Behaviors associated with cows more prone to produce milk with reduced stability to ethanol test due to feeding restriction

Ciência Rural

Ribeiro, Maria Edi Rocha³  Fischer, Vivian¹  Stumpf, Marcelo Tempel²  Kolling, Giovani Jacob¹  Silva, Alessandra Ventura da¹  Santos, Carolina da Silva dos¹ 

[1] Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil;Universidade Federal do Rio Grande, São Lourenço do Sul, Brazil;Embrapa Clima Temperado, Pelotas, Brazil

关键词: Bos taurus taurus;    feeding restriction;    ingestive behaviour;    milk stability;    social behaviour;   

DOI  :  10.1590/0103-8478cr20151246

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

:The experiment was carried out to identify changes in the behaviorr of lactating cows induced by severe feeding restriction and further refeeding that could serve as facilitators for the visual identification of cows more prone to produce milk with reduced stability. Twelve cows were separated into two groups: Control: full diet supply; Restriction: 50% of the full diet. Feed restriction lasted seven days (Period 1), with posterior supply of full diet for seven days (Period 2) for all treatments. Behavior was observed on the first and fifth days in each period from 08h40 to 19h00. Ingestive and social behavior were monitored. Cortisol assessed stress levels. Analysis of variance and multifactorial statistical analyzes were performed. Adequate feed supply reduced stress, improved animals' welfare and milk stability to the ethanol test. Elevation in the incidence of behavior related with hunger, frustration and discomfort is an indicator of cows more prone to produce milk with reduced stability.

【 授权许可】

Unknown