Animal Protein Factor and Antibiotic Supplementation of Small Grain Rations for Swine

Bowland, J. P.; Beacom, S. E.; McElroy, L. W.

doi:10.2527/jas1951.103629x

Cited by 13 publications

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“…In several experiments dietary antibiotics have increased killing-out percentages, but these have sometimes been associated with fatter carcasses (e.g. Huang & McCay, 1953;Pierce, 1954;Bowland, Beacom & McElroy, 1951;Wallace et al 1954).…”

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The growth of pigs kept to one level of feeding, in two environments, and fed diets with and without an antibiotic

Lucas¹,

Calder²

1955

J. Agric. Sci.

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1. Pigs housed in both a good and a bad piggery were kept to a medium plane of feeding on diets with and without a procaine penicillin supplement. Antibiotic improved neither efficiency nor rate of growth in either piggery during the period from weaning to 100 lb. live weight, nor from then to slaughter at 200 lb. live weight. The average temperatures during the first half of the experiment were 43 and 51° F. in the bad piggery and in the sleeping pens of the good piggery respectively. During the second half of the experiment these averages were 54 and 58° F. respectively.2. Between weaning and 100 lb. live weight, pigs housed in the bad piggery grew 6% more slowly and 5% less efficiently than in the good piggery, but although the growth rates fitted in well with previous observations, neither difference was statistically significant in this experiment.3. Between 100 and 200 lb. live weight pigs housed in the good piggery grew 3% less efficiently than in the bad piggery, but there was no difference in rate of growth. The difference in efficiency was statistically significant.4. Carcasses from pigs housed in the good piggery were fatter than from pigs housed in the bad piggery. These fatter pigs also had higher killing-out percentages.5. Although dietary antibiotic supplement had no effect upon growth rates or carcass measurements, it resulted in higher killing-out percentages.

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confidence: 99%

The growth of pigs kept to one level of feeding, in two environments, and fed diets with and without an antibiotic

Lucas¹,

Calder²

1955

J. Agric. Sci.

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“…Though it is generally accepted that this vitamin accounts for part of the activity of the 'animal protein factor', there is considerable confusion concerning its value as a 'feed additive' because of major differences in the basal ration to which it has been added in the evaluation of its possible effects. Thus appreciable positive stimulus to growth following vitamin B 12 supplementation has been recorded by Cunha et al (1950), Bowland, Beacon & McElroy (1951), Barber, Braude, Kon & Mitchell (1952), Dammers (1953) and Carpenter et al (1956) when dietary protein was of vegetable origin. Robinson et al (1952), however, failed to improve retarded growth rates by the addition of vitamin B 12 to an all vegetable ration, and, furthermore, Frens & Ubbel (1951) and Carpenter et al (1956) indicated that B 12 fortified vegetable rations were inferior to those including fish meal.…”

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confidence: 77%

Growth, economy of feed utilization and carcass quality in pigs in relation to dietary protein level and antibiotic administration

et al. 1959

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“…Vohs, Maddock, Catron & Culbertson, 1951;Catron, Jensen & Maddock, 1951;Catron, Jensen, Homeyer, Maddock & Ashton 1952;Jensen, Ashton, Maddock, Homeyer & Catron, 1952;Barber, Braude, Kon & Mitchell, 1953). Bowland, Beacom & McElroy (1951), however, found animals treated with antibiotic to have lower carcass scores than the control animals, due to a reduction in length and increase in back fat. This was accompanied by increased dressing percentages.…”

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The effect of antibiotic dietary supplements on the carcass measurements and dressing percentage of bacon pigs

Harrington

Taylor

1955

J. Agric. Sci.

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1. Certain carcass measurements (length, shoulder and mid-back fats, belly thickness and dressing percentage) made on a total of 402 bacon pigs from four antibiotic feeding trials have been analysed.2. The length of the carcasses showed more variation between pens treated with various doses of penicillin than between control pens or pens treated with aureomycin. This greater variation in length was related to the greater variation in growth rate between the penicillin treatments. No differences in the mean lengths of control, penicillin and aureomycin treatments were found.3. Back fat measurements and belly thickness showed no differences between aureomycin, penicillin and control treatments in overall tests.4. Aureomycin consistently gave higher dressing percentages than penicillin. Animal protein also gave higher dressing percentages than vegetable protein, but no effect of vitamin B12 on this quantity was found.

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Animal Protein Factor and Antibiotic Supplementation of Small Grain Rations for Swine

Cited by 13 publications

References 0 publications

The growth of pigs kept to one level of feeding, in two environments, and fed diets with and without an antibiotic

The growth of pigs kept to one level of feeding, in two environments, and fed diets with and without an antibiotic

Growth, economy of feed utilization and carcass quality in pigs in relation to dietary protein level and antibiotic administration

The effect of antibiotic dietary supplements on the carcass measurements and dressing percentage of bacon pigs

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