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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
19/08/2009 |
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Data da última atualização: |
02/08/2013 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FARIA, C. U. de; MAGNABOSCO, C. de U.; ALBUQUERQUE, L. G. de; REYES, A. de los; BEZERRA, L. A. F.; LÔBO, R. B. |
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Afiliação: |
Carina Ubirajara de Faria; Cláudio de Ulhôa Magnabosco, CPAC; Lúcia Galvão de Albuquerque, UNESP; Arcadio de los Reys, UFG; Luiz Antônio Framartino Bezerra, USP; Raysildo Barbosa Lôbo, USP. |
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Título: |
Análise bayesiana na estimação de correlações genéticas entre escores visuais e características reprodutivas de bovinos da raça Nelore utilizando modelo animal linear-limiar. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Arquivo Brasileiro de Medicina Veterinária e Zootecnia, Belo Horizonte, v. 61, n. 4, p. 949-958, 2009. |
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Idioma: |
Português |
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Conteúdo: |
Estimaram- se as correlações genéticas entre os escores visuais e as características reprodutivas, utlizando a estatística bayesiana sob modelo animal linear-limiar, em bovinos da raça Nelore. Foram estudadas características categóricas morfológicas, avaliadas visualmente aos oito, 15 e 22 meses de idade; e características contínuas de perímetro escrotal padronizado aos 365 e 450 dias de idade, além da idade ao primeiro parto. As estimativas de correlações genéticas foram de sentido favorável à seleção, apresentando magnitudes moderadas, sugerindo que a seleção de animais para um biótipo desejável pode levar a animais com maior fertilidade e precocidade sexual. As estimativas de correlação genética ara o perímetro escrotal padronizado aos 450 dias e a idade ao primeiro parto com as características morfológicas avaliadas aos 22 meses de idade foram maiores do que as obtidas entre as características de escores visuais avaliadas aos oito e 15 meses de idade. A utilização de escores visuais como critério de seleção trará progresso genético também para as características reprodutivas. |
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Palavras-Chave: |
Genetic parameter. |
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Thesagro: |
Gado de Corte; Genética Animal; Parâmetro Genético; Reprodução. |
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Thesaurus Nal: |
animal genetics; animal reproduction; beef cattle. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/86942/1/faria-cude-02-2009.pdf
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Marc: |
LEADER 02076naa a2200277 a 4500
001 1572241
005 2013-08-02
008 2009 bl uuuu u00u1 u #d
100 1 $aFARIA, C. U. de
245 $aAnálise bayesiana na estimação de correlações genéticas entre escores visuais e características reprodutivas de bovinos da raça Nelore utilizando modelo animal linear-limiar.
260 $c2009
520 $aEstimaram- se as correlações genéticas entre os escores visuais e as características reprodutivas, utlizando a estatística bayesiana sob modelo animal linear-limiar, em bovinos da raça Nelore. Foram estudadas características categóricas morfológicas, avaliadas visualmente aos oito, 15 e 22 meses de idade; e características contínuas de perímetro escrotal padronizado aos 365 e 450 dias de idade, além da idade ao primeiro parto. As estimativas de correlações genéticas foram de sentido favorável à seleção, apresentando magnitudes moderadas, sugerindo que a seleção de animais para um biótipo desejável pode levar a animais com maior fertilidade e precocidade sexual. As estimativas de correlação genética ara o perímetro escrotal padronizado aos 450 dias e a idade ao primeiro parto com as características morfológicas avaliadas aos 22 meses de idade foram maiores do que as obtidas entre as características de escores visuais avaliadas aos oito e 15 meses de idade. A utilização de escores visuais como critério de seleção trará progresso genético também para as características reprodutivas.
650 $aanimal genetics
650 $aanimal reproduction
650 $abeef cattle
650 $aGado de Corte
650 $aGenética Animal
650 $aParâmetro Genético
650 $aReprodução
653 $aGenetic parameter
700 1 $aMAGNABOSCO, C. de U.
700 1 $aALBUQUERQUE, L. G. de
700 1 $aREYES, A. de los
700 1 $aBEZERRA, L. A. F.
700 1 $aLÔBO, R. B
773 $tArquivo Brasileiro de Medicina Veterinária e Zootecnia, Belo Horizonte$gv. 61, n. 4, p. 949-958, 2009.
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Embrapa Cerrados (CPAC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
26/05/2022 |
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Data da última atualização: |
26/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
OLIVEIRA, L. E. Z. de; NUNES, R. de S.; FIGUEIREDO, C. C. de; REIN, T. A. |
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Afiliação: |
LUIZ EDUARDO ZANCANARO DE OLIVEIRA; RAFAEL DE SOUZA NUNES, CPAC; CÍCERO CÉLIO DE FIGUEIREDO; THOMAZ ADOLPHO REIN, CPAC. |
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Título: |
Spatial distribution of soil phosphorus fractions in a clayey Oxisol submitted to long-term phosphate fertilization strategies. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Geoderma, v. 418, 115847, 2022. |
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Idioma: |
Inglês |
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Conteúdo: |
Due to the strong interaction of phosphorus (P) with soil constituents, P fertilizer placement can significantly affect how crops take up this nutrient. Nonetheless, few studies address the spatial distribution of P at the rowinterrow scale according to management strategies. In a 16-yr no-tillage (NT) field experiment involving two different P fertilizer application methods (broadcast or band application) and two P sources (triple superphosphate ? TSP or reactive Gafsa phosphate rock-RPR), plus a control treatment, the spatial distribution of P fractions was assessed in two occasions: after the 8th and the 16th crops. This was done vertically to a depth of 30 cm and horizontally from the crop row to the center of the interrows. Broadcast treatments showed total and Mehlich-1 P accumulation at the soil surface while for band application this accumulation was in the crop row region. A small P movement down the soil profile was observed from the 8th to the 16th crop with broadcast application, whereas with band fertilizer this effect was more noticeable, showing increased soil volume under P fertilizer influence even without soil tillage; it is likely that this was partly due to biological P turnover and application at depth. After 16 crops, the soil volume under the influence of P fertilizer was greater under band application while the volume above Mehlich-1 P critical levels for the 0?20 cm layer in regional studies was higher under broadcast application, independent of the P source. Soil organic carbon (SOC) contents were not affected by P placement or source. However, a significant accumulation of SOC was seen from the soil surface downwards after the last eight crops. The spatial distribution of P and SOC was better correlated under broadcast treatments, with high values for both variables at the soil surface; this may explain similar yields to those obtained with band application, where P fertilizer is placed near the main roots in an attempt to reduce P adsorption to the soil solid phase MenosDue to the strong interaction of phosphorus (P) with soil constituents, P fertilizer placement can significantly affect how crops take up this nutrient. Nonetheless, few studies address the spatial distribution of P at the rowinterrow scale according to management strategies. In a 16-yr no-tillage (NT) field experiment involving two different P fertilizer application methods (broadcast or band application) and two P sources (triple superphosphate ? TSP or reactive Gafsa phosphate rock-RPR), plus a control treatment, the spatial distribution of P fractions was assessed in two occasions: after the 8th and the 16th crops. This was done vertically to a depth of 30 cm and horizontally from the crop row to the center of the interrows. Broadcast treatments showed total and Mehlich-1 P accumulation at the soil surface while for band application this accumulation was in the crop row region. A small P movement down the soil profile was observed from the 8th to the 16th crop with broadcast application, whereas with band fertilizer this effect was more noticeable, showing increased soil volume under P fertilizer influence even without soil tillage; it is likely that this was partly due to biological P turnover and application at depth. After 16 crops, the soil volume under the influence of P fertilizer was greater under band application while the volume above Mehlich-1 P critical levels for the 0?20 cm layer in regional studies was higher under broadcast application, independent of the ... Mostrar Tudo |
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Thesagro: |
Fósforo; Plantio Direto; Solo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02614naa a2200193 a 4500
001 2143493
005 2022-05-26
008 2022 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, L. E. Z. de
245 $aSpatial distribution of soil phosphorus fractions in a clayey Oxisol submitted to long-term phosphate fertilization strategies.$h[electronic resource]
260 $c2022
520 $aDue to the strong interaction of phosphorus (P) with soil constituents, P fertilizer placement can significantly affect how crops take up this nutrient. Nonetheless, few studies address the spatial distribution of P at the rowinterrow scale according to management strategies. In a 16-yr no-tillage (NT) field experiment involving two different P fertilizer application methods (broadcast or band application) and two P sources (triple superphosphate ? TSP or reactive Gafsa phosphate rock-RPR), plus a control treatment, the spatial distribution of P fractions was assessed in two occasions: after the 8th and the 16th crops. This was done vertically to a depth of 30 cm and horizontally from the crop row to the center of the interrows. Broadcast treatments showed total and Mehlich-1 P accumulation at the soil surface while for band application this accumulation was in the crop row region. A small P movement down the soil profile was observed from the 8th to the 16th crop with broadcast application, whereas with band fertilizer this effect was more noticeable, showing increased soil volume under P fertilizer influence even without soil tillage; it is likely that this was partly due to biological P turnover and application at depth. After 16 crops, the soil volume under the influence of P fertilizer was greater under band application while the volume above Mehlich-1 P critical levels for the 0?20 cm layer in regional studies was higher under broadcast application, independent of the P source. Soil organic carbon (SOC) contents were not affected by P placement or source. However, a significant accumulation of SOC was seen from the soil surface downwards after the last eight crops. The spatial distribution of P and SOC was better correlated under broadcast treatments, with high values for both variables at the soil surface; this may explain similar yields to those obtained with band application, where P fertilizer is placed near the main roots in an attempt to reduce P adsorption to the soil solid phase
650 $aFósforo
650 $aPlantio Direto
650 $aSolo
700 1 $aNUNES, R. de S.
700 1 $aFIGUEIREDO, C. C. de
700 1 $aREIN, T. A.
773 $tGeoderma$gv. 418, 115847, 2022.
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