Journal of Animal and Plant Sciences
J. Anim. Plant Sci. [ISSN 2071 - 7024]
Volume 18(2): 2711 - 2722. Published June, 2013.
Performance of young bulls supplemented with different relation of protein and carbohydrate from suckling phase until slaughter in tropical pasture
Eriton
Egidio Lisboa Valente 1*, Mário Fonseca Paulino2, Edenio Detmann2,
Sebastião de Campos Valadares Filho2, Sidnei Antônio Lopes2
1Department of Animal Science, Universidade Estadual do Oeste do Paraná, Marechal Cândido Rondon, 85960-000, PR, Brazil
2Department of Animal Science, Universidade Federal de Viçosa, Viçosa, 36570-000, MG, Brazil
*Corresponding author: Eriton Egidio Lisboa Valente eritonvalente@yahoo.com.br
Keywords associative effects, beef cattle, calf, grazing, multiple supplement, production
1 SUMMARY
The effects of supplementation with different relations of
carbohydrate and protein on performance of young bull from 4 until 18
months were assessed. Fifty-five beef calves with an average initial
body weight of 138.3±3.4 kg and age between 90 and 150 days were used.
Animals were submitted to a 430-days experimental period. The
experimental treatments consisted of a Control= mineral mixture only;
HPHC= high protein and high carbohydrate supplement; HPLC= high protein
and low carbohydrate supplement; LPHC= low protein and high
carbohydrate supplement; LPLC= low protein and low carbohydrate
supplement. The amount of supplement was adjusted every 28 days. The
non-supplemented animals presented lower (P<0.05) average daily gain
(ADG) than supplemented animals. Non-supplemented animals presented
lower (P<0.05) DM intake than supplemented animals in the dry
season. However, in the rainy period, differences were not observed
(P>0.05) in DM intake. Nutritionals plans with low supply of
carbohydrate (HPLC and LPLC) presented greater supplement use
efficiency. It can be concluded that supplementation increase
performance of young bulls belong the productive cycle. However,
nutritional plans that supply low amount of carbohydrate (until 15% of
TDN requirement) have greater efficiency of supplement
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