoil organic mattersoil tillageland useMediterraneanSoils under Mediterranean climate conditions frequently have low to very low levels of soil organic matter (SOM), as a result of low biomass production under the predominantly rainfed conditions and the intensive tillage operations commonly practiced. In order to assess both short and long-term impacts of soil tillage and land use on soil organic carbon, two sets of experiments were performed. One consisted in the identification and soil analysis of 3 pairs of sites under different soil types and land use over 5 to 30 years; in the second experiment a long-term fallow area was repeatedly submitted to different types of soil tillage management (mouldboard plough + disc harrow; non-inversion tine cultivation; no-till) over 3 years. Soil texture, bulk density and SOM were analysed along the whole soil profile in the first experiment, whereas bulk density and SOM to a depth of 30 cm was measured before the first tillage operations and at the end of the observation period in the second experiment. The results clearly indicate that tillage based land use, irrespective of the type of land use, caused a considerable decline in SOM content in the tilled soil layer. Very small and inconsistent differences in SOM between paired soil profiles were observed in the lower part of the profiles. In the second experiment with three types of tillage systems, SOM content decreased with tillage intensity. Avoidance of soil disturbance is an important step towards halting SOM decline under Mediterranean climate conditions.ISTRO2013-01-25T12:43:21Z2013-01-252012-09-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjecthttp://hdl.handle.net/10174/7731http://hdl.handle.net/10174/7731engBasch, G.; Calado, J.; Barros, J.; Carvalho, M. 2012. Impact of soil tillage and land use on soil organic carbon decline under Mediterranean conditions. 19th ISTRO Conference, Montevideo, Uruguai, Set. 24–28.MontevideosimnaonaoDeptº de Fitotecniagb@uevora.ptjcalado@uevora.ptjfcb@uevora.ptmjc@uevora.pt577Basch, G.Calado, J.Barros, J.Carvalho, M.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T18:48:15Zoai:dspace.uevora.pt:10174/7731Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:02:13.481317Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Impact of soil tillage and land use on soil organic carbon decline under Mediterranean conditions
title Impact of soil tillage and land use on soil organic carbon decline under Mediterranean conditions
spellingShingle Impact of soil tillage and land use on soil organic carbon decline under Mediterranean conditions
Basch, G.
soil organic matter
soil tillage
land use
Mediterranean
title_short Impact of soil tillage and land use on soil organic carbon decline under Mediterranean conditions
title_full Impact of soil tillage and land use on soil organic carbon decline under Mediterranean conditions
title_fullStr Impact of soil tillage and land use on soil organic carbon decline under Mediterranean conditions
title_full_unstemmed Impact of soil tillage and land use on soil organic carbon decline under Mediterranean conditions
title_sort Impact of soil tillage and land use on soil organic carbon decline under Mediterranean conditions
author Basch, G.
author_facet Basch, G.
Calado, J.
Barros, J.
Carvalho, M.
author_role author
author2 Calado, J.
Barros, J.
Carvalho, M.
author2_role author
author
author
dc.contributor.author.fl_str_mv Basch, G.
Calado, J.
Barros, J.
Carvalho, M.
dc.subject.por.fl_str_mv soil organic matter
soil tillage
land use
Mediterranean
topic soil organic matter
soil tillage
land use
Mediterranean
description Soils under Mediterranean climate conditions frequently have low to very low levels of soil organic matter (SOM), as a result of low biomass production under the predominantly rainfed conditions and the intensive tillage operations commonly practiced. In order to assess both short and long-term impacts of soil tillage and land use on soil organic carbon, two sets of experiments were performed. One consisted in the identification and soil analysis of 3 pairs of sites under different soil types and land use over 5 to 30 years; in the second experiment a long-term fallow area was repeatedly submitted to different types of soil tillage management (mouldboard plough + disc harrow; non-inversion tine cultivation; no-till) over 3 years. Soil texture, bulk density and SOM were analysed along the whole soil profile in the first experiment, whereas bulk density and SOM to a depth of 30 cm was measured before the first tillage operations and at the end of the observation period in the second experiment. The results clearly indicate that tillage based land use, irrespective of the type of land use, caused a considerable decline in SOM content in the tilled soil layer. Very small and inconsistent differences in SOM between paired soil profiles were observed in the lower part of the profiles. In the second experiment with three types of tillage systems, SOM content decreased with tillage intensity. Avoidance of soil disturbance is an important step towards halting SOM decline under Mediterranean climate conditions.
publishDate 2012
dc.date.none.fl_str_mv 2012-09-01T00:00:00Z
2013-01-25T12:43:21Z
2013-01-25
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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format conferenceObject
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10174/7731
http://hdl.handle.net/10174/7731
url http://hdl.handle.net/10174/7731
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Basch, G.; Calado, J.; Barros, J.; Carvalho, M. 2012. Impact of soil tillage and land use on soil organic carbon decline under Mediterranean conditions. 19th ISTRO Conference, Montevideo, Uruguai, Set. 24–28.
Montevideo
sim
nao
nao
Deptº de Fitotecnia
gb@uevora.pt
jcalado@uevora.pt
jfcb@uevora.pt
mjc@uevora.pt
577
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv ISTRO
publisher.none.fl_str_mv ISTRO
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instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
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institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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