Data/hora: 05/06/2024 18:13:13

Provedor de dados: 	19	
País: 	Japan	
Título: 	Association of rumen fill score and energy status during the close-up dry period with conception at first artificial insemination in dairy cows	
Autores: 	Kawashima, Chiho; Karaki, Chihiro; Munakata, Megumi; Matsui, Motozumi; Shimizu, Takashi; Miyamoto, Akio; Kida, Katsuya.	
Data: 	2016-10	
Ano: 	2016	
Palavras-chave: 	Dairy cow; Dry period; First artificial insemination; Rumen fill score.	
Resumo: 	Recent studies have shown significant associations between prepartum energy status and postpartum fertility in dairy cows; therefore, the assessment of energy status by blood metabolites and metabolic hormones and suitable improvement of management during the prepartum period may enhance reproductive performance. Rumen fill score (RFS) is associated with feed intake; however, it is unknown whether RFS is also related to blood parameters. Therefore, this study investigated the relationship between RFS and energy status during the prepartum period, and their associations with conception at first artificial insemination (AI) after parturition. In 42 multiparous Holstein cows, RFS assessment and blood sampling were carried out twice a week during 3 weeks of the peripartum period. Ovarian cycles until AI were evaluated by measuring milk progesterone levels. Before calving, positive correlations were observed between RFS and total cholesterol, and RFS did not change in pregnant cows at first AI after parturition, whereas in non-pregnant cows, RFS decreased gradually as the calving day approached. After calving, non-pregnant cows showed lower energy status compared with pregnant cows, and some non-pregnant cows showed anovulation and cessation of estrous cycle. In conclusion, RFS during the close-up dry period is related to real-time energy status, and is associated with postpartum energy status and conception at first AI in dairy cows.	
Idioma: 	Inglês	
Identificador: 	http://ir.obihiro.ac.jp/dspace/handle/10322/4529

info:doi/10.1111/asj.12555	
Editor: 	Wiley	
Fonte: 	This is the peer reviewed version of the following article: Animal Science Journal: 87(10); OCT 2016; 1218-1224, which has been published in final form at http://doi.org/10.1111/asj.12555. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.