Seed longevity of Eragrostis plana Nees buried in natural grassland soil
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/115393 |
Resumo: | The objective of this research was to evaluate the seed longevity of Eragrostis plana Nees buried at different soil depths, in a natural-grassland area in the Pampa biome (46 m altitude, 30º05´S and 51º40´W) of Rio Grande do Sul State, Brazil. The experimental design was a split-plot type in complete blocks with two factors: seeds buried at five different depth levels (soil surface and 2.5, 5, 10 and 20 cm) and seven exhumation dates. The blocks were allocated in natural grassland grazed by cattle, allocated in a 12-m-long transection. Fifty-four permeable nylon bags filled with 100 seeds in each division, with five vertical divisions, were buried in each row. Seven exhumation dates were used: the first on October 14, 2003 and the last on January 14, 2006. The percentage of viable seeds of E. plana, collected at seven exhumation times and set at different depths in the soil horizon, were described by simple negative exponential equations. Based on the model, the percentage of viable seeds collected at the five depths, (soil surface and 2.5, 5, 10, and 20 cm), after 2.5 years of burial, were 0.1, 0.5, 1.0, 7.4 and 22.1%, respectively. Increase in depth is directly associated with physical and physiological seed integrity of E. plana. Negative simple exponential equations can be used to predict seed longevity of E. plana buried in nylon bags. This invader species accumulates soil seed-bank of high longevity. |
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Medeiros, Renato Borges deFocht, TelmoMenegon, Leandro LuizFreitas, Mário Ruschel2015-04-17T01:58:03Z20141516-3598http://hdl.handle.net/10183/115393000952893The objective of this research was to evaluate the seed longevity of Eragrostis plana Nees buried at different soil depths, in a natural-grassland area in the Pampa biome (46 m altitude, 30º05´S and 51º40´W) of Rio Grande do Sul State, Brazil. The experimental design was a split-plot type in complete blocks with two factors: seeds buried at five different depth levels (soil surface and 2.5, 5, 10 and 20 cm) and seven exhumation dates. The blocks were allocated in natural grassland grazed by cattle, allocated in a 12-m-long transection. Fifty-four permeable nylon bags filled with 100 seeds in each division, with five vertical divisions, were buried in each row. Seven exhumation dates were used: the first on October 14, 2003 and the last on January 14, 2006. The percentage of viable seeds of E. plana, collected at seven exhumation times and set at different depths in the soil horizon, were described by simple negative exponential equations. Based on the model, the percentage of viable seeds collected at the five depths, (soil surface and 2.5, 5, 10, and 20 cm), after 2.5 years of burial, were 0.1, 0.5, 1.0, 7.4 and 22.1%, respectively. Increase in depth is directly associated with physical and physiological seed integrity of E. plana. Negative simple exponential equations can be used to predict seed longevity of E. plana buried in nylon bags. This invader species accumulates soil seed-bank of high longevity.application/pdfengRevista brasileira de zootecnia= Brazilian journal of animal science [recurso eletrônico]. Viçosa, MG. Vol. 43, n. 11 (nov. 2014), p. 561-567Bioma PampaInvasão biológicaSementeBiological invasionInvader speciesPampa biomeRecovered seedsSeed bankSurviving seedsSeed longevity of Eragrostis plana Nees buried in natural grassland soilinfo: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:UFRGSORIGINAL000952893.pdf000952893.pdfTexto completo (inglês)application/pdf1266693http://www.lume.ufrgs.br/bitstream/10183/115393/1/000952893.pdf445229152d91d5f074971958be33467fMD51TEXT000952893.pdf.txt000952893.pdf.txtExtracted Texttext/plain30849http://www.lume.ufrgs.br/bitstream/10183/115393/2/000952893.pdf.txtdf2db5684c324010205a714e361729f4MD52THUMBNAIL000952893.pdf.jpg000952893.pdf.jpgGenerated Thumbnailimage/jpeg2293http://www.lume.ufrgs.br/bitstream/10183/115393/3/000952893.pdf.jpge4e59179c621792958567b78d3cec68fMD5310183/1153932018-10-19 10:46:54.799oai:www.lume.ufrgs.br:10183/115393Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-19T13:46:54Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Seed longevity of Eragrostis plana Nees buried in natural grassland soil |
title |
Seed longevity of Eragrostis plana Nees buried in natural grassland soil |
spellingShingle |
Seed longevity of Eragrostis plana Nees buried in natural grassland soil Medeiros, Renato Borges de Bioma Pampa Invasão biológica Semente Biological invasion Invader species Pampa biome Recovered seeds Seed bank Surviving seeds |
title_short |
Seed longevity of Eragrostis plana Nees buried in natural grassland soil |
title_full |
Seed longevity of Eragrostis plana Nees buried in natural grassland soil |
title_fullStr |
Seed longevity of Eragrostis plana Nees buried in natural grassland soil |
title_full_unstemmed |
Seed longevity of Eragrostis plana Nees buried in natural grassland soil |
title_sort |
Seed longevity of Eragrostis plana Nees buried in natural grassland soil |
author |
Medeiros, Renato Borges de |
author_facet |
Medeiros, Renato Borges de Focht, Telmo Menegon, Leandro Luiz Freitas, Mário Ruschel |
author_role |
author |
author2 |
Focht, Telmo Menegon, Leandro Luiz Freitas, Mário Ruschel |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Medeiros, Renato Borges de Focht, Telmo Menegon, Leandro Luiz Freitas, Mário Ruschel |
dc.subject.por.fl_str_mv |
Bioma Pampa Invasão biológica Semente |
topic |
Bioma Pampa Invasão biológica Semente Biological invasion Invader species Pampa biome Recovered seeds Seed bank Surviving seeds |
dc.subject.eng.fl_str_mv |
Biological invasion Invader species Pampa biome Recovered seeds Seed bank Surviving seeds |
description |
The objective of this research was to evaluate the seed longevity of Eragrostis plana Nees buried at different soil depths, in a natural-grassland area in the Pampa biome (46 m altitude, 30º05´S and 51º40´W) of Rio Grande do Sul State, Brazil. The experimental design was a split-plot type in complete blocks with two factors: seeds buried at five different depth levels (soil surface and 2.5, 5, 10 and 20 cm) and seven exhumation dates. The blocks were allocated in natural grassland grazed by cattle, allocated in a 12-m-long transection. Fifty-four permeable nylon bags filled with 100 seeds in each division, with five vertical divisions, were buried in each row. Seven exhumation dates were used: the first on October 14, 2003 and the last on January 14, 2006. The percentage of viable seeds of E. plana, collected at seven exhumation times and set at different depths in the soil horizon, were described by simple negative exponential equations. Based on the model, the percentage of viable seeds collected at the five depths, (soil surface and 2.5, 5, 10, and 20 cm), after 2.5 years of burial, were 0.1, 0.5, 1.0, 7.4 and 22.1%, respectively. Increase in depth is directly associated with physical and physiological seed integrity of E. plana. Negative simple exponential equations can be used to predict seed longevity of E. plana buried in nylon bags. This invader species accumulates soil seed-bank of high longevity. |
publishDate |
2014 |
dc.date.issued.fl_str_mv |
2014 |
dc.date.accessioned.fl_str_mv |
2015-04-17T01:58:03Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/other |
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info:eu-repo/semantics/publishedVersion |
format |
article |
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publishedVersion |
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http://hdl.handle.net/10183/115393 |
dc.identifier.issn.pt_BR.fl_str_mv |
1516-3598 |
dc.identifier.nrb.pt_BR.fl_str_mv |
000952893 |
identifier_str_mv |
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url |
http://hdl.handle.net/10183/115393 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Revista brasileira de zootecnia= Brazilian journal of animal science [recurso eletrônico]. Viçosa, MG. Vol. 43, n. 11 (nov. 2014), p. 561-567 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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