Animals, Housing and Husbandry. A total of 72 gilts were used, offspring of Newsham XL
terminal sires on Newsham US parent gilts. They were blocked by weight into two rows of
twelve adjacent pens separated by a central corridor in the same wing of the Purdue University
Swine Evaluation Unit. Each pen (6 ´ 10 ft) housed 3 pigs and had fully-slatted floors, a single
drinker, and a single-space feeder. Both water and feed were available ad libitum. The pens were
randomly assigned within block to one of two treatments, when they had reached an average
bodyweight of 188.5 lb, for the four weeks prior to slaughter; 1) finishing feed plus ractopamine
(9 g/ton –19.2% CP), 2) finishing feed alone (19.2% CP).
All pigs were weighed individually on a weekly basis to monitor growth performance and
pen feed intakes were recorded also weekly to determine feed intakes and feed efficiencies. At the
end of the four week trial period, pigs were loaded onto a flat-bed truck and transported to the
slaughter facility at the Purdue University West Lafayette campus – a distance of approximately
10 miles. At the abattoir facility, they were off-loaded and held in lairage for up to one hour prior
to slaughter.
Animals, Housing and Husbandry. A total of 72 gilts were used, offspring of Newsham XLterminal sires on Newsham US parent gilts. They were blocked by weight into two rows oftwelve adjacent pens separated by a central corridor in the same wing of the Purdue UniversitySwine Evaluation Unit. Each pen (6 ´ 10 ft) housed 3 pigs and had fully-slatted floors, a singledrinker, and a single-space feeder. Both water and feed were available ad libitum. The pens wererandomly assigned within block to one of two treatments, when they had reached an averagebodyweight of 188.5 lb, for the four weeks prior to slaughter; 1) finishing feed plus ractopamine(9 g/ton –19.2% CP), 2) finishing feed alone (19.2% CP).All pigs were weighed individually on a weekly basis to monitor growth performance andpen feed intakes were recorded also weekly to determine feed intakes and feed efficiencies. At theend of the four week trial period, pigs were loaded onto a flat-bed truck and transported to theslaughter facility at the Purdue University West Lafayette campus – a distance of approximately10 miles. At the abattoir facility, they were off-loaded and held in lairage for up to one hour priorto slaughter.
การแปล กรุณารอสักครู่..
