Effect of Supplemental Vitamin A on the Performance of Beef Cows and Their Calves

Tn, Meacham; Kp, Bovard; Bm, Priode; Jp, Fontenot

doi:10.2527/jas1970.312428x

Cited by 8 publications

(3 citation statements)

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“…In early lactation, the ewe's nutrient requirements increase dramatically, particularly for ewes nursing twin or triplet lambs (Pope et al, 1949). Supplementation of carotene to ruminant during lactation was essential for normal vitamin A nutrition regardless of whether the animals had low or high liver vitamin A stores at parturition (Meacham et al, 1970). Requirements of vitamin A of animal have been recommended for various productivities (e.g., NRC).…”

Section: Introductionmentioning

confidence: 99%

Effects of Vitamin A on Growth Performance, Antioxidant Status and Blood Constituents in Lactating Grey Goat

Yang¹,

Wang²,

Jing³

et al. 2010

American Journal of Animal and Veterinary Sciences

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Problem statement: It is regarded that vitamin A protects cells from damage by radicals which are believed to contribute to certain chronic diseases and regulates immune function of animals by protection of mucosal epithelium acting as the first defense barrier. All these properties of vitamin A may be attributable to its antioxidant activity. This study was to evaluate the effects of different levels of vitamin A on growth performance, antioxidant status and blood constituents of lactating ewes. Approach: Thirty-two multiparous lactating ewes of Grey goat (BW = 35.1 ± 1.1 kg) were divided into four groups of eight with four different supplementing levels of vitamin A (0, 2000, 3000 and 5000 IU kg −1 DM). Ewes were fed in individual lot at ad libitum intake and had free access to water. Average daily feed intake and average milk yield of ewes were measured weekly.

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Section: Introductionmentioning

confidence: 99%

Effects of Vitamin A on Growth Performance, Antioxidant Status and Blood Constituents in Lactating Grey Goat

Yang¹,

Wang²,

Jing³

et al. 2010

American Journal of Animal and Veterinary Sciences

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“…The next consideration in the development of the slow vitamin A release theory is the large variation in published results on the length of time for half the liver vitamin A to be released. Findings range from 28 to 184 days (Frey and Jensen, 1947;Church et aL, 1956;Hayes et al, 1966Hayes et al, , 1967Sewell et al, 1966;Swanson et al, 1968;Kohlmeier and Burroughs, 1970;Meacham et al, 1970). In an experiment in which rats were given exceptionally high levels of vitamin A, Davies and Moore (1935) found that it took only a little less than 14 days for the liver to be depleted of half of its vitamin A.…”

Section: Resultsmentioning

confidence: 99%

Liver Vitamin A Slow Release Syndrome in Cattle with a Multiple Nutrient Imbalance

Hb¹

1981

Journal of Animal Science

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Data on liver vitamin A concentrations in malnourished, debilitated, down cattle in tropical, northern Australia support the hypothesis that 12% annual cattle mortality was due, in part, to a slow release of liver vitamin A. High Ca and low Zn levels in the legume forage apparently contributed to the slow release. The cattle showed marked sensitivity to sunlight and exhibited problems of sight. The malnourished yearling steers averaged 183.3 micrograms vitamin A/g wet liver vs 152.3 micrograms for steers slaughtered off good green wet season forage. Indications of a slow release of liver vitamin A were that: (1) only 4 to 7 micrograms vitamin A/g liver were in the alcohol fraction or release form; (2) after adjustments for decreases in liver and blood volume in starving animals, blood vitamin A was lowered to 18 micrograms/100 ml, which was low in relation to the adjusted liver vitamin A level of 91.7 micrograms/g, and (3) after adjustments, the liver had released only 1,667 units of vitamin A/day in the dry season, or about 1/4 of maintenance needs. The cattle were grazing a legume forage pasture containing 7.1% protein and no measurable carotene. The forage was deficient in Zn (25 ppm), which would slow the release of liver vitamin A. High Ca levels in the legume forage (.4 to .54%) in combination with low P levels (.11 to .18%) would further aggravate the low Zn level.

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“…8 Therefore, cows calving late in the winter and consuming stored forages can benefit from receiving supplemental vitamin E. 1 In addition, supplementing cows with vitamin A resulted in a reduction in calf death loss. 9 Many commercial supplements may provide vitamin A, but not enough vitamin E to meet the pregnant cow's needs. Furthermore, unlike vitamin A that is stored in the liver, there are no true vitamin E stores, thereby resulting in vitamin E deficiencies occurring more quickly than vitamin A deficiencies.…”

Section: Introductionmentioning

confidence: 99%

Effects of injectable fat-soluble vitamins and selenium on serum status in young beef calves

Dahlen

Stuart²,

Neville

2014

The Bovine Practitioner

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Crossbred beef calves (age 3 to 20 days) were used to determine effects of injectable vitamins on serum concentrations of selenium, vitamin A (retinol), and vitamin E (alpha-tocopherol). Spring-born calves were assigned to 1 of 4 treatments: (1) no treatment (Control, n=10); (2) 4 mL of a product containing selenium and vitamin E (SE, n=10); (3) 5 mL of a product containing vitamin E, vitamin A, and vitamin D (EAD, n=10); or (4) 4 mL SE and 5 mL EAD (Both, n=10). Blood samples were taken from calves immediately prior to (day 0) and 48 hours after treatment, and from their dams on day 0. Concentrations of selenium, vitamin A, and vitamin E in the dams were 112.8 ng/mL, 0.21 æg/mL, and 2.84 æg/mL, respectively. Calves administered SE (70.3 ng/mL) or Both (72.9 ng/mL) had greater (P<0.05) concentrations of selenium on day 2 compared with Control (57.2 ng/mL) or EAD (56.0 ng/mL) calves. Calves administered EAD (0.21 æg/mL) or Both (0.22 æg/mL) had greater (P<0.05) concentrations of vitamin A compared with SE (0.17 æg/mL) or Control calves (0.15 æg/mL). Calves administered EAD (13.8 æg/mL) or Both (15.0 æg/mL) had greater (P<0.05) concentrations of vitamin E compared with SE (6.2 æg/mL) or Control calves (3.4 æg/mL). Administration of injectable EAD increased serum concentration of vitamin A and vitamin E in young beef calves, whereas SE increased concentrations of selenium. Neither duration nor clinical significance of increased concentrations of vitamins and selenium were investigated.

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Effect of Supplemental Vitamin A on the Performance of Beef Cows and Their Calves

Cited by 8 publications

References 0 publications

Effects of Vitamin A on Growth Performance, Antioxidant Status and Blood Constituents in Lactating Grey Goat

Effects of Vitamin A on Growth Performance, Antioxidant Status and Blood Constituents in Lactating Grey Goat

Liver Vitamin A Slow Release Syndrome in Cattle with a Multiple Nutrient Imbalance

Effects of injectable fat-soluble vitamins and selenium on serum status in young beef calves

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