The effect of feeding flacked or granulated fat supplement containing lecithin or bile powder on the production performance and source of milk fatty acids in Holstein dairy cows

Articles in Press

Document Type : Research Paper

Authors

1 Department of Animal Science, Faculty of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

2 Department of Animal Sciences, Faculty of Agriculture, Urmia University, Urmia, Iran

Abstract

This research aims to investigate the effect of a feeding fat supplement containing an additive (lecithin or bile powder) with the physical form of flake or granule on the apparent digestibility of nutrients and some blood parameters in Holstein dairy cows. 48 lactating cows were used during two experimental periods in a 2x3x2 completely randomized factorial design and randomly grouped into 6 experimental treatments: 1. Control diet + 2.5% granulated fat supplement, 2. Control diet + 2.5% granulated fat supplement containing 5% lecithin 3. Control diet + 2.5% granulated fat supplement containing 5% bile powder 4. Control diet + 2.5% Flaked fat supplement 5. Control diet + 2.5% Flaked fat supplement containing 5% lecithin and 6. Control diet + 2.5% Flaked fat supplement containing 5% bile powder. All the experimental diets were balanced according to the recommendations of the National Research Association. All data were analyzed by statistical software. The addition of lecithin or bile powder average milk production, ECM, 3.5% FCM, milk fat, protein, lactose, solids, solids nonfat, SCC, denovo fatty acids, mixed fatty acids, preformed fatty acids, saturated fatty acids, unsaturated fatty acids, mono unsaturated fatty acids, poly unsaturated fatty acids, stearic acid, palmitic acid and oleic acid (P ≥ 0.05). The addition of emulsifiers to the fat supplement of the high-production dairy cow diet may have positive effects on the production performance, milk compositions and source of fatty acids.

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Main Subjects

Iranian Journal of animal Science

Articles in Press, Accepted Manuscript
Available Online from 10 July 2024

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History

  • Receive Date: 24 February 2024
  • Revise Date: 29 June 2024
  • Accept Date: 03 July 2024

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