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Effect of sainfoin and forage:concentrate ratio on nitrogen balance, biohydrogenation and milk fatty acid profile in dairy ewes

Document Type : Research Paper

Authors

1 Ph.D. Student, Department of Animal Science, Faculty of Animal and Food Science, Ramin Agricultural and Natural Resources University of Khouzestan

2 Associate Professors, Department of Animal Science, Faculty of Animal and Food Science,Ramin Agricultural and Natural ResourcesUniversity of Khouzestan

3 Assistant Professor, Department of Animal Nutrition, Animal Sciences Research Institute, Karaj, Iran.

Abstract

This experiment was carried out the aim of the effect of sainfoin forage and forage:concentrate ratios on feed intake, nitrogen balance,ruminal biohydrogenation and milk fatty acid profile in dairy ewes using of eight Lori breed ewes according to a replicated 4 × 4 Latin square design. Treatments were adjusted from one to four according to forage:concentrate ratios of 35:65 with and without sainfoin and  65:35 with and without sainfoin. Dry matter intake was not significant among experimental diets. Retention of N was higher in ewes that receiveddiets consist of forage:concentrate ratios of 35:65 with sainfoin and  65:35 with and without sainfoin (P<0.05). The high concentrate diet with sainfoinwas the most vaccenic acid concentration accompanied by the less concentrations of stearic acid in ruminal liquor (P<0.05).  Apparently biohydrogenation ofhigh concentrate diet with sainfoin (treatment one) decreased for oleic, linoleic and linolenic acid with 10.2, 12.3­and ­7.1%, respectively (P<0.05). Experimental diets effect were significant on vaccenic acid, conjugated linoleic acid, linoleic acid and linolenic acidconcentrationsin milk fat (P<0.05).In base onobtained the results,feeding of  dairy ewes with high concentrate diets  consist of sainfoin forage were an important due to  increased conjugated linoleic acid and vaccenic acid concentration in milk fat.

Keywords

References
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Animal Production
Volume 18, Issue 3
October 2016
Pages 447-459
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