Factors Affecting the Need for Supplementary Vitamins in Pigs

Frape, D. L.

doi:10.1016/b978-0-407-00339-2.50013-3

Recent Developments in Pig Nutrition 1985

DOI: 10.1016/b978-0-407-00339-2.50013-3

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Factors Affecting the Need for Supplementary Vitamins in Pigs

D. L. Frape

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1990

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“…Nevertheless, folates from the diet are likely to be the main relia- (Ek and Magnus, 1980;Ford et al, 1983). The stability of the vitamin in premixes or feeds is not well documented (Wornick, 1968) but it is known that pelleting of diets reduces the high levels of folic acid naturally present in lucerne meal (Frape, 1985 (1986). Preparation of samples before the assay was carried out according to a method adapted from Cerna and Kas (1983).…”

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confidence: 99%

Effects of intramuscular injections of folic acid on serum folates, haematological status and growth performance of growing-finishing pigs

Matte¹,

Girard²,

Bilodeau³

et al. 1990

Reprod. Nutr. Dévelop.

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Summary ― In a first trial, 48 piglets aged 5 weeks, grouped into 6 blocks of 8 pigs each, were used to determine the effect of intramuscular injections of folic acid on serum folates, haematological status, growth performance and carcass characteristics. Each block consisted of 2 pens of 4 pigs; in one pen, pigs received, by weekly intramuscular injections, an increasing volume of a solution containing 5 mg/ml folic acid, while in the other the animals were non-injected controls. The concentration of serum folates in treated pigs was 19% higher (P = 0.005) than in controls. There was no effect of treatment (P >_ 0.29) on haemoglobin and haematocrit. During the starting period, (5-11 weeks) average daily gain was not influenced by folic acid injections but feed intake and feed conversion were decreased (P = 0.07 and P = 0.05 respectively). No effect of folic acid (P >_ 0.23) was noted from 11-23 weeks of age, suggesting that the supplement was suboptimal during the growing-finishing period. In a second trial, 72 piglets aged 9 weeks were assigned to 6 blocks of 12 2 animals each. The following treatments were randomly distributed in each block according to a 2 x 3 factorial design: level of feeding (restricted vs ad libitum) and weekly intramuscular injections of increasing volume of solutions containing either 0, 15 or 30 mg/ml of folic acid. The variables studied were the same as in Trial 1. Concentrations of serum folates varied quadratically (P= 0.0001) with the dose injected, a plateau being attained with injections of 15 mg/ml. There was no effect of treatment (P = 0.043) on haemoglobin and haematocrit. During the growing period (9-15 weeks), no effect (P 0.72) of folic acid was noted on growth performance. However, during the finishing period (15-21 weeks), folic acid given at a dose of 30 mg/ml decreased (P = 0.006) feed intake while no effect (P 0.13) of the vitamin supplementation was noted on average daily gain and feed conversion. In both trials, there was no effect (P 0.21)

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mentioning

confidence: 99%

Effects of intramuscular injections of folic acid on serum folates, haematological status and growth performance of growing-finishing pigs

Matte¹,

Girard²,

Bilodeau³

et al. 1990

Reprod. Nutr. Dévelop.

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Factors Affecting the Need for Supplementary Vitamins in Pigs

Cited by 1 publication

References 26 publications

Effects of intramuscular injections of folic acid on serum folates, haematological status and growth performance of growing-finishing pigs

Effects of intramuscular injections of folic acid on serum folates, haematological status and growth performance of growing-finishing pigs

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