Data/hora: 06/06/2024 01:09:42

Provedor de dados: | 19
País: | Japan
Título: | Relationship between the degree of insulin resistance during late gestation and postpartum performance in dairy cows and factors that affect growth and metabolic status of their calves
Autores: | KAWASHIMA, Chiho; MUNAKATA, Megumi; SHIMIZU, Takashi; MIYAMOTO, Akio; KIDA, Katsuya; MATSUI, Motozumi; 川島, 千帆; 清水, 隆; 宮本, 明夫; 木田, 克弥; 松井, 基純.
Data: | 2016
Ano: | 2016
Palavras-chave: | Dairy cow; Dry period; Insulin tolerance test; Metabolic status; Postpartum performance.
Resumo: | This study aimed to investigate the effects of insulin resistance (IR) during the close-up dry period on the metabolic status and performance of dairy cows as well as to determine the effects on body weight (BW) and metabolic status of their calves. An insulin tolerance test (ITT) was conducted by administering 0.05 IU/kg BW of insulin to 34 multiparous Holstein cows at 3 weeks prepartum. Blood samples were collected at 0, 30, 45 and 60 min after insulin injection, and cows were divided into two groups based on the time required for glucose to reach the minimum levels [non-IR (NIR), 45 min (n=28); and IR, 60 min (n=6)]. Blood or milk sampling and body condition score (BCS) estimation were performed twice weekly during the experimental period. Blood samples from calves were collected immediately after birth. Cows with IR showed lower BCS (P&lt;0.05) and serum urea nitrogen (P&lt;0.05) and glucose concentration (P=0.05) before calving, and lower serum non-esterified fatty acid concentration (P&lt;0.05) and milk yield (P&lt;0.05) and earlier resumption of luteal activity (P&lt;0.05) after calving; their calves showed lower BW (P&lt;0.05) and plasma insulin-like growth factor-I concentration (P&lt;0.001) and higher plasma insulin concentration (P&lt;0.05). In conclusion, IR at 3 weeks prepartum in dairy cows is related to postpartum metabolic status and performance along with growth and metabolic status of their calves.
Idioma: | Inglês
Identificador: | http://ir.obihiro.ac.jp/dspace/handle/10322/4363
Editor: | 日本獣医学会
Fonte: | 日本獣医学会