The Influence of Supplementation of Different Forms of Zinc in Goats on the Zinc Concentration in Blood Plasma and Milk

Pechová, Alena; Mišurová, Ľ.; Pavlata, L.; Dvořák, R.

doi:10.1007/s12011-009-8389-7

Cited by 17 publications

(9 citation statements)

References 31 publications

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“…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%

“…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. In our study, the Zn concentration in the milk of ewes fed 30 ppm additional Zn was consistently higher than that of animals fed lower Zn levels, but progressively increasing Zn levels in milk were not observed when the lower levels of Zn were consumed.…”

Section: Discussionmentioning

confidence: 82%

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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: 87%

Section: Discussionmentioning

confidence: 82%

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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“…Likewise, Pechova et al. () reported that while supplementing different forms of Zn in goats during a short‐term, Zn concentration in plasma increased significantly in all administered groups, however, that in control group was unchanged. Due to homoeostatic mechanisms, supplemental Zn in diet would not increased plasma Zn concentration when Zn is adequate.…”

Section: Discussionmentioning

confidence: 85%

Influence of different dietary zinc levels on cashmere growth, plasma testosterone level and zinc status in male Liaoning Cashmere goats

Liu

Sun

Yang

et al. 2015

Animal Physiology Nutrition

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The experiment was conducted to investigate the influence of different levels of zinc (Zn) on cashmere growth, plasma testosterone and Zn profile in male Cashmere goats. Twenty-eight male Liaoning Cashmere goats, 3 years old and body weight at 56.2 ± 2.45 kg, were assigned to four groups. The animals were fed a basal diet containing of 45.9 mg Zn/kg dry matter (DM) basis and supplemented with 0, 20, 40 or 80 mg Zn (reagent grade ZnSO₄ ·7H₂ O) per kg DM for 90 days. There was no significant effect on growth and diameter of cashmere fibre for Zn supplemented in diets. However, the length and growth rate of wool were improved (p < 0.05) with dietary Zn. The length and growth rate of wool were higher (p < 0.05) for the groups supplemented with 40 or 80 mg Zn/kg DM compared with that of 20 mg Zn/kg DM treatment group. Plasma testosterone concentration was increased for Zn supplemented in diets, and the testosterone concentration was higher (p < 0.05) in goats fed on the diet supplemented with 40 or 80 mg Zn/kg DM compared with those fed on basal diet. Plasma Zn concentrations increased (p < 0.05) with increasing dietary Zn and supplemented with 40 and 80 mg Zn/kg DM groups improved plasma Zn concentration (p < 0.05) more than 20 mg Zn/kg DM group. Fibre Zn content was higher (p < 0.05) in groups supplemented with 40 or 80 mg Zn/kg DM compared with control group, but no difference between Zn-supplemented groups (p > 0.05). The activity of plasma alkaline phosphatase was increased (p < 0.05) due to dietary Zn supplementation; however, no difference was found between supplemented treatment groups (p > 0.05). In conclusion, Zn content (45.9 mg Zn/kg DM) in control diet was insufficient for optimal wool growth performance, and we recommended the level of dietary Zn for such goats is 86 mg/kg DM during the breeding season and cashmere fibre growing period.

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“…As stated in an opinion of the FEEDAP Panel (EFSA FEEDAP Panel, 2014), "with the exceptions of liver and kidney (Eisemann et al, 1979;Jenkins and Hidiroglou, 1991;Cao et al, 2000;Gallaher et al, 2000;Wright and Spears, 2004;NRC, 2005; see also review of Schlegel et al, 2013), zinc concentrations exceeding the requirements up to about 200 mg/kg feed will not result in a change of zinc concentrations in animal tissues and other products including milk (Schwarz and Kirchgessner, 1975;Miller et al, 1989;Wiking et al, 2008;Peters and Mahan, 2008;Peters et al, 2010)". This is supported by studies on zinc deposition in eggs (Mabe et al, 2003;Huyghebaert et al, 2006;Plaimast et al, 2008;Bahakaim et al, 2014) and milk (Kirchgessner et al, 1994;Pechova et al, 2006Pechova et al, , 2009 carried out on animals fed diets supplemented with sources of amino acid chelated with this trace element. This is supported by studies on zinc deposition in eggs (Mabe et al, 2003;Huyghebaert et al, 2006;Plaimast et al, 2008;Bahakaim et al, 2014) and milk (Kirchgessner et al, 1994;Pechova et al, 2006Pechova et al, , 2009 carried out on animals fed diets supplemented with sources of amino acid chelated with this trace element.…”

Section: Metabolic and Residue Studiesmentioning

confidence: 88%

Scientific Opinion on the safety and efficacy of zinc chelate of L‐lysinate‐HCl as feed additive for all animal species

Högstrand¹

2015

EFS2

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Zinc chelate of L-lysinate-HCl for all animal species, provided as powder and granulate, is intended for use as zinc compound in animal nutrition. Tolerance studies with calves and weaned piglets allowed the Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) to conclude that zinc chelate of L-lysinate-HCl is a safe source of zinc for all animal species, provided that the maximum zinc contents authorised in complete feed are respected. The supplementation of feeds with zinc from zinc chelate of L-lysinate-HCl up to the maximum authorised zinc levels is not expected to result in a different zinc deposition in edible tissues/products than the standard inorganic source zinc sulphate heptahydrate. No concerns for consumer safety will arise from the use of the additive in animal nutrition. Zinc chelate of L-lysinate-HCl in the powder form poses a risk to users by inhalation, whilst for the granulate form that risk is minimised. Neither form, powder or granulate, is a dermal irritant; however, both forms are irritant to the eye. In the absence of specific information, the additive should be regarded as a potential skin sensitiser. Zinc chelate of L-lysinate-HCl is intended to be a substitute for other authorised zinc additives. It will therefore not further increase the environmental burden of zinc. Based on a study on weaned piglets, the FEEDAP Panel concluded that zinc chelate of L-lysinate-HCl is efficacious as a source of zinc in meeting the requirements of all animal species. The Panel made some recommendations regarding the Description and Conditions of use of the additive.

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The Influence of Supplementation of Different Forms of Zinc in Goats on the Zinc Concentration in Blood Plasma and Milk

Cited by 17 publications

References 31 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

Influence of different dietary zinc levels on cashmere growth, plasma testosterone level and zinc status in male Liaoning Cashmere goats

Scientific Opinion on the safety and efficacy of zinc chelate of L‐lysinate‐HCl as feed additive for all animal species

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