Impact of lactose substitution by dextrose on piglet
Transcription
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 The information contained in this document is to the best of our knowledge true and accurate but all instructions, recommendations or suggestions are made without guarantee. Since the conditions of use are beyond our control, we disclaim anyliability for loss and/or damage suffered from use of these data or suggestions. Furthermore, no liability is accepted if use of any product in accordance with these data or suggestions infringes any patent. No part of this document may be reproduced by any process without our prior written permission. © Roquette Frères S.A. - D3C - 01/2015