|
|
|
|
|
| Poncheki,Jessica Karina; Canha,Maria Luíza Schultz; Viechnieski,Sandro Luiz; Almeida,Rodrigo de. |
| The objective of this study was to describe daily body weight (BW) changes in the first 100 days of lactation in confined dairy cows and to associate BW loss with productive and reproductive performance. Data included 26,344 daily BW measurements of 372 Holsteins calving between June 2011 and June 2012 in a commercial herd in the South of Brazil. Cows were automatically weighed and were assigned according to parity. Individual measurements were smoothed using cubic splines, generating nadir BW, days to nadir BW and the BW loss (absolute and relative values). This approach used days in milk (DIM) as a single smoothing variable. Body weight at calving differed across parities: 570.5, 653.5, and 699.9 kg, for the 1st, 2nd and 3rd and subsequent parities,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Body weight loss; Milk production; Pregnancy ratio; Transition period. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000500187 |
| |
|
| |
|
| |
|
|
| Doska,Maria Cecília; Silva,Delma Fabíola Ferreira da; Horst,José Augusto; Valloto,Altair Antônio; Rossi Junior,Paulo; Almeida,Rodrigo de. |
| The present study was conducted to determine the relationship between milk urea nitrogen (MUN) and milk yield, fat and protein contents, breed and season effects, parity and days in milk in dairy cows from Paraná State, Brazil. A total of 127,428 test-days from 16,013 dairy cows belonging to 96 herds enrolled in an official milk recording program were analyzed. Multivariate mixed model methodology was used to determine the relationship between MUN and the fixed effects and the covariable milk production. Milk urea nitrogen averaged 14.45±4.60 mg/dL. Positive and intermediate association between MUN and milk yield (r = 0.34) were found. Holstein cows showed lower MUN adjusted means than crossbred, Jersey, and Brown Swiss cows: 14.18 vs. 15.49, 16.12, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy cattle; Nutrition; Protein. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300032 |
| |
|
|
| Michelotti,Tainara Cristina de Abreu; Silva,Ricardo Antonio da; Carneiro,Jorge Henrique; Navarro,Rodrigo Barros; Carvalho,Igor Quirrenbach de; Paula,Eduardo Marostegan de; Ferraretto,Luiz Felipe; Caetano,Mariana; Lanna,Dante Pazzanese Duarte; Almeida,Rodrigo de. |
| ABSTRACT: Ensiling corn for longer periods is a strategy used to increase rumen bacteria access to starch. In fact, when corn is ensiled for insufficient periods, starch digestibility decreases, as evidenced by excreted starch. This study investigates the effects of corn silage ensiling time on starch digestibility of dairy cows through fecal starch analysis. The trial was conducted during the spring of 2013 and the fall of 2014 on twenty dairy herds located in the state of Paraná, southern Brazil. Total mixed ration (TMR), whole-plant corn silage (WPCS) and fecal samples were collected for determination of dry matter (DM), neutral detergent fiber (NDF), acid detergent fiber (ADF), lignin and starch. Apparent total tract starch digestibility (ATTSD) was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ensiling period; Fecal starch; Whole-plant corn silage. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000200401 |
| |
|
|
| Bond,Guilherme Borges; Almeida,Rodrigo de; Ostrensky,André; Molento,Carla Forte Maiolino. |
| O bem-estar de animais de produção tem sido discutido nos âmbitos comercial, social e acadêmico, sendo que tal discussão pode ser enriquecida pela elaboração de protocolos de diagnóstico de bem-estar animal bem definidos, favorecendo a regulamentação de uma legislação específica. O objetivo desta revisão é discutir os métodos de diagnóstico de bem-estar animal e apontar os principais pontos críticos que afetam o bem-estar dos bovinos leiteiros. O diagnóstico de bem-estar compreende a observação do comportamento animal e de indicadores fisiológicos e sanitários, como análise hematológica e dosagem de hormônios, análise do escore de locomoção, a observação de lesões corporais e o estado geral de saúde dos animais. Tais ferramentas permitem verificar quais... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Estresse; Leite; Produção; Vacas leiteiras. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000700024 |
| |
|
|
|
