Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 31917
Title Development metabolic partitioning of energy in young calves
Author(s) Arieli, A.; Schrama, J.W.; Hel, W. van der; Verstegen, M.W.A.
Source Journal of Dairy Science 78 (1995). - ISSN 0022-0302 - p. 1154 - 1162.
DOI https://doi.org/10.3168/jds.S0022-0302(95)76732-7
Department(s) Animal Nutrition
Animal Husbandry
WIAS
Publication type Refereed Article in a scientific journal
Publication year 1995
Abstract Modifications in thermal demand and energy partitioning in newborn calves were determined over time via indirect calorimetry. One-week-old calves were fed milk replacer at 70 and 110% of the metabolizable energy requirements for maintenance, at ambient temperatures of 7.5 or 19°C, over two consecutive but separately monitored 7-d balance periods. During wk l, N digestibility, energy digestibility, and energy metabolizability were lower than during wk 2. Heat production decreased, but retention of energy and fat increased, between balance periods. During wk l, initial IgG concentration in serum was positively correlated with digestibilities of N and energy, and hemoglobin concentration was negatively correlated with heat production. Regression analysis revealed that predicted basal metabolic rate, efficiency of metabolizable energy use, and metabolizable energy requirements for maintenance were lower for wk 2 than for wk 1. Decreased energy utilization in calves on restricted feedings is related to an increase in the utilization of protein as an energy source. Young calves need at least 2 wk to adapt to the combination of new environmental temperature and low feeding amount. Metabolic partitioning of energy may indicate completion of the adaptation stage.
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