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| Guimarães,André Lasmar; Mercadante,Maria Eugênia Zerlotti; Canesin,Roberta Carrilho; Branco,Renata Helena; Lima,Maria Lucia Pereira; Cyrillo,Joslaine Noely dos Santos Gonçalves. |
| ABSTRACT The objective of this study was to evaluate the associations between feed efficiency and feeding behavior, growth and carcass traits in Senepol cattle. A total of 137 animals were evaluated. Of these animals, 36 males were evaluated in a second test, totaling 173 records (initial age of 466±96 days and initial weight of 426±104 kg). Residual feed intake (RFI) was calculated as the difference between observed and expected dry matter intake, estimated by regression of dry matter intake on average daily gain and metabolic body weight (BW0.75), and the animals were classified as negative (high efficiency) and positive RFI (low efficiency). The mean RFI was -0.838±0.078 and 0.797±0.075 kg DM day-1 for negative and positive RFI animals, respectively,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beef cattle; Feed intake; Residual feed intake. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000100047 |
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| Cardoso,Vera Lucia; Lima,Maria Lucia Pereira; Nogueira,José Ramos; Carneiro,Raul Lara Resende de; Sesana,Roberta Cristina; Oliveira,Elisa Junqueira; El Faro,Lenira. |
| The objective of this study was to calculate economic values for milk (MY), protein (PY) and fat productions (FY) and somatic cell count (SCC) which could be used to compose an economic index to rank animals involved in an international genetic evaluation program of Holstein cattle used in the commercial dairy population in Brazil. The main milk production systems (MPS) prevailing in the South and Southeast were defined based on the feeding management and production level of herds. To calculate feeding costs, energy requirements for the production of one kg of milk with the respective average protein and fat contents of each MPS were calculated. Feeding costs were obtained based on the regional prices of the diets' components. To calculate revenues, milk... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dairy cattle; Milk composition; Selection index. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014001200636 |
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| Jacinto-Valderrama,Rickyn Alexander; Sampaio,Guilherme Sicca Lopes; Lima,Maria Lucia Pereira; Cyrillo,Joslaine Noely dos Santos Gonçalves; Pflanzer,Sergio Bertelli. |
| ABSTRACT: The present study aimed to evaluate the effects of immunocastration on the animal growth, carcass traits, and meat quality of Nellore cattle receiving or not Ionophore supplementation at pasture or pasture with concentrate (semi-feedlot). The first experiment (Pasture) was carried out during the rainy season, while the second (supplemented = Semi-feedlot) was conducted during the dry season. In each assessment, 60 males were allocated into three treatments, in a completely randomized design: non-castrated, immunocastrated (anti-gonadotropin-releasing hormone vaccine), and immunocastrated animals receiving ionophore. The highly energetic supplemented diet was prepared using 85 % corn and 10 % soybean meal at 1 % body weight, while the ionophore... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: DFD; Beef tenderness; Marbling; Grown performance; Ionophores. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000200901 |
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