Pig International - November 2012 - 18
Increasing sow productivity with nutrition
Adding dry semi-coated acidifier to a sow's diet could
lead to improved efficiency and heavier piglets at weaning.
By Leif Göransson
Sow productivity has increased
substantially during the past few
decades and this has put a special focus
on management and feeding. Essential
parameters to consider are sow health,
viability of the newborn piglets and a
sow's milk yield, which is correlated
with the feed intake of the lactating sow.
Sow feed acidifier
In a recent experiment in Spain,
adding dry semi-coated acidifier in sow
feed was investigated with respect to
production parameters in two Spanish
herds with 750 (Herd A) and 350 (Herd
B) cross-bred (LY) sows, respectively.
The sows were randomly allocated to
the control or FA groups at service,
with the restriction that first litter sows
were equally divided on the groups.
The FA group of sows were fed
the same pregnancy and lactation
diets as the control sows were,
except for the addition of the 0.5%
BOLIFOR FA2300S acidifier.
The sows' back fat was
ultrasonically measured at farrowing
and weaning. Rectal temperature was
measured the day after farrowing
and all piglets were individually
weighed at birth and at weaning.
The feed intake of the sows was
measured on groups of sows in Herd
A and individually in Herd B. Health
records of the piglets were collected
during the suckling period. In Herd
A, weaning took place at 21 days
and in Herd B at 28 days. Statistical
analysis was performed with the
Statistical Analysis System, version
9.2 (SAS Institute Inc., Cary, NC,
USA). The statistical model included
effects of herd and treatment.
CHART 1: Characteristics
of death in Herd A (control group)
The health status and cause of death was closely monitored in Herd A. The
numbers of piglets dead due to weakness, runt syndrome and diarrhea were in
majority in the control group.
To learn more...
about pig nutrition, see
"Emerging issues in swine
Feed research results
The production facilities and
other conditions differed between
the herds and so did the production
performance. Sows in both herds
responded more or less on the
dietary addition of FA (see Table 1).
The sows were randomly selected
and fed the same feed allowances
during pregnancy within the herd.
Still, the FA group had more fat on
the body, compared with control
sows, indicating improved feed
efficiency for these sows.
During the lactation period the FA
sows consumed more feed in both
herds. In Herd B, keeping records
on individual basis, the difference
proved to be statistically significant.
Lactation failure is a common disease,
resulting in medical treatments of the
sows, increased piglet mortality and
deprived weight gain of the litters.
Diseased sows have high rectal
temperature and 39.5 degrees C is
often used as an indicative limit for
sickness. In Herd A, 13 sows in the
control group exceeded 39.5 degrees
C the day after farrowing, compared
www.WATTAgNet.com | November/December 2012