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Effects of organic and inorganic zinc sources on production, composition and zinc concentration of milk in early lactating Holstein cows

Published online by Cambridge University Press:  22 November 2017

S Sobhanirad ,
R Valizadeh ,
F Azizi ,
A Nasserian ,
M Hedayati  and
A Tahmasebi
S Sobhanirad*
Affiliation:
Ferdowsi University of Mashhad, Mashhad, Islamic Republic of Iran
R Valizadeh
Affiliation:
Ferdowsi University of Mashhad, Mashhad, Islamic Republic of Iran
F Azizi
Affiliation:
Ferdowsi University of Mashhad, Mashhad, Islamic Republic of Iran
A Nasserian
Affiliation:
Ferdowsi University of Mashhad, Mashhad, Islamic Republic of Iran
M Hedayati
Affiliation:
Ferdowsi University of Mashhad, Mashhad, Islamic Republic of Iran
A Tahmasebi
Affiliation:
Ferdowsi University of Mashhad, Mashhad, Islamic Republic of Iran
*
Email: ssobhani2002@yahoo.com
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Extract

Zinc (Zn) is an essential nutrient for animals, functioning largely or entirely in enzyme systems and being involved in protein synthesis, carbohydrate metabolism, and many other biochemical reactions (Miller, 1970). This element is important in maintenance of health and integrity of epithelial tissue, such as skin (teats) and mammary tissue, because of its role in cell division and protein synthesis (Cook-Mills and Fraker, 1993). The most widely used products for zinc supplementation are zinc oxide, zinc sulphate and zinc methionine. Knowledge of organic Zn compounds is still incomplete. In particular, there is a lack of reports on the effect of such compounds in roughage based diets and only a limited number of studies have investigated the importance of Zn methionine in dairy cattle. Some research suggest that supplementing certain organic forms of zinc improve animal-production responses compared with those observed in ruminants that are supplemented with inorganic zinc (Spears, 1996). Therefore, the present study was conducted to compare organic and inorganic zinc supplements effects on production and components of milk. A second objective was to determine effects of different zinc sources on zinc concentration of milk.

Type
Theatre Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2009 , April 2009 , pp. 158
Copyright
Copyright © The British Society of Animal Science 2009

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References

Cook-Mills, J. M., and Fraker, P. J. 1993. Cunningham-Rundles (Ed.). Dekker, New York, NY.Google Scholar
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