Stapf colhidas por varredura manual ou mecanizada Components of seed production of two cultivars of Brachiaria
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Semina. Ciências Agrárias (Online) |
Texto Completo: | https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/9712 |
Resumo: | The objective of this study was to evaluate the seed production compounds and productivity of seeds of cvs. Marandu and Xaraés of Brachiaria brizantha (Hochst. ex A. Rich.) Stapf harvest by manual or mechanical sweeping. There was used completely randomized design, with 20 replications, quantifying reproductive tillers density, number of racemes/tiller, the length of basal raceme, number of spikelets / raceme, and the pure seed productivety/ha, using squares of 1m2 in the seed production field with 320 and 80 ha sowing with cvs. Xaraés and Marandu, respectively, in the Sagrillo Farmer, Barreiras, western Bahia State-Brazil, with samples occurring from May to Jun of 2008. The seeds harvest manually handle were analyzed in pureness, germination, and seedling vigor under three depths in sand box (1, 2 and, 4 cm). The data were statistically analyzed by ASSISTAT program, assuming as significative differences between averages when F values were lower than 0.05 by the test Tukey. The cv. Xaraés showed more reproductive tiller density (206/m2), higher number of racemes (7.25) and more length per raceme (15.8 cm) than the cv. Marandu (100 tillers/m2, 6.80 racemes/tiller e 14.9 cm/raceme, respectively). However, the number of spikelets by raceme was the same (50.8 units). The pure seed productivity was higher in the cv. Xaraés (188 kg/ha) than the cv. Marandu (154 kg/ha). Germination in sand was not different between cultivars, harvest method, or depth of seed. However, seedling development decreased with increase of seed depth from 1 and 2 cm to 4 cm. The cv. Xaraés was superior considering the seed production compounds, resulting in higher seed productivity, while quality did not differ between cultivars or harvest method. |
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Semina. Ciências Agrárias (Online) |
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Stapf colhidas por varredura manual ou mecanizada Components of seed production of two cultivars of BrachiariaComponentes da produção e qualidade de sementes dos cultivares marandu e xaraés de Brachiaria brizantha (Hochst. ex A. Rich.)SpikeletsPoaceaeRacemes.Produção e Beneficiamento de SementesEspiguetasPoaceaeRacemos.Produção e Beneficiamento de SementesThe objective of this study was to evaluate the seed production compounds and productivity of seeds of cvs. Marandu and Xaraés of Brachiaria brizantha (Hochst. ex A. Rich.) Stapf harvest by manual or mechanical sweeping. There was used completely randomized design, with 20 replications, quantifying reproductive tillers density, number of racemes/tiller, the length of basal raceme, number of spikelets / raceme, and the pure seed productivety/ha, using squares of 1m2 in the seed production field with 320 and 80 ha sowing with cvs. Xaraés and Marandu, respectively, in the Sagrillo Farmer, Barreiras, western Bahia State-Brazil, with samples occurring from May to Jun of 2008. The seeds harvest manually handle were analyzed in pureness, germination, and seedling vigor under three depths in sand box (1, 2 and, 4 cm). The data were statistically analyzed by ASSISTAT program, assuming as significative differences between averages when F values were lower than 0.05 by the test Tukey. The cv. Xaraés showed more reproductive tiller density (206/m2), higher number of racemes (7.25) and more length per raceme (15.8 cm) than the cv. Marandu (100 tillers/m2, 6.80 racemes/tiller e 14.9 cm/raceme, respectively). However, the number of spikelets by raceme was the same (50.8 units). The pure seed productivity was higher in the cv. Xaraés (188 kg/ha) than the cv. Marandu (154 kg/ha). Germination in sand was not different between cultivars, harvest method, or depth of seed. However, seedling development decreased with increase of seed depth from 1 and 2 cm to 4 cm. The cv. Xaraés was superior considering the seed production compounds, resulting in higher seed productivity, while quality did not differ between cultivars or harvest method.Objetivou-se com este trabalho avaliar os componentes da produção e a qualidade de sementes dos cvs. Marandu e Xaraés de Brachiaria brizantha (Hochst. ex A. Rich.) Stapf nos cerrados baianos, colhida por varredura manual ou mecanizada. Foi utilizado delineamento inteiramente casualizado, com 20 repetições, quantificando a densidade de perfilhos reprodutivos, o número de rácemos/perfilho, comprimento do rácemo basal, número de espiguetas/rácemo e produtividade de sementes puras/ha, utilizando um quadrado de 1m2 em campo de produção com 320 e 80 ha dos cvs. Xaraés e cv. Marandu, respectivamente, na Fazenda Sagrillo, município de Barreiras, oeste do Estado da Bahia, com avaliações de campo entre maio e junho de 2008. As sementes colhidas por varredura manual e mecanicamente foram analisadas quanto à pureza, germinação e vigor de plântula a três profundidades de semeadura em caixa de areia (1, 2 e 4 cm). Os dados foram analisados estatisticamente no programa ASSISTAT, assumindo como significativas diferenças entre médias cujos valores de F forem menores que 0,05%, pelo teste Tukey. A cv. Xaraés apresentou maior densidade de perfilhos reprodutivos (206/m2), racemos em maior número (7,25) e mais compridos (15,8 cm) que o cv. Marandu (100 perfilhos/m2, 6,80 rácemos/perfilho e 14,9 cm/rácemo, respectivamente). Entretanto, o número de espiguetas por racemo foi semelhante (50,8 unidades). A produtividade de sementes puras foi maior no cv. Xaraés (188 kg/ha) que no cv. Marandu (154 kg/ha). A germinação na caixa de areia não diferiu entre os cultivares, método de colheita, ou profundidade de semeadura. Todavia, o vigor de plântula diminuiu com o aumento da profundidade de semeadura de 1 e 2 cm para 4 cm. O cv. Xaraés apresentou componentes da produção de sementes mais favoráveis resultando em maior produtividade, enquanto a qualidade não diferiu entre cultivares ou método de colheita.UEL2012-10-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPesquisa HistóricaPesquisa Históricaapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/971210.5433/1679-0359.2012v33n5p2019Semina: Ciências Agrárias; Vol. 33 No. 5 (2012); 2019-2028Semina: Ciências Agrárias; v. 33 n. 5 (2012); 2019-20281679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELporhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/9712/11581Quadros, Danilo Gusmão deAndrade, Alexandro PereiraOliveira, Gina Carla deOliveira, Eduardo PereiraMoscon, Eder Stolbeninfo:eu-repo/semantics/openAccess2015-11-19T18:37:21Zoai:ojs.pkp.sfu.ca:article/9712Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2015-11-19T18:37:21Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false |
dc.title.none.fl_str_mv |
Stapf colhidas por varredura manual ou mecanizada Components of seed production of two cultivars of Brachiaria Componentes da produção e qualidade de sementes dos cultivares marandu e xaraés de Brachiaria brizantha (Hochst. ex A. Rich.) |
title |
Stapf colhidas por varredura manual ou mecanizada Components of seed production of two cultivars of Brachiaria |
spellingShingle |
Stapf colhidas por varredura manual ou mecanizada Components of seed production of two cultivars of Brachiaria Quadros, Danilo Gusmão de Spikelets Poaceae Racemes. Produção e Beneficiamento de Sementes Espiguetas Poaceae Racemos. Produção e Beneficiamento de Sementes |
title_short |
Stapf colhidas por varredura manual ou mecanizada Components of seed production of two cultivars of Brachiaria |
title_full |
Stapf colhidas por varredura manual ou mecanizada Components of seed production of two cultivars of Brachiaria |
title_fullStr |
Stapf colhidas por varredura manual ou mecanizada Components of seed production of two cultivars of Brachiaria |
title_full_unstemmed |
Stapf colhidas por varredura manual ou mecanizada Components of seed production of two cultivars of Brachiaria |
title_sort |
Stapf colhidas por varredura manual ou mecanizada Components of seed production of two cultivars of Brachiaria |
author |
Quadros, Danilo Gusmão de |
author_facet |
Quadros, Danilo Gusmão de Andrade, Alexandro Pereira Oliveira, Gina Carla de Oliveira, Eduardo Pereira Moscon, Eder Stolben |
author_role |
author |
author2 |
Andrade, Alexandro Pereira Oliveira, Gina Carla de Oliveira, Eduardo Pereira Moscon, Eder Stolben |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Quadros, Danilo Gusmão de Andrade, Alexandro Pereira Oliveira, Gina Carla de Oliveira, Eduardo Pereira Moscon, Eder Stolben |
dc.subject.por.fl_str_mv |
Spikelets Poaceae Racemes. Produção e Beneficiamento de Sementes Espiguetas Poaceae Racemos. Produção e Beneficiamento de Sementes |
topic |
Spikelets Poaceae Racemes. Produção e Beneficiamento de Sementes Espiguetas Poaceae Racemos. Produção e Beneficiamento de Sementes |
description |
The objective of this study was to evaluate the seed production compounds and productivity of seeds of cvs. Marandu and Xaraés of Brachiaria brizantha (Hochst. ex A. Rich.) Stapf harvest by manual or mechanical sweeping. There was used completely randomized design, with 20 replications, quantifying reproductive tillers density, number of racemes/tiller, the length of basal raceme, number of spikelets / raceme, and the pure seed productivety/ha, using squares of 1m2 in the seed production field with 320 and 80 ha sowing with cvs. Xaraés and Marandu, respectively, in the Sagrillo Farmer, Barreiras, western Bahia State-Brazil, with samples occurring from May to Jun of 2008. The seeds harvest manually handle were analyzed in pureness, germination, and seedling vigor under three depths in sand box (1, 2 and, 4 cm). The data were statistically analyzed by ASSISTAT program, assuming as significative differences between averages when F values were lower than 0.05 by the test Tukey. The cv. Xaraés showed more reproductive tiller density (206/m2), higher number of racemes (7.25) and more length per raceme (15.8 cm) than the cv. Marandu (100 tillers/m2, 6.80 racemes/tiller e 14.9 cm/raceme, respectively). However, the number of spikelets by raceme was the same (50.8 units). The pure seed productivity was higher in the cv. Xaraés (188 kg/ha) than the cv. Marandu (154 kg/ha). Germination in sand was not different between cultivars, harvest method, or depth of seed. However, seedling development decreased with increase of seed depth from 1 and 2 cm to 4 cm. The cv. Xaraés was superior considering the seed production compounds, resulting in higher seed productivity, while quality did not differ between cultivars or harvest method. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-10-30 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Pesquisa Histórica Pesquisa Histórica |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/9712 10.5433/1679-0359.2012v33n5p2019 |
url |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/9712 |
identifier_str_mv |
10.5433/1679-0359.2012v33n5p2019 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/9712/11581 |
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 |
UEL |
publisher.none.fl_str_mv |
UEL |
dc.source.none.fl_str_mv |
Semina: Ciências Agrárias; Vol. 33 No. 5 (2012); 2019-2028 Semina: Ciências Agrárias; v. 33 n. 5 (2012); 2019-2028 1679-0359 1676-546X reponame:Semina. Ciências Agrárias (Online) instname:Universidade Estadual de Londrina (UEL) instacron:UEL |
instname_str |
Universidade Estadual de Londrina (UEL) |
instacron_str |
UEL |
institution |
UEL |
reponame_str |
Semina. Ciências Agrárias (Online) |
collection |
Semina. Ciências Agrárias (Online) |
repository.name.fl_str_mv |
Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL) |
repository.mail.fl_str_mv |
semina.agrarias@uel.br |
_version_ |
1799306065514332160 |