Effects of excess dietary crude protein from soybean meal and dried distillers grains with solubles in diets for finishing pigs
Effects of excess dietar y crude protein from soybean meal and dried distillers grains with solubles in diets for finishing pigs
S M. Williams
C Feoli
S Issa
Terry L. Gugle
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Effects of excess dietary crude protein from soybean meal and dried
distillers grains with solubles in diets for finishing pigs
Abstract
A total of 180 pigs (90 barrows and 90 gilts, average initial weight of 148 lb) were used in a 67-d experiment to
determine the effects of excess dietary CP on growth performance and carcass measurements in finishing pigs.
The pigs were sorted by ancestry and blocked by weight with 12 pigs per pen and 5 pens per treatment.
Treatments were corn-soybean meal-based diets formulated to 15.3 and 18.3% CP and a
corn-soybeanDDGS-based diet formulated to 18.3% CP. Feed and water were consumed on an ad libitum basis until the
pigs were slaughtered (average final weight of 282 lb) at a commercial abattoir. Pigs fed diets with high CP had
lower (P < 0.001) final weight, ADG, ADFI, and HCW, but these results were caused entirely by the diet with
40% DDGS. Our results indicated that diets with 40% DDGS decreased growth performance and
economically important carcass measurements. However, the excess CP in those diets does not seem to be the
culprit.; Swine Day, 2008, Kansas State University, Manhattan, KS, 2008
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Authors
S M. Williams, C Feoli, S Issa, Terry L. Gugle, and Joe D. Hancock
This Research Report article is available in Kansas Agricultural Experiment Station Research Reports: https://newprairiepress.org/
kaesrr/vol0/iss10/1184
Swine Day 2008
EFFECTS OF EXCESS DIETARY CRUDE PROTEIN FROM SOYBEAN MEAL AND
DRIED DISTILLERS GRAINS WITH SOLUBLES IN DIETS FOR FINISHING PIGS
Summary
A total of 180 pigs (90 barrows and 90
gilts, average initial weight of 148 lb) were
used in a 67-d experiment to determine the
effects of excess dietary CP on growth
performance and carcass measurements in
finishing pigs. The pigs were sorted by ancestry and
blocked by weight with 12 pigs per pen and 5
pens per treatment. Treatments were
cornsoybean meal-based diets formulated to 15.3
and 18.3% CP and a
corn-soybean-DDGSbased diet formulated to 18.3% CP. Feed and
water were consumed on an ad libitum basis
until the pigs were slaughtered (average final
weight of 282 lb) at a commercial abattoir.
Pigs fed diets with high CP had lower (P <
0.001) final weight, ADG, ADFI, and HCW,
but these results were caused entirely by the
diet with 40% DDGS. Our results indicated
that diets with 40% DDGS decreased growth
performance and economically important
carcass measurements. However, the excess CP
in those diets does not seem to be the culprit.
Key words: carcass, dried distillers grains with
solubles, finishing pigs, growth, protein
Introduction
Many scientists (particularly in Europe)
suggest that excess CP in diets reduces
energetic efficiency in pigs. This lost efficiency
should be reflected in poor growth
performance measurements. Additionally, excess CP
in diets has been blamed for increased organ
weights leading to lower carcass yields. These
arguments are of particular interest to us
because diets with high inclusion of dried
distillers grains with soluble (DDGS) have an
abundance of CP. Thus, we designed an
experiment to determine the effects of excess dietary
CP from soybean meal vs. DDGS on growth
performance and carcass measurements of
finishing pigs.
Procedures
A total of 180 pigs (90 barrows and 90
gilts, average initial weight of 148 lb) were
used in a 67-d growth assay. The pigs were
sorted by sex and ancestry, blocked by weight,
and assigned to pens. There were 12 pigs per
pen and 5 pens per treatment. The pigs were
housed in a finishing facility with 6-ft ? 16-ft
pens having half solid and half slatted
concrete flooring. Each pen had a self-feeder and
nipple waterer to allow ad libitum
consumption of feed and water until the pigs were
slaughtered at an average weight of 282 lb.
The first treatment was a corn-soybean
meal-based diet formulated to 15.3% CP with (...truncated)