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 | Acesso ao texto completo restrito à biblioteca da Embrapa Unidades Centrais. Para informações adicionais entre em contato com biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura; Embrapa Unidades Centrais. |
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Data corrente: |
30/08/2000 |
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Data da última atualização: |
20/01/2014 |
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Autoria: |
RODRIGUES, C. M. |
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Afiliação: |
CYRO MASCARENHAS RODRIGUES. |
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Título: |
Pesquisa em comunicação rural no Brasil diagnostico e perspectivas. |
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Ano de publicação: |
1972 |
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Fonte/Imprenta: |
São Paulo: Universidade de São Paulo, 1972. |
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Páginas: |
17p. |
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Idioma: |
Português |
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Conteúdo: |
A pesquisa em comunicação rural no Brasil e recente. Muito pouco foi feito, embora se reconheça a qualidade e os alcances pratico e científico dos trabalhos ate então concluídos. As instituições, ao que parece, não tem encarado o problemas com a prioridade que merece. Existem iniciativas isoladas em diversos pontos do pais cujos resultados não são amplamente divulgados. Com excessão do livro publicado por Gordon Whiting Guimarães difusão de inovações que aborda no cap. VII os eventos realizados no Brasil, pouco se conhece sobre os resultados de pesquisa em comunicação. |
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Palavras-Chave: |
Comunicacao rural; Rural communication. |
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Thesagro: |
Pesquisa. |
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Thesaurus Nal: |
research. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01076nam a2200169 a 4500
001 1639784
005 2014-01-20
008 1972 bl uuuu u0uu1 u #d
100 1 $aRODRIGUES, C. M.
245 $aPesquisa em comunicação rural no Brasil diagnostico e perspectivas.$h[electronic resource]
260 $aSão Paulo: Universidade de São Paulo$c1972
300 $a17p.
520 $aA pesquisa em comunicação rural no Brasil e recente. Muito pouco foi feito, embora se reconheça a qualidade e os alcances pratico e científico dos trabalhos ate então concluídos. As instituições, ao que parece, não tem encarado o problemas com a prioridade que merece. Existem iniciativas isoladas em diversos pontos do pais cujos resultados não são amplamente divulgados. Com excessão do livro publicado por Gordon Whiting Guimarães difusão de inovações que aborda no cap. VII os eventos realizados no Brasil, pouco se conhece sobre os resultados de pesquisa em comunicação.
650 $aresearch
650 $aPesquisa
653 $aComunicacao rural
653 $aRural communication
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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Biblioteca |
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Registro Completo
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Biblioteca(s): |
Embrapa Trigo. |
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Data corrente: |
07/06/2021 |
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Data da última atualização: |
10/12/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MARINHO, J. de L.; SILVA, S. R.; SOUZA, D. N. DE; FONSECA, I. C. DE B.; BAZZO, J. H. B.; ZUCARELI, C. |
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Afiliação: |
JÉSSIA DE LUCENA MARINHO, Doctoral Student in the Graduate Program in Agronomy, Center for Agricultural Sciences, State University of Londrina, UEL, Londrina, PR, Brazil. E-mail: jlmarinho@live.com; SERGIO RICARDO SILVA, CNPT; DIOGO NASCIMENTO DE SOUZA, M.e, Agronomist employed in Syngenta Seeds, Maringá, PR, Brazil. E-mail: di.nsouza@gmail.com; INÊS CRISTINA DE BATISTA FONSECA, Profs. Drs., Department of Agronomy, Center for Agricultural Sciences, UEL, Londrina, PR, Brazil. E-mail: inescbf@uel. br; josebazzo@uel.br; claudemircca@uel.br; JOSÉ HENRIQUE BIZZARRI BAZZO, Profs. Drs., Department of Agronomy, Center for Agricultural Sciences, UEL, Londrina, PR, Brazil. E-mail: inescbf@uel. br; josebazzo@uel.br; claudemircca@uel.br; CLAUDEMIR ZUCARELI, Profs. Drs., Department of Agronomy, Center for Agricultural Sciences, UEL, Londrina, PR, Brazil. E-mail: inescbf@uel. br; josebazzo@uel.br; claudemircca@uel.br. |
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Título: |
Wheat yield and seed physiological quality affected by initial seed vigor, sowing density, and environmental conditions |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Sêmina: Ciências Agrárias, v. 42, n. 3, supl. 1, p. 1595-1614, 2021 |
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Idioma: |
Inglês |
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Conteúdo: |
Optimization of seed density range, combined with the use of quality seeds may help generate more profit from wheat production, as these factors affect grain yield and the quality of seeds. The aim of this study was to evaluate the effects of initial vigor level and sowing densities on the productive performance of the plants and the physiological performance of the seeds of two wheat cultivars in two cultivation environments. The experiment was carried out in the cities of Londrina and Ponta Grossa, Paraná, Brazil, in a randomized block design with four replications, following a 2 × 2 × 4 factorial scheme with two levels of seed vigor (high and low), two cultivars (BRS Gralha-Azul and BRS Sabiá), and four sowing densities (150, 250, 350, and 450 seeds m-2). The following characteristics were evaluated: emerged seedlings, shoot dry matter, spike density, vegetation index, and grain yield. Additionally, the physiological potential of the seeds produced in Londrina was evaluated by first germination count, germination, accelerated aging, seedling emergence, and emergence speed index tests. The increase in density up to 450 seeds m-2 favored the productive performance of the crop in both cultivation environments; however, it reduced the physiological performance of the seeds produced in Londrina. The cultivars BRS Gralha-Azul and BRS Sabiá had better performance and grain yield in Londrina and Ponta Grossa, respectively. High-vigor seeds favored the establishment of the stand, especially under unfavorable environmental conditions. Key words: Germination. Plant population. Seed quality. Triticum aestivum L. MenosOptimization of seed density range, combined with the use of quality seeds may help generate more profit from wheat production, as these factors affect grain yield and the quality of seeds. The aim of this study was to evaluate the effects of initial vigor level and sowing densities on the productive performance of the plants and the physiological performance of the seeds of two wheat cultivars in two cultivation environments. The experiment was carried out in the cities of Londrina and Ponta Grossa, Paraná, Brazil, in a randomized block design with four replications, following a 2 × 2 × 4 factorial scheme with two levels of seed vigor (high and low), two cultivars (BRS Gralha-Azul and BRS Sabiá), and four sowing densities (150, 250, 350, and 450 seeds m-2). The following characteristics were evaluated: emerged seedlings, shoot dry matter, spike density, vegetation index, and grain yield. Additionally, the physiological potential of the seeds produced in Londrina was evaluated by first germination count, germination, accelerated aging, seedling emergence, and emergence speed index tests. The increase in density up to 450 seeds m-2 favored the productive performance of the crop in both cultivation environments; however, it reduced the physiological performance of the seeds produced in Londrina. The cultivars BRS Gralha-Azul and BRS Sabiá had better performance and grain yield in Londrina and Ponta Grossa, respectively. High-vigor seeds favored the establishment of the stand, ... Mostrar Tudo |
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Thesagro: |
Aspecto Fisiológico; Densidade de Semeadura; Fisiologia; Grão; Semeadura; Semente; Trigo. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/223666/1/Marinho.et.al.2021.Semina.Ci.Agrarias-Trigo.Vigor.Sem.x.Dens.Sem..pdf
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Marc: |
LEADER 02431naa a2200265 a 4500
001 2132214
005 2021-12-10
008 2021 bl uuuu u00u1 u #d
100 1 $aMARINHO, J. de L.
245 $aWheat yield and seed physiological quality affected by initial seed vigor, sowing density, and environmental conditions$h[electronic resource]
260 $c2021
520 $aOptimization of seed density range, combined with the use of quality seeds may help generate more profit from wheat production, as these factors affect grain yield and the quality of seeds. The aim of this study was to evaluate the effects of initial vigor level and sowing densities on the productive performance of the plants and the physiological performance of the seeds of two wheat cultivars in two cultivation environments. The experiment was carried out in the cities of Londrina and Ponta Grossa, Paraná, Brazil, in a randomized block design with four replications, following a 2 × 2 × 4 factorial scheme with two levels of seed vigor (high and low), two cultivars (BRS Gralha-Azul and BRS Sabiá), and four sowing densities (150, 250, 350, and 450 seeds m-2). The following characteristics were evaluated: emerged seedlings, shoot dry matter, spike density, vegetation index, and grain yield. Additionally, the physiological potential of the seeds produced in Londrina was evaluated by first germination count, germination, accelerated aging, seedling emergence, and emergence speed index tests. The increase in density up to 450 seeds m-2 favored the productive performance of the crop in both cultivation environments; however, it reduced the physiological performance of the seeds produced in Londrina. The cultivars BRS Gralha-Azul and BRS Sabiá had better performance and grain yield in Londrina and Ponta Grossa, respectively. High-vigor seeds favored the establishment of the stand, especially under unfavorable environmental conditions. Key words: Germination. Plant population. Seed quality. Triticum aestivum L.
650 $aAspecto Fisiológico
650 $aDensidade de Semeadura
650 $aFisiologia
650 $aGrão
650 $aSemeadura
650 $aSemente
650 $aTrigo
700 1 $aSILVA, S. R.
700 1 $aSOUZA, D. N. DE
700 1 $aFONSECA, I. C. DE B.
700 1 $aBAZZO, J. H. B.
700 1 $aZUCARELI, C.
773 $tSêmina: Ciências Agrárias$gv. 42, n. 3, supl. 1, p. 1595-1614, 2021
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Embrapa Trigo (CNPT) |
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