Capim capivara: tratamentos pré-germinativos, superação da dormência de sementes e sensibilidade a herbicidas
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/5043 |
Resumo: | The West Indian Marsh Grass is a native grass to tropical areas of Central and South America, which grows in wetlands, supporting intermittent periods of flooding. Their forms of propagation by fragments of rhizomes, rooting of lower nodes of stem and the high seed production facilitates population growth and dispersal of the weed to new areas. In Brazil, beyond natural pasture in the Amazonia and Pantanal regions, has been reported as invasive flooded rice in Rio Grande do Sul. So, this study aimed to evaluate the efficiency of pre-germinative treatments on overcoming dormancy of seeds (Chapter I), determine the viability of their seeds, by adapting the methodology of the tetrazolium test (Chapter II) and finally determine the control and reduction of biomass, caused by different doses of selective herbicides and total control in young and perennial plants (Chapter III). Seed exposure to potassium nitrate 0.2%, immersion in water for 48 hours and removal of the glumes, promoted the overcoming dormancy and accelerated the germination process. The seeds analyzed had high viability (89%), and six hours of hydration of seeds without glumes, with subsequent longitudinal slitting of the embryos and immersed in tetrazolium solution at 0.5% for four hours at a temperature of 23 ± 1 ° C, was appropriate for the species. As to chemical control, young plants, showed greater sensitivity to lower doses of herbicides cyhalofop-butyl and ammonium glufosinate, however, in the doses tested, only the glyphosate and the formulated mixture de Imazapic and imazapir caused the death plants. In perennial plants, control and reduction of biomass, caused by both herbicides were unsatisfactory. |
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2017-05-102017-05-102011-02-25SILVA, Keli Souza da. India west marsh grass: pré-germinative trataments, overcoming dormancy of seedes and sensitivity herbicides. 2011. 72 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2011.http://repositorio.ufsm.br/handle/1/5043The West Indian Marsh Grass is a native grass to tropical areas of Central and South America, which grows in wetlands, supporting intermittent periods of flooding. Their forms of propagation by fragments of rhizomes, rooting of lower nodes of stem and the high seed production facilitates population growth and dispersal of the weed to new areas. In Brazil, beyond natural pasture in the Amazonia and Pantanal regions, has been reported as invasive flooded rice in Rio Grande do Sul. So, this study aimed to evaluate the efficiency of pre-germinative treatments on overcoming dormancy of seeds (Chapter I), determine the viability of their seeds, by adapting the methodology of the tetrazolium test (Chapter II) and finally determine the control and reduction of biomass, caused by different doses of selective herbicides and total control in young and perennial plants (Chapter III). Seed exposure to potassium nitrate 0.2%, immersion in water for 48 hours and removal of the glumes, promoted the overcoming dormancy and accelerated the germination process. The seeds analyzed had high viability (89%), and six hours of hydration of seeds without glumes, with subsequent longitudinal slitting of the embryos and immersed in tetrazolium solution at 0.5% for four hours at a temperature of 23 ± 1 ° C, was appropriate for the species. As to chemical control, young plants, showed greater sensitivity to lower doses of herbicides cyhalofop-butyl and ammonium glufosinate, however, in the doses tested, only the glyphosate and the formulated mixture de Imazapic and imazapir caused the death plants. In perennial plants, control and reduction of biomass, caused by both herbicides were unsatisfactory.O capim-capivara é uma gramínea nativa de áreas tropicais das Américas Central e do Sul, que vegeta lugares úmidos e pantanosos, suportando inundações por períodos intermitentes. Suas formas de propagação, por fragmentos de rizomas, enraizamento de nós caulinares basais e a elevada produção de sementes, facilitam o aumento da população e a dispersão dessa planta daninha por novas áreas. No Brasil, além de pastagem natural, nas regiões da Amazônia e Pantanal, tem sido relatada como invasora da cultura do arroz irrigado no Rio Grande do Sul. Em vista disso, este trabalho teve por objetivos, avaliar a eficiência de tratamentos pré-germinativos na superação da dormência de suas sementes (Capítulo I), determinar a viabilidade de suas sementes, através da adaptação da metodologia do teste de tetrazólio (Capítulo II) e por fim, determinar o controle e redução de biomassa, causado por diferentes doses de herbicidas seletivos e de controle total, em plantas jovens e perenizadas (Capitulo III). A exposição das sementes ao nitrato de potássio a 0,2%, a embebição em água por 48 horas e a remoção das glumas promoveram a superação da dormência e aceleraram o processo de germinação. As sementes analisadas apresentaram elevada viabilidade (89%), e o período de seis horas de hidratação das sementes sem glumas, com posterior corte longitudinal dos embriões e imersão em solução de tetrazólio a 0,5% por quatro horas, na temperatura de 23 ± 1°C, mostrou-se adequado para a espécie. Quanto ao controle químico, plantas jovens, mostraram maior sensibilidade a menores doses dos herbicidas cialofope-butílico e glufosinato de amônio, entretanto, nas doses testadas, somente o glifosato e a mistura formulada de imazapique e imazapir causaram a morte das plantas. Em plantas perenizadas, o controle e a redução da biomassa, causados por ambos os herbicidas foram insatisfatórios.Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorapplication/pdfporUniversidade Federal de Santa MariaPrograma de Pós-Graduação em AgronomiaUFSMBRAgronomiaHymenachne amplexicaulisArroz irrigadoSementesherbicidasHymenachne amplexicaulisFlooded riceSeedsHerbicidesCNPQ::CIENCIAS AGRARIAS::AGRONOMIACapim capivara: tratamentos pré-germinativos, superação da dormência de sementes e sensibilidade a herbicidasIndia west marsh grass: pré-germinative trataments, overcoming dormancy of seedes and sensitivity herbicidesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisMachado, Sérgio Luiz de Oliveirahttp://lattes.cnpq.br/0360886006002113Avila, Luis Antonio dehttp://lattes.cnpq.br/5245663326931142Menezes, Nilson Lemos dehttp://lattes.cnpq.br/0551755093817460http://lattes.cnpq.br/6871245613887064Silva, Keli Souza da500100000009400500500300300e60531fa-cb8f-416b-b6ca-73f0fb0c0428e6305dc8-f61e-43d4-8952-847330802f7fb829545a-2b15-4536-b2b1-25112defb576c901f62d-8bb9-4dd7-968a-1bbcb67a85f8info:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALSILVA, KELI SOUZA DA.pdfapplication/pdf1083432http://repositorio.ufsm.br/bitstream/1/5043/1/SILVA%2c%20KELI%20SOUZA%20DA.pdf262bf9fefc30d77c532c82cd98c6223eMD51TEXTSILVA, KELI SOUZA DA.pdf.txtSILVA, KELI SOUZA DA.pdf.txtExtracted texttext/plain124665http://repositorio.ufsm.br/bitstream/1/5043/2/SILVA%2c%20KELI%20SOUZA%20DA.pdf.txtb477ca4ae9d238685ed5bc3a7115af7bMD52THUMBNAILSILVA, KELI SOUZA DA.pdf.jpgSILVA, KELI SOUZA DA.pdf.jpgIM Thumbnailimage/jpeg5020http://repositorio.ufsm.br/bitstream/1/5043/3/SILVA%2c%20KELI%20SOUZA%20DA.pdf.jpg5062d5d65d46073176eeb694998a1bbbMD531/50432022-08-18 15:46:35.986oai:repositorio.ufsm.br:1/5043Repositório Institucionalhttp://repositorio.ufsm.br/PUBhttp://repositorio.ufsm.br/oai/requestopendoar:39132022-08-18T18:46:35Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.por.fl_str_mv |
Capim capivara: tratamentos pré-germinativos, superação da dormência de sementes e sensibilidade a herbicidas |
dc.title.alternative.eng.fl_str_mv |
India west marsh grass: pré-germinative trataments, overcoming dormancy of seedes and sensitivity herbicides |
title |
Capim capivara: tratamentos pré-germinativos, superação da dormência de sementes e sensibilidade a herbicidas |
spellingShingle |
Capim capivara: tratamentos pré-germinativos, superação da dormência de sementes e sensibilidade a herbicidas Silva, Keli Souza da Hymenachne amplexicaulis Arroz irrigado Sementes herbicidas Hymenachne amplexicaulis Flooded rice Seeds Herbicides CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
title_short |
Capim capivara: tratamentos pré-germinativos, superação da dormência de sementes e sensibilidade a herbicidas |
title_full |
Capim capivara: tratamentos pré-germinativos, superação da dormência de sementes e sensibilidade a herbicidas |
title_fullStr |
Capim capivara: tratamentos pré-germinativos, superação da dormência de sementes e sensibilidade a herbicidas |
title_full_unstemmed |
Capim capivara: tratamentos pré-germinativos, superação da dormência de sementes e sensibilidade a herbicidas |
title_sort |
Capim capivara: tratamentos pré-germinativos, superação da dormência de sementes e sensibilidade a herbicidas |
author |
Silva, Keli Souza da |
author_facet |
Silva, Keli Souza da |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Machado, Sérgio Luiz de Oliveira |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/0360886006002113 |
dc.contributor.advisor-co1.fl_str_mv |
Avila, Luis Antonio de |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/5245663326931142 |
dc.contributor.referee1.fl_str_mv |
Menezes, Nilson Lemos de |
dc.contributor.referee1Lattes.fl_str_mv |
http://lattes.cnpq.br/0551755093817460 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/6871245613887064 |
dc.contributor.author.fl_str_mv |
Silva, Keli Souza da |
contributor_str_mv |
Machado, Sérgio Luiz de Oliveira Avila, Luis Antonio de Menezes, Nilson Lemos de |
dc.subject.por.fl_str_mv |
Hymenachne amplexicaulis Arroz irrigado Sementes herbicidas |
topic |
Hymenachne amplexicaulis Arroz irrigado Sementes herbicidas Hymenachne amplexicaulis Flooded rice Seeds Herbicides CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
dc.subject.eng.fl_str_mv |
Hymenachne amplexicaulis Flooded rice Seeds Herbicides |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
description |
The West Indian Marsh Grass is a native grass to tropical areas of Central and South America, which grows in wetlands, supporting intermittent periods of flooding. Their forms of propagation by fragments of rhizomes, rooting of lower nodes of stem and the high seed production facilitates population growth and dispersal of the weed to new areas. In Brazil, beyond natural pasture in the Amazonia and Pantanal regions, has been reported as invasive flooded rice in Rio Grande do Sul. So, this study aimed to evaluate the efficiency of pre-germinative treatments on overcoming dormancy of seeds (Chapter I), determine the viability of their seeds, by adapting the methodology of the tetrazolium test (Chapter II) and finally determine the control and reduction of biomass, caused by different doses of selective herbicides and total control in young and perennial plants (Chapter III). Seed exposure to potassium nitrate 0.2%, immersion in water for 48 hours and removal of the glumes, promoted the overcoming dormancy and accelerated the germination process. The seeds analyzed had high viability (89%), and six hours of hydration of seeds without glumes, with subsequent longitudinal slitting of the embryos and immersed in tetrazolium solution at 0.5% for four hours at a temperature of 23 ± 1 ° C, was appropriate for the species. As to chemical control, young plants, showed greater sensitivity to lower doses of herbicides cyhalofop-butyl and ammonium glufosinate, however, in the doses tested, only the glyphosate and the formulated mixture de Imazapic and imazapir caused the death plants. In perennial plants, control and reduction of biomass, caused by both herbicides were unsatisfactory. |
publishDate |
2011 |
dc.date.issued.fl_str_mv |
2011-02-25 |
dc.date.accessioned.fl_str_mv |
2017-05-10 |
dc.date.available.fl_str_mv |
2017-05-10 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
SILVA, Keli Souza da. India west marsh grass: pré-germinative trataments, overcoming dormancy of seedes and sensitivity herbicides. 2011. 72 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2011. |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/5043 |
identifier_str_mv |
SILVA, Keli Souza da. India west marsh grass: pré-germinative trataments, overcoming dormancy of seedes and sensitivity herbicides. 2011. 72 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2011. |
url |
http://repositorio.ufsm.br/handle/1/5043 |
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por |
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por |
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openAccess |
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Universidade Federal de Santa Maria |
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UFSM |
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BR |
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Agronomia |
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