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| Silva,Deiyse Alves; Rocha Júnior,Vicente Ribeiro; Ruas,José Reinaldo Mendes; Santana,Pedro Felipe; Borges,Luana Alcântara; Caldeira,Luciana Albuquerque; Reis,Sidnei Tavares dos; Menezes,Jordana Carvalho de; Lanna,Dante Pazzanese Duarte. |
| Abstract: The objective of this work was to evaluate the chemical composition and fatty acid profile of milk from F1 Holstein/Zebu cows in different lactation periods, when receiving different levels of dietary supply in percentage of body weight. Sixty cows were evaluated, with five levels of dietary supply and three lactation periods. The levels of dietary supply had no effect on the production of milk corrected to 3.5% fat (12.25 kg per day). There was also no effect of dietary supply levels, in the different lactation periods, on contents of fat (3.34%), protein (3.41%), lactose (4.60%), total solids (12.0%), defatted dry extract (8.80%), and urinary nitrogen (14.5 mg dL-1), nor on somatic cell count (89.98 mL-1). As the dietary supply level was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Desirable fatty acids; F1 Holstein/Zebu; Lactation period; Milk quality. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000104304 |
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| Santana,Pedro Felipe; Rocha Júnior,Vicente Ribeiro; Ruas,José Reinaldo Mendes; Monção,Flávio Pinto; Borges,Luana Alcântara; Rigueira,João Paulo Sampaio; Ramos,Joyce Cipriana Pacheco; Gomes,Virgílio Mesquita. |
| ABSTRACT The objective of this study was to evaluate the effect of quantitative feed restriction level on nutrient intake and digestibility, nitrogen balance, efficiency and feeding behavior, and productive performance of F1 Holstein × Zebu cows in late lactation. Sixty F1 Holstein × Zebu cows were used at the stage of late lactation (183.0±17.5 days of lactation) and with initial body weight (BW) of 499±30 kg. The experimental arrangement adopted was the completely randomized design, with five feed restriction levels (3.39, 2.75, 2.50, 2.25, and 2.00% of BW) and twelve cows as replicates for each treatment. The roughage:concentrate ratio was of 75:25 in the total dry matter of the diet. The restriction of dietary supply from 3.39 to 2.0% of BW linearly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crossbred cows; Feed efficiency; Milk production; Nitrogen balance. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100701 |
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