Influence of High Levels of Dietary Zinc on Zinc in Milk, Performance and Biochemistry of Lactating Cows

Miller, W.J.; Clifton, C.M.; Fowler, P.R.; Perkins, H. F.

doi:10.3168/jds.s0022-0302(65)88251-0

Cited by 49 publications

(20 citation statements)

References 8 publications

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“…In the present study, zinc supplement did not affect milk production. This agrees with result of Hatfield et al (2001) and Miller et al (1965), but contrasted to the results of others (Hatfield et al, 1995;Formigoni et al, 1993). Hatfield et al (1995) observed zinc supplement had positive influence on ewe milk production.…”

Section: Discussionsupporting

confidence: 90%

“…Zinc concentration was greatly increased (P < 0.01) in milk at all stages of lactation in ewes fed 0, 15 or 30 ppm Zn. The increase of concentration of zinc in milk with supplementation of zinc is consistent with the most findings in the literature (Miller et al, 1965;Hill et al, 1983;White et al, 1991) but in the latest literature, there are different results (Pechova et al, 2009;Kirhgessner et al, 1994). However, the effects of zinc supplement on the Zn concentration in milk of ewes that are kept in intensive system has not been reported.…”

Section: Discussionsupporting

confidence: 87%

“…However, the effects of zinc supplement on the Zn concentration in milk of ewes that are kept in intensive system has not been reported. Miller et al (1965) found that supplementing lactating dairy cows with 0, 500, 1000 and 2,000 ppm Zn as ZnO resulted in average milk Zn levels of 4.1, 6.7, 8.0 and 8.4 ppm, respectively. Pechova et al (2009) concluded that after 28 days of Zn supplementation, Zn concentration in milk of dairy goats was similar as at the start of the experiment in all groups.…”

Section: Discussionmentioning

confidence: 98%

“…For example, Ca, Fe and Cu are generally thought to be resistant to the influence of dietary levels (Pond et al, 1965;Underwood, 1977;Pond and Houpt, 1978), while Zn (Miller et al, 1965;White et al, 1991) and Mn (Ptumtee et al, 1956) can be increased in milk by increasing the dietary levels of the animals. High levels of supplemental Zn were also shown to have a positive influence on ewe milk production and ultimately lamb weaning weights (Hatfield et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

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Effect of zinc from zinc sulfate on trace mineral concentrations of milk in Varamini ewes

Zali

Ganjkhanlou

2009

Afr. J. Biotechnol.

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This study was conducted to evaluate the effect of feeding supplemental zinc (zinc sulfate) in different levels (15, 30, or 45 mg/kg) on trace mineral concentrations in milk of ewes. Thirty lactating Varaminni ewes were assigned to three experimental groups according to their live body weights, milk production and lambs sex in a completely randomized design. Ewes were fed a basal diet containing alfalfa, wheat straw, cottonseed meal, barley grain, wheat bran, cracked corn and vitamin-mineral supplements at 3.2% of body weight (BW) to meet NRC requirements for protein, energy and macro minerals. The basal diet contained 15 mg/kg Zn and zinc sulfate was added to the basal diet to supply 30 or 45 mg/kg of dietary zinc. Daily milk yielded was recorded at 7 days intervals and samples of the milk were taken once per week for determination of milk composition and trace mineral concentration. Concentrations of Zn, Cu, Mn and Fe in milk were determined. Dry matter intake (DMI), milk yield and milk compositions were not affected by supplemental zinc (P > 0.05). But zinc concentrations in milk were affected by supplemental zinc (P < 0.05). Other mineral concentrations were not affected by supplemental zinc (P > 0.05). It suggests that supplementation of ewes diet with zinc sulfate could be an effective way to increase zinc concentration in milk when zinc concentration of basal diets is limited for ewes in lactation period.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of zinc from zinc sulfate on trace mineral concentrations of milk in Varamini ewes

Zali

Ganjkhanlou

2009

Afr. J. Biotechnol.

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“…Some mineral elements in milk are influenced more by diet composition than are others as a result of transfer from the plasma to the mammary gland (Linzell, 1968). For example, Ca, P, Fe and Cu are generally thought to be resistant to the influence of dietary levels (Pond et al, 1965;Underwood, 1977;Pond and Houpt, 1978), while Zn (Miller et al, 1965;Earle and Stevenson, 1965) and Mn (Ptumtee et at., 1956) can be increased in milk by increasing the dietary levels of the dam. Mutch and Hurley (1974) have shown that low levels of dietary Zn influence the levels of Zn found in the milk.…”

Section: Introductionmentioning

confidence: 99%

Effect of Dietary Zinc Levels on Mineral Concentration in Milk

Hill

Miller

1983

Journal of Animal Science

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Effects of supplemental dietary Zn levels of 0, 50, 500 and 5,000 ppm on the mineral concentration in milk of first- and second-parity sows were evaluated. Colostrum from sows fed 5,000 ppm of supplemental Zn contained less Cu and P than colostrum from sows on the other treatments. Calcium was reduced in the colostrum from sows fed 0 or 5,000 ppm Zn. Copper was reduced and Zn increased in milk from sows fed the highest Zn level compared with the other treatments during wk 1, 2 and 3 of lactation. Iron was lower in the 2nd wk milk from sows supplemented with 50 ppm Zn compared with sows on the other treatments. Copper and Zn concentrations were reduced in the 1st, 2nd and 3rd wk milk from sows fed 0, 50 or 500 ppm additional Zn compared with colostrum, but only Zn was reduced in milk from sows supplemented with 5,000 ppm Zn compared with colostrum. Calcium concentrations were increased in milk for all treatments compared with colostrum, and Mg was increased in 1st, 2nd and 3rd wk milk from sows fed 0, 50 or 500 ppm Zn and in 2nd and 3rd wk milk from sows fed 5,000 ppm Zn compared with colostrum. Phosphorus was higher in 2nd wk milk from sows fed 0 or 500 ppm Zn and higher in 3rd wk milk for sows fed 0, 500 or 5,000 ppm Zn compared with colostrum. The Fe concentration in 1st wk milk from the second-parity sows was increased compared with that from the first-parity sows for all treatments. Magnesium was reduced in second-parity colostrum compared with first parity for all treatments except the unsupplemented group.

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Zinc absorption and excretion in humans and animals

Johnson

1989

Copper and Zinc in Inflammation

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Influence of High Levels of Dietary Zinc on Zinc in Milk, Performance and Biochemistry of Lactating Cows

Cited by 49 publications

References 8 publications

Effect of zinc from zinc sulfate on trace mineral concentrations of milk in Varamini ewes

Effect of zinc from zinc sulfate on trace mineral concentrations of milk in Varamini ewes

Effect of Dietary Zinc Levels on Mineral Concentration in Milk

Zinc absorption and excretion in humans and animals

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