ractopamine

ractopamine - Ractopamine, Response, Economics, and Issues...

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3/1/2000 Ractopamine, Response, Economics, and Issues Allan P. Schinckel Purdue University Department of Animal Sciences
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3/1/2000 Paylean™ - Ractopamine Feed additive; Feed 150 to 240 lbs. live weight (last 90 lbs. live weight gain); Feed at 4.5 to 18 grams/ton (5-20 ppm)
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3/1/2000 Paylean™ - Ractopamine Small compound; Partitions energy from fat growth to lean growth; Increases protein accretion and muscle growth; Increases muscle fiber diameter.
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3/1/2000 What is Ractopamine? 2200 β agonist; not a hormone; not a steroid; not “biotechnology.”
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3/1/2000 What does Ractopamine do? 20 ppm -- 18.5 g/ton for last 90 lbs. live weight gain. Increases fat-free lean growth 34.0% increases protein accretion 24.0% decreases feed intake 5.5% increases ADG 8.9% improves F/G 14.2% reduces backfat thickness 13.7% increases carcass lean mass 11.1% increases dressing percentage 1.5%
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3/1/2000 Impact of Ractopamine Level on Pig Growth and Carcass Measurement Ractopamine Level g/ton 0 4.5 9.0 18.0 ADG, lb/d 1.80 1.98 1.99 2.01 ADFI, lb/d 3.06 3.06 2.97 2.98 Feed/Gain 3.70 3.41 3.36 3.28 Dressing Percent 72.1 72.5 72.7 73.0 10th Rib fat depth, in. .99 .94 .92 .87 LEA, in 2 5.15 5.55 5.70 5.84 % Dissected lean 52.8 55.5 -- 58.2 Dissected Fat 27.1 25.2 -- 23.0 Watkins et al., 1988, 6 trials, 888 pigs
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3/1/2000
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3/1/2000 Ractopamine Impact on Pork Quality Visual color scores no impact Loin L no impact Loin A slightly lower Loin B slightly lower Firmness scores no impact Marbling scores no impact/slight increase Drip loss no impact Cooking loss no impact Ham processing yields 3-5% increase 24h Ph no impact
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3/1/2000 Ractopamine Sensory and Tenderness Sensory Property Juiciness no impact Flavor no impact Tenderness no impact Warner Bratzler sheer slight increase
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3/1/2000 Ractopamine response . . . is not constant; increases rapidly -- reaches a maximum of 22-26 lbs live weight gain or 19-24 days on Paylean™ feed; Then the response decreases to 20% of the average response at 90 lbs on Paylean™ feed.
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3/1/2000 Figure 1. Increase in Maximum Protein Deposition Due to Ractopamine Fed at 20 ppm
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3/1/2000 Fat-free lean gain of pigs receiving Paylean
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3/1/2000 Dietary lysine requirements for pigs receiving Paylean
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3/1/2000 Dietary lysine concentration for pigs receiving Paylean
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This note was uploaded on 03/01/2012 for the course ANSC 443 taught by Professor Staff during the Fall '08 term at Purdue.

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ractopamine - Ractopamine, Response, Economics, and Issues...

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