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 | Acesso ao texto completo restrito à biblioteca da Embrapa Rondônia. Para informações adicionais entre em contato com cpafro.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Rondônia. |
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Data corrente: |
31/01/2022 |
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Data da última atualização: |
31/01/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BARBOSA, I. P.; CESTARO, J. P.; SILVA, S. A.; NOLETO, G. S.; GONÇALVES, R. L.; SILVA, G. M.; PAES, F. H.; GASPERIN, B. G.; ROVANI, M. T.; PFEIFER, L. F. M. |
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Afiliação: |
INGRID P. BARBOSA, Universidade Federal do Acre (Ufac); JAMYLE P. CESTARO, Universidade Federal do Acre (Ufac); SAMIRA A. SILVA, Centro Universitario Aparício Carvalho (FIMCA); GABRIELLY S. NOLETO, Centro Universitario Aparício Carvalho (FIMCA); REUEL L. GONÇALVES, Biogênesis Bago Saúde Animal, Curitiba, PR; GEORGE M. SILVA, Universidade Federal de Rondonia (UNIR); FELIPE H. PAES, Centro Universitario Aparício Carvalho (FIMCA); BERNARDO G. GASPERIN, Universidade Federal de Pelotas (Ufpel); MONIQUE T. ROVANI, Universidade Federal do Rio Grande do Sul (UFRGS); LUIZ FRANCISCO MACHADO PFEIFER, CPAF-RO. |
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Título: |
GnRH34: an alternative for increasing pregnancy in timed AI beef cows. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Theriogenology, v. 179, p. 1-254, Feb. 2022. |
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ISSN: |
0093-691X |
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DOI: |
https://doi.org/10.1016/j.theriogenology.2021.11.014 |
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Idioma: |
Inglês |
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Conteúdo: |
Two experiments evaluated the effects of gonadotropin releasing hormone (GnRH) treatment on fertility of suckled Nelore beef cows treated with an estradiol/progesterone (P4)-based protocol for timed artificial insemination (TAI). Experiment 1 was designed to determine the effect of GnRH administered 34 h after P4 insert removal (GnRH34) on time of ovulation. Suckled cows (n = 34) were treated with 2 mg estradiol benzoate (EB) and an intravaginal insert containing 1.9 g of P4. Eight days later, P4 inserts were removed, and all cows received 150 ug of d-cloprostenol (prostaglandin F2 alpha analogue), 300 IU of eCG, and 1 mg of estradiol cypionate (ECP). On Day 9 (05:00 p.m.), cows were randomly distributed, according to the diameter of the pre-ovulatory follicle, in two treatments: 1) GnRH (n = 17) cows that received 10.5 ug of buserelin acetate, or 2) no further treatment (control, n = 17). Cows treated with GnRH 34 h after P4 insert removal ovulated earlier (P = 0.02) than control cows (66 ± 0.0 and 77.2 ± 4.3 h). Experiment 2 was designed to determine the effect of GnRH34 on the fertility of suckled beef cows. Nelore cows (n = 506) were treated as Experiment 1. On Day 8, cows were painted in the sacrocaudal region to identify cows that displayed estrus. On Day 9 (05:00 p.m.), cows were randomized to receive same treatment as Experiment 1, control (n = 252), or GnRH (n = 254). All cows were TAI 48 h after P4 insert removal. At TAI, estrus was evaluated, and deemed to have occurred in cows without a tail-head chalk mark (>75% paint loss). Cows treated with GnRH 34 h after P4 insert removal had greater (P = 0.01) pregnancy per AI (P/AI) than cows that only received ECP (63.0% and 50.4%). No difference (P = 0.5) was observed in the proportion of cows that displayed estrus between treatments. Furthermore, cows that displayed estrus had greater (P < 0.01) P/AI than cows that did not. Treatment with GnRH, given at 34 h after P4 insert removal, increased (P < 0.05) P/AI in cows that did not show estrus at TAI. In summary, treatment with GnRH 34 h after P4 insert removal was associated with earlier ovulation and resulted in greater P/AI in suckled Nelore cows treated with an estradiol/P4-based protocol for TAI. MenosTwo experiments evaluated the effects of gonadotropin releasing hormone (GnRH) treatment on fertility of suckled Nelore beef cows treated with an estradiol/progesterone (P4)-based protocol for timed artificial insemination (TAI). Experiment 1 was designed to determine the effect of GnRH administered 34 h after P4 insert removal (GnRH34) on time of ovulation. Suckled cows (n = 34) were treated with 2 mg estradiol benzoate (EB) and an intravaginal insert containing 1.9 g of P4. Eight days later, P4 inserts were removed, and all cows received 150 ug of d-cloprostenol (prostaglandin F2 alpha analogue), 300 IU of eCG, and 1 mg of estradiol cypionate (ECP). On Day 9 (05:00 p.m.), cows were randomly distributed, according to the diameter of the pre-ovulatory follicle, in two treatments: 1) GnRH (n = 17) cows that received 10.5 ug of buserelin acetate, or 2) no further treatment (control, n = 17). Cows treated with GnRH 34 h after P4 insert removal ovulated earlier (P = 0.02) than control cows (66 ± 0.0 and 77.2 ± 4.3 h). Experiment 2 was designed to determine the effect of GnRH34 on the fertility of suckled beef cows. Nelore cows (n = 506) were treated as Experiment 1. On Day 8, cows were painted in the sacrocaudal region to identify cows that displayed estrus. On Day 9 (05:00 p.m.), cows were randomized to receive same treatment as Experiment 1, control (n = 252), or GnRH (n = 254). All cows were TAI 48 h after P4 insert removal. At TAI, estrus was evaluated, and deemed to have oc... Mostrar Tudo |
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Palavras-Chave: |
Gonadotropina. |
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Thesagro: |
Fertilidade Animal; Gado de Corte; Gado Nelore; Hormônio; Inseminação Artificial; Ovulação; Reprodução Animal; Vaca de Corte. |
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Thesaurus Nal: |
Animal fertility; Animal reproduction; Artificial insemination; Beef cattle; Beef cows; Gonadotropin-releasing hormone; Nellore; Ovulation. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03532naa a2200457 a 4500
001 2139488
005 2022-01-31
008 2022 bl uuuu u00u1 u #d
022 $a0093-691X
024 7 $ahttps://doi.org/10.1016/j.theriogenology.2021.11.014$2DOI
100 1 $aBARBOSA, I. P.
245 $aGnRH34$ban alternative for increasing pregnancy in timed AI beef cows.$h[electronic resource]
260 $c2022
520 $aTwo experiments evaluated the effects of gonadotropin releasing hormone (GnRH) treatment on fertility of suckled Nelore beef cows treated with an estradiol/progesterone (P4)-based protocol for timed artificial insemination (TAI). Experiment 1 was designed to determine the effect of GnRH administered 34 h after P4 insert removal (GnRH34) on time of ovulation. Suckled cows (n = 34) were treated with 2 mg estradiol benzoate (EB) and an intravaginal insert containing 1.9 g of P4. Eight days later, P4 inserts were removed, and all cows received 150 ug of d-cloprostenol (prostaglandin F2 alpha analogue), 300 IU of eCG, and 1 mg of estradiol cypionate (ECP). On Day 9 (05:00 p.m.), cows were randomly distributed, according to the diameter of the pre-ovulatory follicle, in two treatments: 1) GnRH (n = 17) cows that received 10.5 ug of buserelin acetate, or 2) no further treatment (control, n = 17). Cows treated with GnRH 34 h after P4 insert removal ovulated earlier (P = 0.02) than control cows (66 ± 0.0 and 77.2 ± 4.3 h). Experiment 2 was designed to determine the effect of GnRH34 on the fertility of suckled beef cows. Nelore cows (n = 506) were treated as Experiment 1. On Day 8, cows were painted in the sacrocaudal region to identify cows that displayed estrus. On Day 9 (05:00 p.m.), cows were randomized to receive same treatment as Experiment 1, control (n = 252), or GnRH (n = 254). All cows were TAI 48 h after P4 insert removal. At TAI, estrus was evaluated, and deemed to have occurred in cows without a tail-head chalk mark (>75% paint loss). Cows treated with GnRH 34 h after P4 insert removal had greater (P = 0.01) pregnancy per AI (P/AI) than cows that only received ECP (63.0% and 50.4%). No difference (P = 0.5) was observed in the proportion of cows that displayed estrus between treatments. Furthermore, cows that displayed estrus had greater (P < 0.01) P/AI than cows that did not. Treatment with GnRH, given at 34 h after P4 insert removal, increased (P < 0.05) P/AI in cows that did not show estrus at TAI. In summary, treatment with GnRH 34 h after P4 insert removal was associated with earlier ovulation and resulted in greater P/AI in suckled Nelore cows treated with an estradiol/P4-based protocol for TAI.
650 $aAnimal fertility
650 $aAnimal reproduction
650 $aArtificial insemination
650 $aBeef cattle
650 $aBeef cows
650 $aGonadotropin-releasing hormone
650 $aNellore
650 $aOvulation
650 $aFertilidade Animal
650 $aGado de Corte
650 $aGado Nelore
650 $aHormônio
650 $aInseminação Artificial
650 $aOvulação
650 $aReprodução Animal
650 $aVaca de Corte
653 $aGonadotropina
700 1 $aCESTARO, J. P.
700 1 $aSILVA, S. A.
700 1 $aNOLETO, G. S.
700 1 $aGONÇALVES, R. L.
700 1 $aSILVA, G. M.
700 1 $aPAES, F. H.
700 1 $aGASPERIN, B. G.
700 1 $aROVANI, M. T.
700 1 $aPFEIFER, L. F. M.
773 $tTheriogenology$gv. 179, p. 1-254, Feb. 2022.
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Embrapa Rondônia (CPAF-RO) |
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Biblioteca(s): |
Embrapa Agrossilvipastoril. |
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Data corrente: |
06/12/2021 |
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Data da última atualização: |
06/12/2021 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
MATOS, B. F. de; ARAÚJO, G. P. de; BEHLING NETO, A.; WRUCK, F. J.; OLIVEIRA JUNIOR, O. L. de; PEDREIRA, B. C. e. |
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Afiliação: |
BETANIA FLORENCIO DE MATOS, UFMT, Sinop-MT; GRAZIELA PAULA DE ARAÚJO, UFMT, Sinop-MT; ARTHUR BEHLING NETO, UFMT, Sinop-MT; FLAVIO JESUS WRUCK, CPAMT; ORLANDO LUCIO DE OLIVEIRA JUNIOR, CPAMT; BRUNO CARNEIRO E PEDREIRA, CPAMT. |
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Título: |
The effect of the harvesting frequency on the residual forage mass in mixed pastures. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 56., 2021, Florianópolis. Animal science: challenges in production and sustainability: proceedings... Brasília, DF: Sociedade Brasileira de Zootecnia, 2021. p. 108. |
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Idioma: |
Inglês |
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Notas: |
Evento virtual. |
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Conteúdo: |
The use of different forage species in a mixed pasture is recommended to improve forage mass and soil characteristics. However, the frequency of harvest (e.g.; grazing or hay) can increase the forage removal during the off-season, and affect the residual forage mass to the following crop, especially in the non-till crop-livestock systems. We aimed to assess the harvest frequency effect in a mixed pasture compounded by Urochloa ruziziensis, pigeon pea (Cajanus cajan ?Super N?); Sunflower (Helianthus annuus), and Buckwheat (Fagopyrum esculentum) on the residual forage mass at the Embrapa Agrossilvipastoril, in Sinop, MT, Brazil. The mixed were planted on March 10, 2020, after the soybean harvest. The experimental design was a randomized complete block design with three replicates. The treatments were four harvest frequencies. The harvesting frequencies were: Straw ? no-harvest during the off-season; Lax - with one harvest (at 115 days after planting); Moderate - two harvests (80 and 115 days after planting); and Heavy - three harvests (45, 80, and 115 days after The plots were harvested at 20-cm stubble height and there were not fertilized. On September 30, 2020, forage mass was harvested using three quadrats (0.5 m2) per plot, at soil level, to calculate residual forage mass, which was desiccated (4 L ha-1 of glyphosate) on October 23, 2020. The soybean (BG4781, Brevant) was seeded on November 07, when 88 kg of P2O5 was applied. On December 01, 68 kg of K surface-applied. The crop management practices (e.g.; herbicide, insecticide, and fungicide) were similar to all plots, and on March 09, 2021, the soybean was harvested (data not showed). The residual forage mass was affected by the harvesting frequency (P=0.0296). The greatest residual forage mass was measured in the treatment where there was no harvesting (straw), on average 5625 kg DM ha-1. On the other hand, lax, moderate and heavy treatments presented similar residual forage mass (on average, 3000 kg DM ha-1). We concluded that although the residual forage mass was reduced when the off-season pastures were harvested, the number of harvest events did not affect the forage mass left on the field to assure the non-till cropping system. It is important to mention the soybean grain yield needs to be measured in the following crop season to understand the effect of the harvesting frequency during the off-season. MenosThe use of different forage species in a mixed pasture is recommended to improve forage mass and soil characteristics. However, the frequency of harvest (e.g.; grazing or hay) can increase the forage removal during the off-season, and affect the residual forage mass to the following crop, especially in the non-till crop-livestock systems. We aimed to assess the harvest frequency effect in a mixed pasture compounded by Urochloa ruziziensis, pigeon pea (Cajanus cajan ?Super N?); Sunflower (Helianthus annuus), and Buckwheat (Fagopyrum esculentum) on the residual forage mass at the Embrapa Agrossilvipastoril, in Sinop, MT, Brazil. The mixed were planted on March 10, 2020, after the soybean harvest. The experimental design was a randomized complete block design with three replicates. The treatments were four harvest frequencies. The harvesting frequencies were: Straw ? no-harvest during the off-season; Lax - with one harvest (at 115 days after planting); Moderate - two harvests (80 and 115 days after planting); and Heavy - three harvests (45, 80, and 115 days after The plots were harvested at 20-cm stubble height and there were not fertilized. On September 30, 2020, forage mass was harvested using three quadrats (0.5 m2) per plot, at soil level, to calculate residual forage mass, which was desiccated (4 L ha-1 of glyphosate) on October 23, 2020. The soybean (BG4781, Brevant) was seeded on November 07, when 88 kg of P2O5 was applied. On December 01, 68 kg of K surface-applied. The... Mostrar Tudo |
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Thesagro: |
Colheita; Forragem; Fungicida; Herbicida; Inseticida; Pastagem Mista. |
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Thesaurus NAL: |
Cropping systems; Helianthus; Livestock; Urochloa ruziziensis. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/228583/1/2021-cpamt-bcp-effects-harvesting-frequency-residual-forage-mass-mixed-pasture.pdf
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Marc: |
LEADER 03432nam a2200301 a 4500
001 2137189
005 2021-12-06
008 2021 bl uuuu u00u1 u #d
100 1 $aMATOS, B. F. de
245 $aThe effect of the harvesting frequency on the residual forage mass in mixed pastures.$h[electronic resource]
260 $aIn: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 56., 2021, Florianópolis. Animal science: challenges in production and sustainability: proceedings... Brasília, DF: Sociedade Brasileira de Zootecnia, 2021. p. 108.$c2021
500 $aEvento virtual.
520 $aThe use of different forage species in a mixed pasture is recommended to improve forage mass and soil characteristics. However, the frequency of harvest (e.g.; grazing or hay) can increase the forage removal during the off-season, and affect the residual forage mass to the following crop, especially in the non-till crop-livestock systems. We aimed to assess the harvest frequency effect in a mixed pasture compounded by Urochloa ruziziensis, pigeon pea (Cajanus cajan ?Super N?); Sunflower (Helianthus annuus), and Buckwheat (Fagopyrum esculentum) on the residual forage mass at the Embrapa Agrossilvipastoril, in Sinop, MT, Brazil. The mixed were planted on March 10, 2020, after the soybean harvest. The experimental design was a randomized complete block design with three replicates. The treatments were four harvest frequencies. The harvesting frequencies were: Straw ? no-harvest during the off-season; Lax - with one harvest (at 115 days after planting); Moderate - two harvests (80 and 115 days after planting); and Heavy - three harvests (45, 80, and 115 days after The plots were harvested at 20-cm stubble height and there were not fertilized. On September 30, 2020, forage mass was harvested using three quadrats (0.5 m2) per plot, at soil level, to calculate residual forage mass, which was desiccated (4 L ha-1 of glyphosate) on October 23, 2020. The soybean (BG4781, Brevant) was seeded on November 07, when 88 kg of P2O5 was applied. On December 01, 68 kg of K surface-applied. The crop management practices (e.g.; herbicide, insecticide, and fungicide) were similar to all plots, and on March 09, 2021, the soybean was harvested (data not showed). The residual forage mass was affected by the harvesting frequency (P=0.0296). The greatest residual forage mass was measured in the treatment where there was no harvesting (straw), on average 5625 kg DM ha-1. On the other hand, lax, moderate and heavy treatments presented similar residual forage mass (on average, 3000 kg DM ha-1). We concluded that although the residual forage mass was reduced when the off-season pastures were harvested, the number of harvest events did not affect the forage mass left on the field to assure the non-till cropping system. It is important to mention the soybean grain yield needs to be measured in the following crop season to understand the effect of the harvesting frequency during the off-season.
650 $aCropping systems
650 $aHelianthus
650 $aLivestock
650 $aUrochloa ruziziensis
650 $aColheita
650 $aForragem
650 $aFungicida
650 $aHerbicida
650 $aInseticida
650 $aPastagem Mista
700 1 $aARAÚJO, G. P. de
700 1 $aBEHLING NETO, A.
700 1 $aWRUCK, F. J.
700 1 $aOLIVEIRA JUNIOR, O. L. de
700 1 $aPEDREIRA, B. C. e
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