Impact of lactose substitution by dextrose on piglet

Impact of lactose substitution by dextrose
on piglet performance in the post-weaning period
Caroline GARD 1, Pierre-Stéphane REVY 2, Christian DELPORTE 1, Laetitia GUERIN-DEREMAUX 1
1
ROQUETTE, 62080 Lestrem, France - 2 CALCIALIMENT-VILOFOSS, Z.I. de la Gare, 22690 Pleudihen, France
Introduction
Whey powder is commonly included in piglet diets as a source of lactose. Dextrose, the crystalline form of glucose, is also used as a totally digestible energy source for young piglets.
The objective of this trial is to test partial and total substitution of lactose, provided by whey powder, by dextrose in post-weaning piglet diets.
Materials and methods
Diet composition
Methodology
• Animals:
- 1000 male and female piglets, weaned at 23±1 days old
Housed in 28 collective pens
- Initial weight at 28 days: 7.2kg
Final weight at 44 days: 12.2kg
• Treatment groups:
- “Reference Lactose diet”
- “Test diet with 50% whey powder substitution by dextrose”
- “Test diet with 100% whey powder substitution by dextrose”
Test diet - 100%
substitution by Dextrose
Cereals and derivatives (barley, wheat,
wheat middlings, biscuit meal)
69.4
69.9
67.8
Proteins and oils (extruded soybean,
pea protein, soybean meal, whey protein
concentrate, rapeseed oil)
15.7
17.1
19.2
Whey powder
10.3
4
-
-
4
8
4.6
5
5
Reference
Lactose diet
Test diet - 50%
substitution by Dextrose
Test diet - 100%
substitution by Dextrose
Crude protein (%)
17.5
17.5
17.5
Fat (%)
5.59
5.57
5.57
Starch (%)
34.3
34.7
33.4
Total sugar (%)
12.5
12.5
13.7
Premix (minerals, vitamins, amino acids)
Nutritional characteristics
Day 28
Day 44
n=320
“Reference Lactose Diet”
n=320
“Test diet with 50% Lactose
substitution by Dextrose”
n=319
“Test diet with 100% Lactose
substitution by Dextrose”
Day 23
approx. 1000 piglets
Test diet - 50%
substitution by Dextrose
Dextrose
Study design
Day 0
Reference
Lactose diet
Composition (%)
Prestarter diet
Piglet Age
Lactose (%)
7.1
3.6
1.35
Total lysine (%)
1.46
1.46
1.46
Total phosphorus (%)
0.63
0.64
0.64
Total calcium (%)
0.67
0.67
0.67
Net energy (MJ/kg)
10.6
10.6
10.6
Results
Figure 1: Feed intake between 28 and 44 days old
Figure 2: Average Daily Gain between 28 and 44 days old
350
323±16
335±16
335±16
Average daily gain (g/d) (±R.S.D)
Consumption (g/d) (±R.S.D)
350
300
250
200
150
100
50
0
Reference Lactose Diet
Test diet - 50%
substitution by Dextrose
Test diet - 100%
substitution by Dextrose
310±16
309±16
300
250
200
150
100
50
0
Figure 3: Feed conversion ratio between 28 and 44 days old
1.20
305±16
Feed conversion ratio
(g of feed/g of weight gain) (±R.S.D)
400
Reference Lactose Diet
Test diet - 50%
substitution by Dextrose
Test diet - 100%
substitution by Dextrose
1.09±0.05
1.10±0.05
Test diet - 50%
substitution by Dextrose
Test diet - 100%
substitution by Dextrose
1.05±0.05
1.00
0.80
0.60
0.40
0.20
0.00
Reference Lactose Diet
• Clinical observations: Over the whole trial period, 1 piglet died and 2 others were removed because of weight loss without any relation with a particular diet.
No phenomenon of diarrhoea was recorded.
• Zootechnical performances:
- The initial weight of the piglets was 7.2kg at day 28 compared to a final weight of 12.2kg at day 44.
- During the study period, from day 28 to day 44, the average feed intake was 331g/day (Fig.1), the average daily weight gain was 308g/day (Fig.2) and the feed conversion ratio
was 1.08 (Fig.3).
>> No significant differences were observed among the 3 diets.
Conclusion
Dextrose can fully substitute lactose provided by whey powder in post weaning diets without impairing piglet performances.
47th “Journées de la Recherche Porcine” – February 3rd and 4th, 2015 – Paris
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