| Record number | 510880 |
|---|---|
| Title | Effects of solid feed intake on nutrient utilisation from milk replacer in veal calves |
| Author(s) | Borne, J.J.G.C. van den; Alferink, S.J.J.; Heetkamp, M.J.W.; Gerrits, W.J.J. |
| Source | In: Energy and protein metabolism and nutrition. - Wageningen Academic Publishers (EAAP publication 137) - ISBN 9789086862863 - p. 89 - 90. |
| Event | 5th EAAP International Symposium on Energy and Protein Metabolism, Krakow, 2016-09-12/2016-09-15 |
| Department(s) |
Animal Nutrition Adaptation Physiology WIAS |
| Publication type | Abstract in scientific journal or proceedings |
| Publication year | 2016 |
| Abstract | This study was designed to assess the effects of solid feed (SF) supplementation on utilisation of macronutrients derived from milk replacer (MR) in veal calves. Thirty-two male Holstein-Friesian calves were randomly assigned to pairs, and each pair of calves was assigned to one of two levels of SF allowance: 9 or 27 g DM SF/kg0.75 per d. The SF consisted of 80% low-protein concentrates, 10% chopped wheat straw and 10% corn silage based on DM. MR was partly exchanged for SF (as 1:1.7) to achieve similar growth rates across treatments. In four experimental periods, each pair of calves was measured with or without supplementation of lactose, fat or protein (189 kJ extra digestible energy per kg0.75 per d). A higher level of SF intake did not affect energy utilisation for growth, but increased methane production and urinary energy excretion in calves. Utilisation of digestible nitrogen for growth increased from 53 to 63% with increasing SF level. Supplementation of protein increased nitrogen retention, but the efficiency of digestible nitrogen utilisation for growth decreased. Supplementation of lactose increased digestible nitrogen utilisation for growth by 6 (high SF) to 10% (low SF). The incremental efficiencies of metabolisable energy utilisation for growth were similar for fat (73%) and lactose (74%), whereas the incremental energetic efficiency for protein was 39%. In conclusion, the level of SF intake does not affect energy utilisation, but greater intake of low-protein SF and also lactose supplementation increase the efficiency of protein utilisation for growth in veal calves. |
| Comments |
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