Effects of different source of oilseeds on reproductive performance of Zell ewes

Document Type : Research Paper

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Abstract

To determine the effects of different sources of oilseeds including n-3 and n-6 fatty acids (FA) on blood metabolites, sex ratio and reproductive parameters in Zel ewes' a total of 102 ewes were assigned randomly to three diets in a completely randomized design. Diets contained either basal diet (Control), n-3 (Canola), or n-6 (roasted whole soybeans), and they were fed for 56 d. Results showed that there were no significant differences among treatments in glucose, triglyceride and LDL concentrations, but cholesterol and HDL were significantly higher in ewes fed n-3 and n-6 fatty acids compared with those control diets. Lambing rate was significantly greater in ewes fed n-3 (82.3%) and n-6 (82.3%) compared with ewes fed control diets (70.2%) but there were no significant differences between ewes fed diets n-3 and n-6. Treatments affected sex ratio of offspring (P<0.05). The proportion of male offspring was significantly higher when ewes were fed the control diet (44.1 %) compared with n-3 (32.3 %) and n-6 (35.2 %) fatty acids diets. In conclusion, feeding a source of n-3 or n-6 fatty acids can be a strategy to increase oestrus behavior and lambing rate in ewes.

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References

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Animal Sciences Journal
Volume 29, Issue 111
August 2016
Pages 35-44

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