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Registro Completo |
Biblioteca(s): |
Embrapa Milho e Sorgo. |
Data corrente: |
25/08/1997 |
Data da última atualização: |
01/04/2013 |
Autoria: |
PEREIRA FILHO, I. A.; CRUZ, J. C.; RAMALHO, M. A. P. |
Afiliação: |
ISRAEL ALEXANDRE PEREIRA FILHO, CNPMS; JOSE CARLOS CRUZ, CNPMS. |
Título: |
Cultivo de milho precoce em diferentes sistemas de plantio, espaçamento e densidades. |
Ano de publicação: |
1992 |
Fonte/Imprenta: |
In: EMBRAPA. Centro de Nacional de Pesquisa de Milho e Sorgo. Relatório técnico anual do Centro Nacional de Pesquisa de Milho e Sorgo 1988-1991. Sete Lagoas, 1992. p. 183-184. |
Idioma: |
Português |
Palavras-Chave: |
Cultural practices; Densidade; Maize; Sistema de plantio; Spacing. |
Thesagro: |
Espaçamento; Milho; Pratica Cultural; Zea Mays. |
Thesaurus Nal: |
cropping systems; density. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/80135/1/Cultivo-milho.pdf
|
Marc: |
LEADER 00870naa a2200265 a 4500 001 1475888 005 2013-04-01 008 1992 bl uuuu u00u1 u #d 100 1 $aPEREIRA FILHO, I. A. 245 $aCultivo de milho precoce em diferentes sistemas de plantio, espaçamento e densidades.$h[electronic resource] 260 $c1992 650 $acropping systems 650 $adensity 650 $aEspaçamento 650 $aMilho 650 $aPratica Cultural 650 $aZea Mays 653 $aCultural practices 653 $aDensidade 653 $aMaize 653 $aSistema de plantio 653 $aSpacing 700 1 $aCRUZ, J. C. 700 1 $aRAMALHO, M. A. P. 773 $tIn: EMBRAPA. Centro de Nacional de Pesquisa de Milho e Sorgo. Relatório técnico anual do Centro Nacional de Pesquisa de Milho e Sorgo 1988-1991. Sete Lagoas, 1992. p. 183-184.
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Embrapa Milho e Sorgo (CNPMS) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
29/10/2021 |
Data da última atualização: |
29/10/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
DINIZ, J. H. W.; PERES, R. F. G.; TEIXEIRA, A. C. B.; RIVEROS, J. A. N.; NORONHA, I. M.; MARTINS, C. F. G.; OLIVEIRA, C. S.; POHLER, K. G.; PUGLIESI, G.; OLIVEIRA, L. Z. |
Afiliação: |
JULIANA HORTA WILKE DINIZ, Universidade Federal de Minas Gerais; ROGERIO FONSECA GUIMARÃES PERES; ANA CAROLINA BAHIA TEIXEIRA, Universidade Federal de Minas Gerais; JOSE ANDRES NIVIA RIVEROS, Universidade Federal de Minas Gerais; ISABELLA MARCONATO NORONHA; CÍCERO FLEURY GUEDES MARTINS; CLARA SLADE OLIVEIRA, CNPGL; KY GARRETT POHLER, Texas A&M University; GUILHERME PUGLIESI, Universidade de São Paulo; LETICIA ZOCCOLARO OLIVEIRA, Universidade Federal de Minas Gerais. |
Título: |
Administration of PGF2 alpha at the moment of timed-AI using sex-sortedor conventional semen in suckled nelore cows with different intensityof estrus behavior. |
Ano de publicação: |
2021 |
Fonte/Imprenta: |
Theriogenology, v. 74, 169e175, 2021. |
DOI: |
https://doi.org/10.1016/j.theriogenology.2021.08.023 |
Idioma: |
Inglês |
Conteúdo: |
The aim of this work was to evaluate pregnancy rates (PR) and ovulatory characteristics of Nelore cows receiving PGF2a at the time of AI (artificial insemination) in a progesterone(P4)/estradiol-based timed-AI protocol. We also compared the effects of PGF2a treatment at AI in cows inseminated with conventional or sex-sorted semen, with the absence or expression of estrus. In experiment 1, a total of 701 suckled, multiparous Nelore cows from two commercial beef farms were submitted to the same protocol. All cows received a 12.5 mg (IM) injection of dinoprost tromethamine (Dinoprost; Lutalyse®; PGF treatment) at days 7 and 9 of a timed-AI protocol. Following P4 device removal (day 11; D11), AI was performed 48 h later with conventional or sex-sorted semen from two different sires. At AI, cows received an additional dose of 12.5 mg (IM) of Dinoprost (PGF treatment) or 2.5 mL (IM) of sterile saline (Control). Estrus behavior was determined at D11 by activation of an estrus detection device (Estrotect®). The overall PR was 32.8% (n ¼ 348) at Farm 1 and 42.3% (n ¼ 353) at Farm 2 (P ¼ 0.01). Despite PR differences between farms, the same factors affected PR at Farms 1 and 2. Body condition score (P ¼ 0.02), estrus behavior (P ¼ 0.01), and type of semen (P < 0.001) were factors affecting PR. Conventional semen had a 2.73x greater chance of successful pregnancy than sex-sorted semen. Cows displaying estrus had a 2.5x greater chance of successful pregnancy than cows that did not display estrus. No treatment effect (P ¼ 0.67) was detected in cows receiving conventional or sex-sorted semen. However, there was a tendency (P ¼ 0.08) for an interaction between treatment (PGF or control) and estrus behavior (estrus or no estrus). PGF2a at the time of AI tended to increase PR of cows that did not display estrus (P < 0.10). In experiment 2, 29 suckled, multiparous Nelore cows were compared using B-mode and Doppler ultrasongraphy to assess the ovulatory characteristics of cows receiving the 12.5 mg (IM) injection of Dinoprost (PGF treatment) or saline solution (control) at D11. No significant effects of PGF2a treatment at D11 were observed in follicular characteristics and/or ovulation performance. It was concluded that fertility of sex-sorted semen was lower than conventional semen, regardless of the PGF2a treatment. The 12.5 mg treatment of Dinoprost at AI did not accelerate the occurrence of ovulation; however, it was interesting to note that PGF2a treatment at timed-AI appeared to increase the fertility of cows that did not display estrus, independent of semen type. MenosThe aim of this work was to evaluate pregnancy rates (PR) and ovulatory characteristics of Nelore cows receiving PGF2a at the time of AI (artificial insemination) in a progesterone(P4)/estradiol-based timed-AI protocol. We also compared the effects of PGF2a treatment at AI in cows inseminated with conventional or sex-sorted semen, with the absence or expression of estrus. In experiment 1, a total of 701 suckled, multiparous Nelore cows from two commercial beef farms were submitted to the same protocol. All cows received a 12.5 mg (IM) injection of dinoprost tromethamine (Dinoprost; Lutalyse®; PGF treatment) at days 7 and 9 of a timed-AI protocol. Following P4 device removal (day 11; D11), AI was performed 48 h later with conventional or sex-sorted semen from two different sires. At AI, cows received an additional dose of 12.5 mg (IM) of Dinoprost (PGF treatment) or 2.5 mL (IM) of sterile saline (Control). Estrus behavior was determined at D11 by activation of an estrus detection device (Estrotect®). The overall PR was 32.8% (n ¼ 348) at Farm 1 and 42.3% (n ¼ 353) at Farm 2 (P ¼ 0.01). Despite PR differences between farms, the same factors affected PR at Farms 1 and 2. Body condition score (P ¼ 0.02), estrus behavior (P ¼ 0.01), and type of semen (P < 0.001) were factors affecting PR. Conventional semen had a 2.73x greater chance of successful pregnancy than sex-sorted semen. Cows displaying estrus had a 2.5x greater chance of successful pregnancy than cows that did not displ... Mostrar Tudo |
Palavras-Chave: |
Dinoprost; Estrus behavior; ProstaglandinF2alpha; Sexed semen; Timed-AI. |
Thesagro: |
Bovino; Inseminação Artificial; Prenhez; Reprodução Animal; Vaca. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 03711naa a2200361 a 4500 001 2135711 005 2021-10-29 008 2021 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.theriogenology.2021.08.023$2DOI 100 1 $aDINIZ, J. H. W. 245 $aAdministration of PGF2 alpha at the moment of timed-AI using sex-sortedor conventional semen in suckled nelore cows with different intensityof estrus behavior.$h[electronic resource] 260 $c2021 520 $aThe aim of this work was to evaluate pregnancy rates (PR) and ovulatory characteristics of Nelore cows receiving PGF2a at the time of AI (artificial insemination) in a progesterone(P4)/estradiol-based timed-AI protocol. We also compared the effects of PGF2a treatment at AI in cows inseminated with conventional or sex-sorted semen, with the absence or expression of estrus. In experiment 1, a total of 701 suckled, multiparous Nelore cows from two commercial beef farms were submitted to the same protocol. All cows received a 12.5 mg (IM) injection of dinoprost tromethamine (Dinoprost; Lutalyse®; PGF treatment) at days 7 and 9 of a timed-AI protocol. Following P4 device removal (day 11; D11), AI was performed 48 h later with conventional or sex-sorted semen from two different sires. At AI, cows received an additional dose of 12.5 mg (IM) of Dinoprost (PGF treatment) or 2.5 mL (IM) of sterile saline (Control). Estrus behavior was determined at D11 by activation of an estrus detection device (Estrotect®). The overall PR was 32.8% (n ¼ 348) at Farm 1 and 42.3% (n ¼ 353) at Farm 2 (P ¼ 0.01). Despite PR differences between farms, the same factors affected PR at Farms 1 and 2. Body condition score (P ¼ 0.02), estrus behavior (P ¼ 0.01), and type of semen (P < 0.001) were factors affecting PR. Conventional semen had a 2.73x greater chance of successful pregnancy than sex-sorted semen. Cows displaying estrus had a 2.5x greater chance of successful pregnancy than cows that did not display estrus. No treatment effect (P ¼ 0.67) was detected in cows receiving conventional or sex-sorted semen. However, there was a tendency (P ¼ 0.08) for an interaction between treatment (PGF or control) and estrus behavior (estrus or no estrus). PGF2a at the time of AI tended to increase PR of cows that did not display estrus (P < 0.10). In experiment 2, 29 suckled, multiparous Nelore cows were compared using B-mode and Doppler ultrasongraphy to assess the ovulatory characteristics of cows receiving the 12.5 mg (IM) injection of Dinoprost (PGF treatment) or saline solution (control) at D11. No significant effects of PGF2a treatment at D11 were observed in follicular characteristics and/or ovulation performance. It was concluded that fertility of sex-sorted semen was lower than conventional semen, regardless of the PGF2a treatment. The 12.5 mg treatment of Dinoprost at AI did not accelerate the occurrence of ovulation; however, it was interesting to note that PGF2a treatment at timed-AI appeared to increase the fertility of cows that did not display estrus, independent of semen type. 650 $aBovino 650 $aInseminação Artificial 650 $aPrenhez 650 $aReprodução Animal 650 $aVaca 653 $aDinoprost 653 $aEstrus behavior 653 $aProstaglandinF2alpha 653 $aSexed semen 653 $aTimed-AI 700 1 $aPERES, R. F. G. 700 1 $aTEIXEIRA, A. C. B. 700 1 $aRIVEROS, J. A. N. 700 1 $aNORONHA, I. M. 700 1 $aMARTINS, C. F. G. 700 1 $aOLIVEIRA, C. S. 700 1 $aPOHLER, K. G. 700 1 $aPUGLIESI, G. 700 1 $aOLIVEIRA, L. Z. 773 $tTheriogenology$gv. 74, 169e175, 2021.
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