Inclusão da casca de soja no concentrado de bezerros lactentes Holandês-Zebu
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Data
2014-11-21
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Universidade Federal de Goiás
Resumo
This study aimed to evaluate the development of Holstein-Zebu receiving initial
concentrate with increasing levels of soybean hulls for their use in raising systems.
The treatments consisted of four levels of soybean hulls in the concentrate (0%,
10%, 20% and 30%) from the fifth day of age. Besides the concentrate, the animals
received four liters of milk replacer per day. The experiment was developed at the
Federal Institute of Goiás - Campus Rio Verde - GO, from August to November 2011.
It was used six calves per treatment from three to 59 days of age, with initial weight
of 36.80 ± 2.99 kg. The experimental design was completely randomized, with the
variables analyzed as split plot and regression to verify the behavior of variables. It
was evaluated the concentrate feed intake, feed conversion, growth rate, body
length, thoracic perimeter, height of the withers, body condition score and body
temperature from 14 to 14 days. The concentrate intake was evaluated daily. The
performance of experimental period lasted 56 days. At the 57th days of the
experiment (60 days old) five animals were slaughtered from each treatment to
assess the members and non-members of the carcass. Five calves also were
slaughtered with a day of life (animals reference). The experimental design was
completely randomized. The means were compared by the Tukey test (α = 0.05) and
regression to verify the behavior of variables. The diets did not affect (P <0.05) the
performance of the animals, the same happened with the members and nommembers parts of the carcass. The average concentrate consumption was 371 ±
60.9 g, and 935 ± 132.5 g at 8th weeks, indicating that they would be able to be
weanlings. There was significant effect (P <0.01) in concentrate intake during the
weeks. The average daily gain weight was 352 g for a feed conversion of 2.1 kg of
total dry matter consumed per kg daily gain. The average of the growth rate, thoracic
perimeter, and height of the withers was 0.91 cm, 1.22 cm and 1.10 cm / week,
respectively. The average cold carcass yield was 49.57%. The percentage values of
the rumen-reticulum (RU-RE), omasum (OM) and abomasum (AB) from the animals
slaughtered in relation of the empty weight were respectively 61.69%, 15.58% and
22.73. The rumen-reticulum growth in respect of animals with a day of life was 410%
or 4.1 times. The relative volume RU-RE, and OM AB was 65.56%, 3.03% and
31.27%, respectively. The soybean hull is an alternative for infants fed to calves
since they do not affect their performance
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FONTES, Antônio João. Inclusão da casca de soja no concentrado de bezerros lactentes Holandês-Zebu. 2014. 78 f. Tese (Doutorado em Ciência Animal) - Universidade Federal de Goiás, Goiânia, 2014.