Somatotropina porcina exógena (STp) y su relación con los aminoácidos de la dieta en cerdos de finalización
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Date
2007
Journal Title
Journal ISSN
Volume Title
Publisher
Corporación Universitaria Lasallista
Abstract
Introduction. The porcine somatotropine hormone
from a recombinant origin (STp) is a compound that
modificates metabolism and is used in pork industry
during the growth and finalization stages. It allows
a different proportion of tissue deposition in
the final product. Materials and methods. In this
study 90 pigs were used ( 90,5± 0.4kg) during 28
days, in which the response to 4 doses of STp was
evaluated (a daily intramuscular injection during 28
days): 0, 2, 4 and 6 mg/pig and 2 true ileal digestible
lysine relations towards metabolizable energy (LYSEM):
2,15 (7/3, 25) and 2,72 (9g of Lys/3.3 Mcal of
EM/kg) over the daily food consuming (CDA in Spanish),
the daily gain of weight (GDP in Spanish), dorsal
fat (P2) (GD), chop eye area (AOCH in Spanish)
and gain of fat free loin tissue (GTMLG in Spanish).
Results. For the variables CDA, GDP, GD, AOCH and
GDTMLG, significative statistic differences were
found (p<0,05) between the treatments, obtaining
the highest performances in the Animals that received
the treatment with the maximum STp level
and LYSEM in their diets. Discussion. The increment
in the energetic consuming for the maintenance
for the use of increasing levels of STp and
LYSEM is associated, partly, to the increment of a
rate until 60% in the proteic re-change rate, and to a reduction in the lipogenesis, more than to an effect
on the lipolysis. Conclusions. The use of STp could
increase the weight of the pigs in process for slaughter,
without affecting the payment for the quality of
the processed meat.
Description
Keywords
Corporación Universitaria Lasallista, Somatotropina porcina exógena (STP), Cerdos - Crecimiento, Cerdos - Cría, Cerdos - Producción