322
Evaluation of increasing peptone blend on nursery pig performance
A total of 270 pigs (PIC 327 × 1050, initially 7.1 kg) were used in a 28-d trial to evaluate the effects of increasing levels of a peptone blend on nursery pig performance. The peptone blend is derived from pharmaceutical extraction of chondroitin sulfate from bovine cartilage and then drying on a soybean hull carrier. Each treatment had 8 replicate pens and 6 or 7 pigs per pen. Dietary treatments were: (1) a diet with 1% blood meal and 2% select menhaden fish meal (positive control), (2) a diet with no added specialty protein source (negative control), (3) a diet containing 4% peptone, (4) a diet containing 8% peptone, or (5) a diet containing 12% peptone. Experimental diets were formulated to contain 1.30 % SID Lys, and a minimum Val:Lys ratio of 68% without any adjustment for dietary energy content and fed for 14 d. Then a common Phase 2 diet was fed for an additional 14 d to determine carry over effects on growth performance. From d 0 to 14, pigs fed increasing peptone blend had increased (linear, P<0.001) ADFI but poorer (linear, P<0.001) G:F. From d 14 to 28, when pigs were fed a common diet, pigs previously fed increasing peptone blend had increased (linear, P=0.03) ADFI and poorer (linear, P=0.001) G:F. Overall (d 0 to 28), pigs fed diets with increasing peptone blend for the first 14 d had increased (linear, P<0.001) ADFI and poorer G:F (linear, P<0.001) with no differences in ADG (P=0.87). Pigs fed the positive control diet had increased (P=0.01) overall ADFI compared with pigs fed negative control diet. Up to 4% of the peptone blend can be used in nursery diets from 7 to 11 kg without negatively impacting growth performance.
|
|
|
|
|
|
|
|||||
Item |
Positive control |
Negative control |
4% peptone |
8% peptone |
12% peptone |
SEM |
|||||
d 0 to 14 |
|
|
|
|
|
|
|||||
ADG, g |
283 |
265 |
264 |
258 |
281 |
12.5 |
|||||
ADFI, ga |
399 |
371 |
386 |
429 |
463 |
13.5 |
|||||
G:Fa |
0.708 |
0.716 |
0.683 |
0.601 |
0.608 |
0.02 |
|||||
d 0 to 28 |
|
|
|
|
|
|
|||||
ADG, g |
416 |
401 |
396 |
386 |
402 |
8.8 |
|||||
ADFI, ga,b |
651 |
608 |
624 |
651 |
685 |
13.3 |
|||||
G:Fa |
0.640 |
0.659 |
0.636 |
0.593 |
0.588 |
0.01 |
|||||
BW, kg |
|
|
|
|
|
|
|||||
d 0 |
7.1 |
7.1 |
7.1 |
7.1 |
7.1 |
0.06 |
|||||
d 14 |
11.1 |
10.9 |
10.8 |
10.8 |
11.2 |
0.21 |
|||||
d 28 |
18.8 |
18.4 |
18.2 |
18.0 |
18.5 |
0.27 |
|||||
a Linear increasing peptone (P<0.05).
b Positive vs. Negative control (P<0.05).
Keywords: growth performance, nursery pig, peptone blend