Microbial quality of soil from the Pampa biome in response to different grazing pressures
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/128993 |
Resumo: | The aim of this study was to evaluate the impact of different grazing pressures on the activity and diversity of soil bacteria. We performed a long-term experiment in Eldorado do Sul, southern Brazil, that assessed three levels of grazing pressure: high pressure (HP), with 4% herbage allowance (HA), moderate pressure (MP), with 12% HA, and low pressure (LP), with 16% HA. Two reference areas were also assessed, one of never-grazed native vegetation (NG) and another of regenerated vegetation after two years of grazing (RG). Soil samples were evaluated for microbial biomass and enzymatic ( -glucosidase, arylsulfatase and urease) activities. The structure of the bacterial community and the population of diazotrophic bacteria were evaluated by RFLP of the 16S rRNA and nifH genes, respectively. The diversity of diazotrophic bacteria was assessed by partial sequencing of the 16S rDNA gene. The presence of grazing animals increased soil microbial biomass in MP and HP. The structures of the bacterial community and the populations of diazotrophic bacteria were altered by the different grazing managements, with a greater diversity of diazotrophic bacteria in the LP treatment. Based on the characteristics evaluated, the MP treatment was the most appropriate for animal production and conservation of the Pampa biome. |
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Vargas, Rafael da SilvaBataiolli, Renata D' OliveiraCosta, Pedro Beschoren daLisboa, Bruno BrittoPassaglia, Luciane Maria PereiraSilveira, Anelise Beneduzi daVargas, Luciano Kayser2015-11-07T02:36:43Z20151415-4757http://hdl.handle.net/10183/128993000969204The aim of this study was to evaluate the impact of different grazing pressures on the activity and diversity of soil bacteria. We performed a long-term experiment in Eldorado do Sul, southern Brazil, that assessed three levels of grazing pressure: high pressure (HP), with 4% herbage allowance (HA), moderate pressure (MP), with 12% HA, and low pressure (LP), with 16% HA. Two reference areas were also assessed, one of never-grazed native vegetation (NG) and another of regenerated vegetation after two years of grazing (RG). Soil samples were evaluated for microbial biomass and enzymatic ( -glucosidase, arylsulfatase and urease) activities. The structure of the bacterial community and the population of diazotrophic bacteria were evaluated by RFLP of the 16S rRNA and nifH genes, respectively. The diversity of diazotrophic bacteria was assessed by partial sequencing of the 16S rDNA gene. The presence of grazing animals increased soil microbial biomass in MP and HP. The structures of the bacterial community and the populations of diazotrophic bacteria were altered by the different grazing managements, with a greater diversity of diazotrophic bacteria in the LP treatment. Based on the characteristics evaluated, the MP treatment was the most appropriate for animal production and conservation of the Pampa biome.application/pdfengGenetics and molecular biology. Ribeirão Preto, SP. Vol. 38, no. 2 (2015), p. 205-212Bactéria diazotróficaDiversidade biológicaPastagemBacterial diversity,, , .Diazotrophic bacteriaDiversity,Soil microbial communitiesGrasslandsMicrobial quality of soil from the Pampa biome in response to different grazing pressuresinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000969204.pdf000969204.pdfTexto completo (inglês)application/pdf591061http://www.lume.ufrgs.br/bitstream/10183/128993/1/000969204.pdf9e3e21393482b70a00a169d6fd40b0baMD51TEXT000969204.pdf.txt000969204.pdf.txtExtracted Texttext/plain35698http://www.lume.ufrgs.br/bitstream/10183/128993/2/000969204.pdf.txtb448732f89f2d254ba7e4dc5b973f427MD52THUMBNAIL000969204.pdf.jpg000969204.pdf.jpgGenerated Thumbnailimage/jpeg1893http://www.lume.ufrgs.br/bitstream/10183/128993/3/000969204.pdf.jpg8bc0b0125e3c94f85309f5ff78c3eae4MD5310183/1289932023-12-21 04:32:54.019515oai:www.lume.ufrgs.br:10183/128993Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-12-21T06:32:54Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Microbial quality of soil from the Pampa biome in response to different grazing pressures |
title |
Microbial quality of soil from the Pampa biome in response to different grazing pressures |
spellingShingle |
Microbial quality of soil from the Pampa biome in response to different grazing pressures Vargas, Rafael da Silva Bactéria diazotrófica Diversidade biológica Pastagem Bacterial diversity,, , . Diazotrophic bacteria Diversity, Soil microbial communities Grasslands |
title_short |
Microbial quality of soil from the Pampa biome in response to different grazing pressures |
title_full |
Microbial quality of soil from the Pampa biome in response to different grazing pressures |
title_fullStr |
Microbial quality of soil from the Pampa biome in response to different grazing pressures |
title_full_unstemmed |
Microbial quality of soil from the Pampa biome in response to different grazing pressures |
title_sort |
Microbial quality of soil from the Pampa biome in response to different grazing pressures |
author |
Vargas, Rafael da Silva |
author_facet |
Vargas, Rafael da Silva Bataiolli, Renata D' Oliveira Costa, Pedro Beschoren da Lisboa, Bruno Britto Passaglia, Luciane Maria Pereira Silveira, Anelise Beneduzi da Vargas, Luciano Kayser |
author_role |
author |
author2 |
Bataiolli, Renata D' Oliveira Costa, Pedro Beschoren da Lisboa, Bruno Britto Passaglia, Luciane Maria Pereira Silveira, Anelise Beneduzi da Vargas, Luciano Kayser |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Vargas, Rafael da Silva Bataiolli, Renata D' Oliveira Costa, Pedro Beschoren da Lisboa, Bruno Britto Passaglia, Luciane Maria Pereira Silveira, Anelise Beneduzi da Vargas, Luciano Kayser |
dc.subject.por.fl_str_mv |
Bactéria diazotrófica Diversidade biológica Pastagem |
topic |
Bactéria diazotrófica Diversidade biológica Pastagem Bacterial diversity,, , . Diazotrophic bacteria Diversity, Soil microbial communities Grasslands |
dc.subject.eng.fl_str_mv |
Bacterial diversity,, , . Diazotrophic bacteria Diversity, Soil microbial communities Grasslands |
description |
The aim of this study was to evaluate the impact of different grazing pressures on the activity and diversity of soil bacteria. We performed a long-term experiment in Eldorado do Sul, southern Brazil, that assessed three levels of grazing pressure: high pressure (HP), with 4% herbage allowance (HA), moderate pressure (MP), with 12% HA, and low pressure (LP), with 16% HA. Two reference areas were also assessed, one of never-grazed native vegetation (NG) and another of regenerated vegetation after two years of grazing (RG). Soil samples were evaluated for microbial biomass and enzymatic ( -glucosidase, arylsulfatase and urease) activities. The structure of the bacterial community and the population of diazotrophic bacteria were evaluated by RFLP of the 16S rRNA and nifH genes, respectively. The diversity of diazotrophic bacteria was assessed by partial sequencing of the 16S rDNA gene. The presence of grazing animals increased soil microbial biomass in MP and HP. The structures of the bacterial community and the populations of diazotrophic bacteria were altered by the different grazing managements, with a greater diversity of diazotrophic bacteria in the LP treatment. Based on the characteristics evaluated, the MP treatment was the most appropriate for animal production and conservation of the Pampa biome. |
publishDate |
2015 |
dc.date.accessioned.fl_str_mv |
2015-11-07T02:36:43Z |
dc.date.issued.fl_str_mv |
2015 |
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info:eu-repo/semantics/article info:eu-repo/semantics/other |
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http://hdl.handle.net/10183/128993 |
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1415-4757 |
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000969204 |
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http://hdl.handle.net/10183/128993 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Genetics and molecular biology. Ribeirão Preto, SP. Vol. 38, no. 2 (2015), p. 205-212 |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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