Efecto del propionato de calcio en el peso vivo, consumo y canal de corderos alimentados con heno de alfalfa ( Medicago sativa )
2018
Calcium propionate (PrCa) is a hepatic gluconeogenic
precursor in ruminants, but its use as an energy source in food
it is questioned for its hypophagic effects. The objective of
this study was to evaluate the addition of PrCa to diets with
alfalfa hay (
Medicago sativa
) and molasses, on live weight,
food consumption and carcass characteristics of lambs. The
experimental design was completely randomized; treatments
were four diets with 0 (control), 30, 35 and 40 g of PrCa per
kg of dry matter that were randomly assigned to 32 (eight
repetitions per treatment) Ramboulliet lambs (initial average
live weight 28.1
2.1 kg). Data was analyzed with a mixed
model (treatment as fixed and lamb as random) and means
were compared with least squares means. The PrCa added
to the diet replaced alfalfa hay. Evaluation lasted 42 d. Live
weight, food consumption and feed conversion were not
different (p
0.05) between the treatments. The yield of the
cold and hot carcass was higher in lambs fed with 35 g PrCa,
compared to the three other treatments (p
0.05). Diets with
PrCa increased the degree of conformation and the area of the
Longissimus dorsi
, and they decreased the degree of fatness,
the back and perirenal fat, and the pH of the meat, compared
to the control (p
0.05). Polynomial analysis indicated that
the most desirables attributes were obtained in the carcass
with 40 g of PrCa. Whilst 35 g of PrCa did not affect the
consumption of dry matter nor the live weight of lambs, but
their yield and carcass quality attributes improved.
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