Características de carcaças de caprinos alimentados com palma forrageira como fonte exclusiva de água
Características de carcaças de caprinos alimentados com palma forrageira como fonte exclusiva de água
<wallsezar@gmail.com>
Objetivou-se
com esta pesquisa, avaliar a morfometria, rendimentos de carcaça e cortes
The
objective of this research was to evaluate the morphometry, carcass yields and
commercial cuts of goats fed with forage palm as exclusive source of water. The
study used 35 castrated male goats, without defined racial pattern, with an
average weight of 18.6 kg and 8 months old, randomly distributed in 5 treatments,
being a control treatment, receiving a conventional diet(tifton hay +
concentrate); and two levels of forage palm (25% or 55%), with or without
access to drinking water. All treatments had a volume: concentrate ratio of
80:20. The field phase was carried out in the Small Ruminant Experimental Shed
of the Federal University of Alagoas(UFAL), Arapiraca Campus. The experiment
lasted 75 days, and at the end the animals were slaughtered. The carcasses were
weighed before and after 24 hours of cooling to obtain the yields of hot and
cold carcasses, true yield and losses by cooling. After cooling, the following carcass
measurements were evaluated: external and internal carcass length, width of the
croup and thorax, thoracic perimeter, thorax depth, croup perimeter, leg
perimeter and leg length, besides the scores of carcass conformation (1 to 5),
perirenal fat (1 to 3) and fat cover (1 to 5). The commercial cuts of the half
carcasses (neck, shoulder, ribs, saw, loin, and leg) were weighed separately.
The experimental design was entirely randomized, in a double factorial scheme
with a control as additional treatment: (2x2) + 1, totaling 5 treatments and 7 replicates/treatment,
using PROC MIXED of SAS 9.1. There was interaction only between palm level and
access or not to water only for croup circumference (P=0.046). The values of RCQ
(cold carcass yield) and RCF (cold carcass yield) in the control treatment
presented lower values when compared to the other treatments. There was no
difference for weights and yields of the cuts of goats fed 25% or 55% palm with
or without access to drinking water. However, it was observed that the weights
of the cuts were low, with average values of 0.82 kg of shoulder, 0.38 kg of
neck, 0.66 kg of ribs, 0.37 kg of saw, 0.34 kg of loin and 1.31 kg of leg. Thus,
the forage palm, in the proportion of 25 or 55%, can replace the water for
drinking without affecting the carcass characteristics of goats.
Dr. Almeida, Vitor Visintin Silva de.
Zootecnia.
Caprinocultura de corte.
Pequenos ruminantes.