Dynamics of soil nitrogen and water in a selective thinning in the argentinian dry chaco

Detalhes bibliográficos
Autor(a) principal: Oliva, Luisa
Data de Publicação: 1993
Outros Autores: Mazzarino, Maria J., Nuñez, Gabriela, Abril, Adriana, Acosta, Marta
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/3929
Resumo: Clearcutting for livestock production in the Dry Chaco is leading to shrub invasion and desertification. This trend could be avoided through a more rational management of the arboreous resources. The effects of a selective thinning (40% tree canopy cover) on soil nitrogen and moisture dynamics were studied during one year. Accumulated N mineralization was 40% higher in the selective thinning than in the natural woodland (85% arbustive + tree canopy cover). Different patterns were observed under the dominant tree species. In the selective thinning, available N, N immobilized in microbial biomass and soil water content were significantly higher under Aspidosperma quebracho-blanco Schlecht., Apocinaceae. In the natural woodland, N availability and nitrifier densities were higher under Prosopis flexuosa DC, Fabaceae. The open interspaces between trees exhibited the lowest values of all measured parameters. Possible explanations of observed differences and implications for pasture production are discussed.
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spelling Dynamics of soil nitrogen and water in a selective thinning in the argentinian dry chacoDynamics of soil nitrogen and water in a selective thinning in the argentinian dry chacoDinamica del nitrogeno y del agua del suelo en un desmonte selectivo en el chaco arido Argentinosemiarid woodland; N immobilization-mineralization; soil respiration; ammonifierand nitrifier densitiessemiarid woodland; N immobilization-mineralization; soil respiration; ammonifierand nitrifier densitiesmonte semiárido; inmovilización y mineralización de N; respiración del suelo; densidad de amonificadores y nitrificadoresClearcutting for livestock production in the Dry Chaco is leading to shrub invasion and desertification. This trend could be avoided through a more rational management of the arboreous resources. The effects of a selective thinning (40% tree canopy cover) on soil nitrogen and moisture dynamics were studied during one year. Accumulated N mineralization was 40% higher in the selective thinning than in the natural woodland (85% arbustive + tree canopy cover). Different patterns were observed under the dominant tree species. In the selective thinning, available N, N immobilized in microbial biomass and soil water content were significantly higher under Aspidosperma quebracho-blanco Schlecht., Apocinaceae. In the natural woodland, N availability and nitrifier densities were higher under Prosopis flexuosa DC, Fabaceae. The open interspaces between trees exhibited the lowest values of all measured parameters. Possible explanations of observed differences and implications for pasture production are discussed.Clearcutting for livestock production in the Dry Chaco is leading to shrub invasion and desertification. This trend could be avoided through a more rational management of the arboreous resources. The effects of a selective thinning (40% tree canopy cover) on soil nitrogen and moisture dynamics were studied during one year. Accumulated N mineralization was 40% higher in the selective thinning than in the natural woodland (85% arbustive + tree canopy cover). Different patterns were observed under the dominant tree species. In the selective thinning, available N, N immobilized in microbial biomass and soil water content were significantly higher under Aspidosperma quebracho-blanco Schlecht., Apocinaceae. In the natural woodland, N availability and nitrifier densities were higher under Prosopis flexuosa DC, Fabaceae. The open interspaces between trees exhibited the lowest values of all measured parameters. Possible explanations of observed differences and implications for pasture production are discussed.La tala del Chaco Arido argentino, para facilitar la producción ganadera, está conduciendo a problemas de arbustización y desertización, que podrian evitarse realizando un manejo racional del recurso arbóreo. Se estudió durante un año el efecto de un desmonte parcial (40% de cobertura arbórea) sobre la dinámica del N y la humedad del suelo. La mineralización acumulada de N fue 40% mayor en el desmonte selectivo que en el monte natural (85% de cobertura arbórea + arbustiva). Se observaron diferencias en los efectos de las dos especies arbóreas dominantes. En el desmonte selectivo la disponibilidad de N, N imnovilizado en biomassa microbiana y contenido de humedad del suelo fueron significativamente más altos bajo Aspidosperma quebracho-blanco Schlecht., Apocinácea. En el monte natural, en cambio, la mayor disponibilidad de N y densidad de nitrificadores se observó bajo Prosopis flexuosa DC, Fabácea. Los espacios abiertos entre árboles presentaron los valores más bajos de todas las variables medidas. Se discuten causas de las diferencias encontradas y probables implicancias en la productividad de las pasturas.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraOliva, LuisaMazzarino, Maria J.Nuñez, GabrielaAbril, AdrianaAcosta, Marta1993-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/3929Pesquisa Agropecuaria Brasileira; v.28, n.6, jun. 1993; 709-718Pesquisa Agropecuária Brasileira; v.28, n.6, jun. 1993; 709-7181678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/3929/1220info:eu-repo/semantics/openAccess2012-02-16T10:33:06Zoai:ojs.seer.sct.embrapa.br:article/3929Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2012-02-16T10:33:06Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Dynamics of soil nitrogen and water in a selective thinning in the argentinian dry chaco
Dynamics of soil nitrogen and water in a selective thinning in the argentinian dry chaco
Dinamica del nitrogeno y del agua del suelo en un desmonte selectivo en el chaco arido Argentino
title Dynamics of soil nitrogen and water in a selective thinning in the argentinian dry chaco
spellingShingle Dynamics of soil nitrogen and water in a selective thinning in the argentinian dry chaco
Oliva, Luisa
semiarid woodland; N immobilization-mineralization; soil respiration; ammonifierand nitrifier densities
semiarid woodland; N immobilization-mineralization; soil respiration; ammonifierand nitrifier densities
monte semiárido; inmovilización y mineralización de N; respiración del suelo; densidad de amonificadores y nitrificadores
title_short Dynamics of soil nitrogen and water in a selective thinning in the argentinian dry chaco
title_full Dynamics of soil nitrogen and water in a selective thinning in the argentinian dry chaco
title_fullStr Dynamics of soil nitrogen and water in a selective thinning in the argentinian dry chaco
title_full_unstemmed Dynamics of soil nitrogen and water in a selective thinning in the argentinian dry chaco
title_sort Dynamics of soil nitrogen and water in a selective thinning in the argentinian dry chaco
author Oliva, Luisa
author_facet Oliva, Luisa
Mazzarino, Maria J.
Nuñez, Gabriela
Abril, Adriana
Acosta, Marta
author_role author
author2 Mazzarino, Maria J.
Nuñez, Gabriela
Abril, Adriana
Acosta, Marta
author2_role author
author
author
author
dc.contributor.none.fl_str_mv


dc.contributor.author.fl_str_mv Oliva, Luisa
Mazzarino, Maria J.
Nuñez, Gabriela
Abril, Adriana
Acosta, Marta
dc.subject.por.fl_str_mv semiarid woodland; N immobilization-mineralization; soil respiration; ammonifierand nitrifier densities
semiarid woodland; N immobilization-mineralization; soil respiration; ammonifierand nitrifier densities
monte semiárido; inmovilización y mineralización de N; respiración del suelo; densidad de amonificadores y nitrificadores
topic semiarid woodland; N immobilization-mineralization; soil respiration; ammonifierand nitrifier densities
semiarid woodland; N immobilization-mineralization; soil respiration; ammonifierand nitrifier densities
monte semiárido; inmovilización y mineralización de N; respiración del suelo; densidad de amonificadores y nitrificadores
description Clearcutting for livestock production in the Dry Chaco is leading to shrub invasion and desertification. This trend could be avoided through a more rational management of the arboreous resources. The effects of a selective thinning (40% tree canopy cover) on soil nitrogen and moisture dynamics were studied during one year. Accumulated N mineralization was 40% higher in the selective thinning than in the natural woodland (85% arbustive + tree canopy cover). Different patterns were observed under the dominant tree species. In the selective thinning, available N, N immobilized in microbial biomass and soil water content were significantly higher under Aspidosperma quebracho-blanco Schlecht., Apocinaceae. In the natural woodland, N availability and nitrifier densities were higher under Prosopis flexuosa DC, Fabaceae. The open interspaces between trees exhibited the lowest values of all measured parameters. Possible explanations of observed differences and implications for pasture production are discussed.
publishDate 1993
dc.date.none.fl_str_mv 1993-06-01
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/3929
url https://seer.sct.embrapa.br/index.php/pab/article/view/3929
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/3929/1220
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.28, n.6, jun. 1993; 709-718
Pesquisa Agropecuária Brasileira; v.28, n.6, jun. 1993; 709-718
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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