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Registro Completo |
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
12/03/1998 |
Data da última atualização: |
12/03/1998 |
Autoria: |
REATTO, A.; CORREIA, J. R.; SPERA, S. T. |
Título: |
Solos do bioma cerrado: aspectos pedologicos. |
Ano de publicação: |
1998 |
Fonte/Imprenta: |
In: SANO, S.M.; ALMEIDA, S.P. de, ed. Cerrado: ambiente e flora. Planaltina: EMBRAPA-CPAC, 1998. |
Páginas: |
p.47-86. |
Descrição Física: |
16 figuras. |
Idioma: |
Português |
Conteúdo: |
Caracteristicas empregadas para distincao de classes de solos; Caracteristicas morfologicas e fisicas; Caracteristicas quimicas; Caracteristicas auxiliares; Principais classes de solos do bioma cerrado: latossolos, areias quartzosas, podzolicos, terra roxa estruturada, cambissolos, plintossolos, solos litolicos e litossolos, hidromorfico cinzento, glei pouco humico e glei humico. |
Palavras-Chave: |
Brasil; Soil sciences. |
Thesagro: |
Cerrado; Pedologia; Solo. |
Thesaurus Nal: |
Brazil; soil. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01010naa a2200241 a 4500 001 1554093 005 1998-03-12 008 1998 bl uuuu u00u1 u #d 100 1 $aREATTO, A. 245 $aSolos do bioma cerrado$baspectos pedologicos. 260 $c1998 300 $ap.47-86.$c16 figuras. 520 $aCaracteristicas empregadas para distincao de classes de solos; Caracteristicas morfologicas e fisicas; Caracteristicas quimicas; Caracteristicas auxiliares; Principais classes de solos do bioma cerrado: latossolos, areias quartzosas, podzolicos, terra roxa estruturada, cambissolos, plintossolos, solos litolicos e litossolos, hidromorfico cinzento, glei pouco humico e glei humico. 650 $aBrazil 650 $asoil 650 $aCerrado 650 $aPedologia 650 $aSolo 653 $aBrasil 653 $aSoil sciences 700 1 $aCORREIA, J. R. 700 1 $aSPERA, S. T. 773 $tIn: SANO, S.M.; ALMEIDA, S.P. de, ed. Cerrado: ambiente e flora. Planaltina: EMBRAPA-CPAC, 1998.
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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
Data corrente: |
04/01/2010 |
Data da última atualização: |
14/03/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
MACHADO, R.; BERGAMASCHI, M. A. C. M.; BARBOSA, R. T.; OLIVEIRA, C. A. de; BINELLI, M. |
Afiliação: |
RUI MACHADO, CPPSE; MARCO AURELIO C MEIRA BERGAMASCHI, CPPSE; ROGERIO TAVEIRA BARBOSA, CPPSE; C. A. DE OLIVEIRA, FMVZ-USP - SÃO PAULO; M. BINELLI, FMVZ - USP - SÃO PAULO. |
Título: |
Ovarian function in Nelore (Bos taurus indicus) cows after post-ovulation hormonal treatments. |
Ano de publicação: |
2008 |
Fonte/Imprenta: |
Theriogenology, v. 69, n. 7, p. 798-804, apr. 2008. |
DOI: |
10.1016/j.theriogenology.2007.10.025 |
Idioma: |
Inglês |
Conteúdo: |
Maternal recognition of pregnancy in the cow requires successful signaling by the conceptus to block luteolysis. Conceptus growth and function depend on an optimal uterine environment, regulated by luteal progesterone. The objective of this study was to test strategies to optimize luteal function, as well as prevent a dominant follicle from initiating luteolysis. Nelore (Bos taurus indicus) beef cows (n = 40) were submitted to a GnRH/PGF2?/GnRH protocol. Cows that ovulated from a dominant ovarian follicle (ovulation = Day 0) were allocated to receive: no additional treatment (GC; n = 7); 3000 IU of hCG on Day 5 (GhCG; n = 5); 5 mg of estradiol-17? on Day 12 (GE2; n = 6); or 3000 IU of hCG on Day 5 and 5 mg of estradiol-17? on Day 12 (GhCG/E2; n = 5). Ultrasonographic imaging of the ovaries, assessment of plasma progesterone concentration, and detection of estrus were done daily from Day 5 to the day of subsequent ovulation. Treatment with hCG induced an accessory CL, increased CL volume, and plasma progesterone concentration throughout the luteal phase (P < 0.01). Estradiol-17? induced atresia and recruitment of a new wave of follicular growth; it eliminated a potentially estrogen-active, growing ovarian follicle within the critical period for maternal recognition of pregnancy, but it also hastened luteolysis (Days 16 or 17 vs. Days 18 or 19 in non-treated cows). In conclusion, the approaches tested enhanced luteal function (hCG) and altered ovarian follicular dynamics (estradiol-17?), but were unable to extend the life-span of the CL in Nelore cows. MenosMaternal recognition of pregnancy in the cow requires successful signaling by the conceptus to block luteolysis. Conceptus growth and function depend on an optimal uterine environment, regulated by luteal progesterone. The objective of this study was to test strategies to optimize luteal function, as well as prevent a dominant follicle from initiating luteolysis. Nelore (Bos taurus indicus) beef cows (n = 40) were submitted to a GnRH/PGF2?/GnRH protocol. Cows that ovulated from a dominant ovarian follicle (ovulation = Day 0) were allocated to receive: no additional treatment (GC; n = 7); 3000 IU of hCG on Day 5 (GhCG; n = 5); 5 mg of estradiol-17? on Day 12 (GE2; n = 6); or 3000 IU of hCG on Day 5 and 5 mg of estradiol-17? on Day 12 (GhCG/E2; n = 5). Ultrasonographic imaging of the ovaries, assessment of plasma progesterone concentration, and detection of estrus were done daily from Day 5 to the day of subsequent ovulation. Treatment with hCG induced an accessory CL, increased CL volume, and plasma progesterone concentration throughout the luteal phase (P < 0.01). Estradiol-17? induced atresia and recruitment of a new wave of follicular growth; it eliminated a potentially estrogen-active, growing ovarian follicle within the critical period for maternal recognition of pregnancy, but it also hastened luteolysis (Days 16 or 17 vs. Days 18 or 19 in non-treated cows). In conclusion, the approaches tested enhanced luteal function (hCG) and altered ovarian follicular dynamics (estr... Mostrar Tudo |
Palavras-Chave: |
Antiluteolytic strategies; Ovary. |
Thesagro: |
Estradiol. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 02251naa a2200217 a 4500 001 1579307 005 2023-03-14 008 2008 bl uuuu u00u1 u #d 024 7 $a10.1016/j.theriogenology.2007.10.025$2DOI 100 1 $aMACHADO, R. 245 $aOvarian function in Nelore (Bos taurus indicus) cows after post-ovulation hormonal treatments.$h[electronic resource] 260 $c2008 520 $aMaternal recognition of pregnancy in the cow requires successful signaling by the conceptus to block luteolysis. Conceptus growth and function depend on an optimal uterine environment, regulated by luteal progesterone. The objective of this study was to test strategies to optimize luteal function, as well as prevent a dominant follicle from initiating luteolysis. Nelore (Bos taurus indicus) beef cows (n = 40) were submitted to a GnRH/PGF2?/GnRH protocol. Cows that ovulated from a dominant ovarian follicle (ovulation = Day 0) were allocated to receive: no additional treatment (GC; n = 7); 3000 IU of hCG on Day 5 (GhCG; n = 5); 5 mg of estradiol-17? on Day 12 (GE2; n = 6); or 3000 IU of hCG on Day 5 and 5 mg of estradiol-17? on Day 12 (GhCG/E2; n = 5). Ultrasonographic imaging of the ovaries, assessment of plasma progesterone concentration, and detection of estrus were done daily from Day 5 to the day of subsequent ovulation. Treatment with hCG induced an accessory CL, increased CL volume, and plasma progesterone concentration throughout the luteal phase (P < 0.01). Estradiol-17? induced atresia and recruitment of a new wave of follicular growth; it eliminated a potentially estrogen-active, growing ovarian follicle within the critical period for maternal recognition of pregnancy, but it also hastened luteolysis (Days 16 or 17 vs. Days 18 or 19 in non-treated cows). In conclusion, the approaches tested enhanced luteal function (hCG) and altered ovarian follicular dynamics (estradiol-17?), but were unable to extend the life-span of the CL in Nelore cows. 650 $aEstradiol 653 $aAntiluteolytic strategies 653 $aOvary 700 1 $aBERGAMASCHI, M. A. C. M. 700 1 $aBARBOSA, R. T. 700 1 $aOLIVEIRA, C. A. de 700 1 $aBINELLI, M. 773 $tTheriogenology$gv. 69, n. 7, p. 798-804, apr. 2008.
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