Effects of dietary substitution of trace mineral supplements for organic chelates on the performance of fattening lambs (Afshari-Romanov)

Document Type : Scientific-Extensional Article

Authors

1 M.Sc. Student of Animal Nutrition, Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Alborz, Iran

2 Associate Professor of Animal Nutrition, Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Alborz, Iran

3 Professor of Animal Nutrition, Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Alborz, Iran

4 Ph.D. Student of Animal Nutrition, Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Alborz, Iran

Abstract

This experiment was carried out in order to evaluate the effects of replacing mineral supplements with organic chelates on the performance of fattening lambs (Afshari-Romanov). Twenty-four Afshari-Romanov male lambs were utilised in a completely randomized design. The dietary treatments include 1- control diet with typical mineral and vitamin supplement, 2- basal diet plus Hepta mix (50% typical supplement and 50% Hepta Mix supplement) at 2.5% of concentrate (organic zinc, organic copper, organic manganese, organic chromium, organic selenium, organic iron, organic cobalt), and 3- basal diet with Hepta mix supplement at 5% of concentrate (organic zinc, organic copper, organic manganese, organic chromium, organic selenium, organic iron, organic cobalt). The whole experiment lasted 100 days which included 90 days of the experimental period and 10 days of adaptation period. The collected data consisted of dry matter intake (DMI), average daily gain (ADG), feed conversion ratio (FCR), and blood parameters, which were collected individually from animals in the last week of the fattening period and stored for further analysis. All data were analyzed using SAS software. There was no significant difference between the experimental treatments in terms of the apparent digestibility of the nutrients (P<0.05). Among blood parameters, glucose, alkaline phosphatase cholesterol, triglyceride, and total protein were similar and remained unchanged among treatments. Totally, these consequences reveal that applied trace mineral supplements at 2.5 and 5% of concentrate (on a DM basis) may be used in the diet of male fattening lambs without adverse effects on animal performance.

Keywords

References

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