Ultra-violet irradiation of fattening pigs

Walker-Love, J.; Laird, R.; Thomson, Jennifer M.; Gray, Kerry

doi:10.1017/s0003356100033146

Anim. Sci.

1959

DOI: 10.1017/s0003356100033146

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Ultra-violet irradiation of fattening pigs

J. Walker-Love

R. Laird

Jennifer M. Thomson

et al.

Abstract: 1. Ninety-six Large White fattening pigs, 8-10 weeks old at the beginning of the trial were used to study the effects of ultra-violet irradiation (22½ hours daily) with and without oxytetracycline supplements of the diet. All meal fed was fortified with vitamin D.2. Under the conditions of this trial ultra-violet irradiation was without effect. Oxytetracycline supplementation resulted in significantly higher live-weight increases, lower age at slaughter and improved feed conversion.3. No significant treatment … Show more

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“…The procedure adopted and the measurements taken were the same as those described by Walker-Love et al (1959). The procedure adopted and the measurements taken were the same as those described by Walker-Love et al (1959).…”

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A comparison of cubes and meal for growing and fattening pigs

Laird

Robertson

1963

Anim. Sci.

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IT was recently demonstrated in Britain that for piglets the pelleting of creep feed increased food consumption although the growth rate was unaffected (Braude, Townsend and Rowell, 1960). For bacon or pork pigs, however, the published information concerning the value of pelleted feeds originated in the United States or Canada, where it was found that growth rate and food conversion were both improved by pelleting (Schneider and Brugman, 1950;Lehrer and Keith, 1953; Dinusson et ah, 1953;Thomas and Flower, 1953; and later investigators).As no British work on the bacon pig had been published, and since North American ad lib. outdoor feeding systems are not practised in Britain to any appreciable extent, the trial reported here was undertaken with the object of assessing whether cubed feed was advantageous for British bacon pig production. EXPERIMENTALHousing. The house used in this experiment was a lean-to building, 45 x 17 ft. with double cavity brick walls and a false ceiling of polystyrene. There were six pens, with individual feeders, each pen holding four pigs. The house was heated by six 375-watt infra-red heaters, one over each pen, and ventilation was by three air inlets, 3 ft. by 6 in., and two six-inch fans. The heater and fans were thermostatically controlled to give a temperature within the range 60-65° F. The actual mean daily maximum and minimum temperatures were 65-3° F. and 60-3° F. respectively.Pigs. The experiment comprised three replicates, hereafter designated I, II and III. Purebred Large White weaner pigs, aged 8-9 weeks, were used, there being 36 pigs of which 22 were hogs and 14 gilts. Each replicate consisted of three pens each of four pigs from the same litter. For replicate I, the pigs were selected from three litters, for replicate II, from two litters, and for replicate III, from three litters. Replicates I, II and III were started on 19th February 1960, 3rd February 1961, and 14th April 1961 respectively.There were three treatments, viz. cubes, ground cubes and meal. Since there were four pigs per pen, one of the treatments was duplicated in each pen. The duplicate treatment was allocated to the pens at random and the pigs were allocated treatments and individual feeders randomly. To allow the pigs to become accustomed to the accommodation and feeding arrangements, they all received the same ration for about 10 days before the experimental rations were offered.Feeding. The composition of the rations and the periods during which they were given are shown in Tables 1 and 2. In replicate III, because of shortage of the treatment rations, all pigs were put on to the same meal ration, D, when they reached 175 lb. live-weight. G 97

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A comparison of cubes and meal for growing and fattening pigs

Laird

Robertson

1963

Anim. Sci.

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Lack of response by growing-finishing pigs to germicidal ultraviolet radiation

Morrison¹,

Hintz²,

Givens³

1967

J. Agric. Sci.

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Ultra-violet irradiation of fattening pigs

Cited by 2 publications

References 4 publications

A comparison of cubes and meal for growing and fattening pigs

A comparison of cubes and meal for growing and fattening pigs

Lack of response by growing-finishing pigs to germicidal ultraviolet radiation

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