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Energy utilization of light and heavy weaned piglets subjected to different dietary energy levels R. Bras. Zootec.
Ribeiro,Andréa Machado Leal; Farina,Giovani; Vieira,Marcia de Souza; Perales,Valentino Arnaiz; Kessler,Alexandre de Mello.
ABSTRACT This study was conducted to evaluate the effects of dietary metabolisable energy (ME: 3.25, 3.40, 3.55, or 3.70 Mcal kg−1) and weaning weight (WW: light 4.0±0.7 kg, and heavy: 6.3±0.6 kg) on productive response and energy utilization of weaned piglets. Sixty-four male piglets were housed in 32 metabolic cages (two animals per cage) during the first 14 d postweaning. At day 15, only one animal per cage was kept until day 28. Body composition, energy, and nutrient deposition rates and energy utilization efficiency were measured through a comparative slaughter procedure. Piglets with light WW had a poorer feed conversion ratio and lower weight gain and feed intake when expressed per live weight. Increased ME led to greater daily fat deposition in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Metabolism; Pig nutrition; Protein:energy ratio; Tissue deposition.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000900532
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Carcass traits of Nellore, F1 Simmental × Nellore and F1 Angus × Nellore steers fed at maintenance or ad libitum with two concentrate levels in the diet R. Bras. Zootec.
Oliveira,Ivanna Moraes de; Paulino,Pedro Veiga Rodrigues; Valadares Filho,Sebastião de Campos; Detmann,Edenio; Paulino,Mário Fonseca; Gomide,Lúcio Alberto de Miranda; Duarte,Marcio de Souza; Couto,Victor Rezende Moreira.
This trial was conducted to evaluate the quantitative carcass traits of Nellore, F1 Simmental × Nellore and F1 Angus × Nellore steers fed at maintenance level or ad libitum with 1% and 2% of the body weight in concentrate. The animals were allotted to the treatments in a completely randomized experimental design, in a 3 × 3 factorial arrangement. The animals fed the ad libitum diet with more concentrate had greater cold carcass weight, cold carcass yield and longissimus muscle area/100 kg of cold carcass weight when compared with animals fed the diet with low concentrate allowance. There was no difference between the ad libitum diets for all of the carcass cuts yields, except for top sirloin. Crossbred animals had cold carcass yield larger than the Nellore...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carcass yield; Longissimus muscle area; Tissue deposition.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200042
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