Characteristics of seeds of native grasses from "cerrado"
Autor(a) principal: | |
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Data de Publicação: | 1999 |
Outros Autores: | , |
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/5295 |
Resumo: | Some characteristics of seeds of 22 native grass species from cerrado region in Brazil, such as sterility, weight of full and empty seeds, possibility of ventilation and number of seeds per weight were evaluated. Species of the genus Aristida, Ctenium, Diectiomis and Schizachyrium showed the highest levels of fertile spikelets (higher than 50%); Andropogon and Hypogynium showed levels of fertile spikelets between 25-49%; whereas in Paspalum, Setaria and Thrazya the occurrence of fertile spikelets varied from 5 to 24% and in Axonopus it was lower than 5%. The average number of full seeds per gram varied from 20 in Paspalum reduncum to almost 3,000 in Aristida gibbosa, which affects the rate of sowing. The seeds classified as "hairy", with which the use of "de-awners" during processing is recommended, belonged to the species: Andropogon bicornis, Andropogon selloanus, Aristida gibbosa, Aristida recurvata, Aristida setifolia, Aristida torta, Ctenium cirrhosum, Diectiomis fastigiata, Hypogynium virgatum, Paspalum pectinatum, Paspalum polyphilum, Paspalum splendens, Paspalum stellatum and Schizachyrium microstachyum. The species classified as non "hairy", with which ventilation can be recommended, were: Axonopus barbigerus, Axonopus canescens, Paspalum gardnerianum, Paspalum pilosum, Paspalum reduncum, Paspalum trichostomum, Setaria geniculata and Thrasya glaziovii. |
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Characteristics of seeds of native grasses from "cerrado"Características de sementes de gramíneas nativas do cerradode-awn; spikelets; sterility of seeds; weight; rate of sowing; ventilationdesaristamento; espiguetas; esterilidade de sementes; massa; taxa de semeadura; ventilação Some characteristics of seeds of 22 native grass species from cerrado region in Brazil, such as sterility, weight of full and empty seeds, possibility of ventilation and number of seeds per weight were evaluated. Species of the genus Aristida, Ctenium, Diectiomis and Schizachyrium showed the highest levels of fertile spikelets (higher than 50%); Andropogon and Hypogynium showed levels of fertile spikelets between 25-49%; whereas in Paspalum, Setaria and Thrazya the occurrence of fertile spikelets varied from 5 to 24% and in Axonopus it was lower than 5%. The average number of full seeds per gram varied from 20 in Paspalum reduncum to almost 3,000 in Aristida gibbosa, which affects the rate of sowing. The seeds classified as "hairy", with which the use of "de-awners" during processing is recommended, belonged to the species: Andropogon bicornis, Andropogon selloanus, Aristida gibbosa, Aristida recurvata, Aristida setifolia, Aristida torta, Ctenium cirrhosum, Diectiomis fastigiata, Hypogynium virgatum, Paspalum pectinatum, Paspalum polyphilum, Paspalum splendens, Paspalum stellatum and Schizachyrium microstachyum. The species classified as non "hairy", with which ventilation can be recommended, were: Axonopus barbigerus, Axonopus canescens, Paspalum gardnerianum, Paspalum pilosum, Paspalum reduncum, Paspalum trichostomum, Setaria geniculata and Thrasya glaziovii.Avaliaram-se características de sementes de 22 espécies de gramíneas nativas do cerrado, como: ocorrência de esterilidade, massa de sementes cheias e vazias, possibilidade de ventilação e quantidade de sementes por peso. As espécies dos gêneros Aristida, Ctenium, Diectiomis e Schizachyrium apresentaram os maiores índices de espiguetas férteis (superior a 50%), enquanto as dos gêneros Andropogon e Hypogynium apresentaram valores intermediários (25-49%); em Paspalum, Setaria e Thrazya, a ocorrência de espiguetas férteis foi baixa (5-24%), e em Axonopus, muito baixa (inferior a 5%). O número médio de sementes cheias por grama variou de 20 em Paspalum reduncum a quase 3.000 em Aristida gibbosa; esta informação é importante na determinação da taxa de semeadura. As espécies consideradas palhentas, a respeito das quais recomenda-se o uso de desaristadores no beneficiamento, são as seguintes: Andropogon bicornis, Andropogon selloanus, Aristida gibbosa, Aristida recurvata, Aristida setifolia, Aristida torta, Ctenium cirrhosum, Diectiomis fastigiata, Hypogynium virgatum, Paspalum pectinatum, Paspalum polyphilum, Paspalum splendens, Paspalum stellatum e Schizachyrium microstachyum. As espécies classificadas como não palhentas, para as quais pode-se recomendar a ventilação, são: Axonopus barbigerus, Axonopus canescens, Paspalum gardnerianum, Paspalum pilosum, Paspalum reduncum, Paspalum trichostomum, Setaria geniculata e Thrasya glaziovii.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraCarmona, RicardoMartins, Carlos RomeroFávero, Alessandra Ferreira1999-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/5295Pesquisa Agropecuaria Brasileira; v.34, n.6, jun. 1999; 1067-1074Pesquisa Agropecuária Brasileira; v.34, n.6, jun. 1999; 1067-10741678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/5295/2487info:eu-repo/semantics/openAccess2010-07-13T12:45:28Zoai:ojs.seer.sct.embrapa.br:article/5295Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2010-07-13T12:45:28Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Characteristics of seeds of native grasses from "cerrado" Características de sementes de gramíneas nativas do cerrado |
title |
Characteristics of seeds of native grasses from "cerrado" |
spellingShingle |
Characteristics of seeds of native grasses from "cerrado" Carmona, Ricardo de-awn; spikelets; sterility of seeds; weight; rate of sowing; ventilation desaristamento; espiguetas; esterilidade de sementes; massa; taxa de semeadura; ventilação |
title_short |
Characteristics of seeds of native grasses from "cerrado" |
title_full |
Characteristics of seeds of native grasses from "cerrado" |
title_fullStr |
Characteristics of seeds of native grasses from "cerrado" |
title_full_unstemmed |
Characteristics of seeds of native grasses from "cerrado" |
title_sort |
Characteristics of seeds of native grasses from "cerrado" |
author |
Carmona, Ricardo |
author_facet |
Carmona, Ricardo Martins, Carlos Romero Fávero, Alessandra Ferreira |
author_role |
author |
author2 |
Martins, Carlos Romero Fávero, Alessandra Ferreira |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Carmona, Ricardo Martins, Carlos Romero Fávero, Alessandra Ferreira |
dc.subject.por.fl_str_mv |
de-awn; spikelets; sterility of seeds; weight; rate of sowing; ventilation desaristamento; espiguetas; esterilidade de sementes; massa; taxa de semeadura; ventilação |
topic |
de-awn; spikelets; sterility of seeds; weight; rate of sowing; ventilation desaristamento; espiguetas; esterilidade de sementes; massa; taxa de semeadura; ventilação |
description |
Some characteristics of seeds of 22 native grass species from cerrado region in Brazil, such as sterility, weight of full and empty seeds, possibility of ventilation and number of seeds per weight were evaluated. Species of the genus Aristida, Ctenium, Diectiomis and Schizachyrium showed the highest levels of fertile spikelets (higher than 50%); Andropogon and Hypogynium showed levels of fertile spikelets between 25-49%; whereas in Paspalum, Setaria and Thrazya the occurrence of fertile spikelets varied from 5 to 24% and in Axonopus it was lower than 5%. The average number of full seeds per gram varied from 20 in Paspalum reduncum to almost 3,000 in Aristida gibbosa, which affects the rate of sowing. The seeds classified as "hairy", with which the use of "de-awners" during processing is recommended, belonged to the species: Andropogon bicornis, Andropogon selloanus, Aristida gibbosa, Aristida recurvata, Aristida setifolia, Aristida torta, Ctenium cirrhosum, Diectiomis fastigiata, Hypogynium virgatum, Paspalum pectinatum, Paspalum polyphilum, Paspalum splendens, Paspalum stellatum and Schizachyrium microstachyum. The species classified as non "hairy", with which ventilation can be recommended, were: Axonopus barbigerus, Axonopus canescens, Paspalum gardnerianum, Paspalum pilosum, Paspalum reduncum, Paspalum trichostomum, Setaria geniculata and Thrasya glaziovii. |
publishDate |
1999 |
dc.date.none.fl_str_mv |
1999-06-01 |
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/5295 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/5295 |
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/5295/2487 |
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.34, n.6, jun. 1999; 1067-1074 Pesquisa Agropecuária Brasileira; v.34, n.6, jun. 1999; 1067-1074 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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1793416703889113088 |