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PSXV-34 Effects of feeding either pelleted concentrate and TMR or only TMR from 10 to 18 weeks of age on performance of dairy calves

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Rosé veal farmers using TMR want to feed calves high-energy TMR already from weaning, either alone or in combination with a pelleted concentrate. The objective was to test how weaned dairy bull calves perform from 10 to 18 wk of age when offered either free choice between pelleted concentrate and TMR (FREE) or only TMR (TMR). The experiment used 32 Holstein bull calves purchased at 11 ± 1 d of age and 47 ± 1 kg LW (Mean±SE). From 2 wk until weaning at 8 wk of age, calves were offered a total of 224 L milk replacer (23% CP, 19% fat). From 2 to 10 wk of age, calves had free access to a pelleted concentrate (20% CP) and chopped hay (14% CP). At 10 wk (97 ± 2 kg LW) calves were assigned to FREE or TMR. The pelleted concentrate and the TMR had (kg DM basis) similar NE (8.8 MJ), CP (213 g), NDF (195 g), and starch contents (328 g), but varied in DM (88 vs. 70%), feed composition, and physical form. The TMR included 31% first-cut grass silage. Hay comprised 2.5% of NEI for both FREE and TMR. TMR intake comprised 61% and concentrate pellet intake 36.5% of NEI for FREE calves. LW at 18 wk was 178 and 173 kg (n.s.) and ADG from 10 to 18 wk was 1.46 and 1.36 kg/d (P<0.05) for FREE and TMR, respectively. The long-term consequences for growth was studied from 18 wk until slaughter at 42 wk. In this period, all calves were fed the same TMR (15% CP). The TMR calves compensated with higher ADG than FREE (1.44 vs. 1.36 kg/d) leading to similar ADG from birth to slaughter for FREE and TMR. In conclusion, both post-weaning feeding strategies can be applied without log-term consequences for overall productivity in rosé veal calves.
OriginalsprogEngelsk
TidsskriftJournal of Animal Science
Vol/bind96
Nummersuppl_3
Sider (fra-til)242
ISSN0021-8812
DOI
StatusUdgivet - 7 dec. 2018

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