Effect of energy source and escape protein on receiving and finishing performance and health of calves.

Abstract

Two receiving and two finishing trials evaluated energy source and escape protein supplementation for calves. In receiving Trial 1, 398 calves (257 ± 24 kg BW) were used in a 2 × 2 factorial arrangement of treatments. Energy sources were dryrolled corn (DRC) and wet corn gluten feed (WCGF); each was fed without or with supplemental escape protein (EP). Calves fed WCGF gained slower ( P < .05) and consumed less DM ( P < .01) than calves fed DRC. Feed efficiency improved ( P < .10) with EP supplementation. In finishing Trial 1, 240 calves (305 ± 21 kg BW) were used. The arrangement of treatments was the same as in receiving Trial 1. Calves fed DRC/WCGF tended ( P = .15) to be more efficient and consumed less DM ( P < .05) than calves fed DRC. In receiving Trial 2, 315 calves (252 ± 23 kg BW) were fed diets similar to those fed in receiving Trial 1. Calves fed WCGF consumed less DM ( P < .01), gained similarly ( P > .15), and were more efficient ( P < .10) than calves fed DRC. In finishing Trial 2, 320 calves (298 ± 23 kg BW) were fed diets containing DRC, DRC/WCGF, high-moisture corn (HMC), HMC/WCGF, and DRC/HMC; each was fed without or with supplemental EP. An energy source × protein supplement interaction was detected for gain ( P < .05) and efficiency ( P < .01). Results suggest that WCGF has a NE g greater than DRC in receiving diets and a NE g similar to that of DRC but lower than that of HMC in finishing diets.

Effects of dietary urea concentration on performance and health of receiving cattle and performance and carcass characteristics of finishing cattle

“…No differences (P > 0.10) were noted among treatments for ADG during days 0 to 14, 15 to 28, or for the 28-d receiving period. This agrees with results of McCoy et al (1998), who observed that ADG by newly received calves were not affected by protein supplement. No differences (P > 0.10) were noted in DMI of hay for days 0 to 14, or DMI for the overall 28-d receiving period.…”

“…ed) during the experiment (Table 3). In contrast, McCoy et al (1998) reported a negative correlation between metabolizable protein supply and morbidity, indicating that increased metabolizable protein supply might improve health. Our data suggest that dietary urea concentration up to 1% DM in a 14% CP diet (steam-flaked corn based) has no affect on BRD morbidity.…”

Desempenho e características de carcaça de bezerros confinados recebendo dietas com diferentes degradabilidades da fração protéica

“…Quanto à utilização de fontes ou níveis protéicos, os resultados observados têm sido discretos ou mesmo ausentes (SINDT et al, 1993;SHAIN et al, 1998;McCOY et al, 1998).…”

Fontes energéticas e protéicas para bovinos confinados em fase de terminação

“…Além disso, o farelo de soja pode aumentar o fornecimento de proteína metabolizável não só através do maior fluxo de proteína microbiana como pelo aporte de proteína não degradável no rúmen ao intestino (MILTON et al, 1997b Entretanto nas 11 comparações (SINDT et al, 1993 a,b;CECAVA et al, 1994;CAMPBELL et al, 1997;BARAJAS E ZINN, 1998;McCOY et al, 1998;DUT et al, 2003;GLEGHORN et al, 2004) A eficiência alimentar (GPD/CMS) dos animais alimentados com milho (0,153) foi similar (P>0,05) à dos animais alimentados com sorgo (0,146). Estes dados não estão de acordo com os dados da revisão de SANTOS et al (2004).…”

“…Nas 11 comparações (SINDT et al, 1993a,b;CECAVA et al, 1994;CAMPBELL et al, 1997;BARAJAS E ZINN, 1998;McCOY et al, 1998;DUT et al, 2003;GLEGHORN et al, 2004) entre proteína verdadeira e uréia para bovinos em terminação, compiladas por SANTOS (2005), com rações ricas em milho ou sorgo, diferentemente deste experimento, a eficiência alimentar (GPD/CMS) não diferiu em 10 comparações. A eficiência (GPD/CMS) foi de 0,161 nos tratamentos com a uréia contra 0,158 com proteína verdadeira.…”