Programa de IATF em novilhas puberes e prepuberes

Nonato, Marina Silveira; Costa, Mateus Gonçalves; Bezerra, Antonio Ray Amorim; Murta, Daniele Carolina Rodrigues Xavier; Murta, Danillo Velloso Ferreira; Santos, João Paulo Fernandes; Barbosa, Lucélia Karoline Gonçalves; Rufino, Cassyo de Araújo

doi:10.34117/bjdv5n11-148

Cited by 2 publications

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pregnancy rates according to racial composition are depicted in Figure 2, with rates of 55.11% for Nelore heifers and 64.36% for Angus (F1). The pregnancy rates obtained in this study are favorable at TAI and our results corroborate those observed by Nonato et al (2019) who found pregnancy rates of 45% to 59% in pubertal and pre-pubertal Nelore heifers. Pregnancy rates between 40% and 60% gestation rate are considered satisfactory when compared to the national average in TAI rograms (Sales et al, 2014;Andrade et al, 2018).…”

Section: Resultssupporting

confidence: 91%

Impact of breed, body score and animal category on the pregnancy rate of bovine females under IATF management

Campos¹,

Neto²,

Carvalho³

et al. 2023

Cad. Cienc. Agrar.

View full text Add to dashboard Cite

This study evaluate the impact of the reuse of the intravaginal progesterone implant (DIP), the body condition score and the racial composition on the pregnancy rate of Nelore and Angus heifers (F1) and Nelore cows of different categories submitted to different protocols of TAI, from a database of 3,093 females submitted to the same hormonal induction protocol and from the mating season of a commercial farm in the north of Minas Gerais. The racial com- position influenced the pregnancy rate of heifers, with rates of 55.11% for Nellore heifers and 64.36% for ½ Angus, showing that the ½ Angus breed has 1.55 times more chances of successful gestation compared to the breed Nellore. There is no effect of the progesterone implant until the third use on the pregnancy rate of the heifers evaluated. The increase of one unit in the body condition score on the scale of 1 to 5 implies 1.9109 or 91.09% times more success in pregnancy. The category of calving cows did not significantly affect the pregnancy rate in the evaluated herd, with pregnancy rates of 58.1%, 62.8%, 77.7% and 62.9% for primiparous, early primiparous, secondary and multiparous, respectively. The introduction of ½ Angus heifers to explore the effects of heterosis and complementarity between breeds is a viable alternative. Cows, when well managed in the postpartum period, obtain pregnancy rates higher than that observed in the national average.

show abstract

Section: Resultssupporting

confidence: 91%

Impact of breed, body score and animal category on the pregnancy rate of bovine females under IATF management

Campos¹,

Neto²,

Carvalho³

et al. 2023

Cad. Cienc. Agrar.

View full text Add to dashboard Cite

show abstract

Desempenho Zootécnico Na Fase De Cria Em Animais Mestiços (Nelore X Rubia Gallega) Em Regime Extensivo De Criação Em Clima Tropical No Centro-Oeste Brasileiro

Rodrigues,

Marques Filho

2024

Rev. Foco

View full text Add to dashboard Cite

Objetivou-se avaliar o desempenho zootécnico na fase de cria em animais F1 ½ sangue (Nelore x Rubia Gallega), em regime extensivo de criação em clima Tropical no Centro-oeste brasileiro. Para isso, estão sendo utilizados dados históricos do controle zootécnico a partir de 500 animais, machos e fêmeas, mestiços (Nelore x Rubia Gallega), do nascimento ao desmame, em regime exclusivo de pastejo em Brachiaria brizantha cv. Marandu, para determinar o peso ao nascimento, o ganho de peso médio diário e o peso ao desmame, bem como a taxa de mortalidade. A Média e desvio padrão (X ± DP) do Peso ao Nascimento (PN), Peso ao Desmame (PD) e do Peso ao Sobreano (PS) dos animais Machos da Raça Nelore e ½ sangue (Nelore X Rubia Gallega) em regime de pastejo durante a fase de cria e recria, foi equivalente a 25,4 ± 4,6 e 26,16 ± 5,1, 167,98 ± 30,98 e 204 ± 33,55, e 208,41 ± 38,43 e 268 ± 38,99, respectivamente. Da mesma forma em fêmeas, foi de 23,81 ± 3,4 e 24,73 ± 3,2, 147,53 ± 26,31 e 199,0 ± 29,16, e 199,63 ± 23,26 e 247,75 ± 32,1, respectivamente. Conclui-se que animais mestiços Nelore X Rubia Gallega possuem menor peso ao nascimento e maior peso ao desmame e sobreano que bezerros Nelore P.O. em sistema de manejo extensivo com Brachiaria Brizantha cv. Marandu.

show abstract

Programa de IATF em novilhas puberes e prepuberes

Cited by 2 publications

References 2 publications

Impact of breed, body score and animal category on the pregnancy rate of bovine females under IATF management

Impact of breed, body score and animal category on the pregnancy rate of bovine females under IATF management

Desempenho Zootécnico Na Fase De Cria Em Animais Mestiços (Nelore X Rubia Gallega) Em Regime Extensivo De Criação Em Clima Tropical No Centro-Oeste Brasileiro

Contact Info

Product

Resources

About