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Estimation of the total efficiency of metabolizable energy utilization for maintenance and growth by cattle in tropical conditions R. Bras. Zootec.
Henrique,Douglas Sampaio; Vieira,Ricardo Augusto Mendonça; Malafaia,Pedro Antônio Muniz; Mancini,Maurício Cordeiro; Gonçalves,André Luigi.
Data of 320 animals were obtained from eight comparative slaughter studies performed under tropical conditions and used to estimate the total efficiency of utilization of the metabolizable energy intake (MEI), which varied from 77 to 419 kcal kg-0.75d-1. The provided data also contained direct measures of the recovered energy (RE), which allowed calculating the heat production (HE) by difference. The RE was regressed on MEI and deviations from linearity were evaluated by using the F-test. The respective estimates of the fasting heat production and the intercept and the slope that composes the relationship between RE and MEI were 73 kcal kg-0.75d-1, 42 kcal kg-0.75d-1 and 0.37. Hence, the total efficiency was estimated by dividing the net energy for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioenergetics; Growth; Net energy; Ruminants.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982005000300034
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