全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

EFEITO DO PERíODO PóS-PARTO SOBRE A TAXA DE PRENHEZ DE VACAS DE CORTE SUBMETIDAS à IATF (INSEMINA O ARTICIAL EM TEMPO FIXO)

DOI: 10.5747/ca.2010.v06.n2.a057

Keywords: eCG , Zebu cattle , Temporary calf removal

Full-Text   Cite this paper   Add to My Lib

Abstract:

This work aimed to evaluate the influence of postpartum period (precocious - of 28 to 44 days and late - of 45 to 90 days) on the bovine pregnancy rate using fixed-time AI. For that, 678 cows were divided in two groups: precocious group (G-P, n=151) and late group (G-T, n=527). The animals received CIDR + 2 mL of estradiol benzoate (BE) in the day zero (D0). After eight days (D8) the dispositive was removed and both groups received 2.5mL PGF2α, concurrent with PGF2α injection, they received either 1.5mL of eCG or temporary calf removal (RTB). In the next day (D9), the cows received 1 mL de BE and 24 hours later, the fixed-time AI was performed with Nelore bovine semen. The calves were returned to their mothers. The pregnancy rate was not different between the groups (p>0.05), G-P=40% and G-T=48%. The results indicate that females with less than 45 days of postpartum are able to hormone protocol of fixed-time IA.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133