Effect of different dietary energy levels on the reproductive performance of Kivircik sheep under a semi-intensive system in the South-Marmara region of Turkey

M. Koyuncu; O. Canbolat

doi:10.22358/jafs/66436/2009

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About the Journal Editorial Office Editorial Board Copy right and self-archiving policy Peer review process Instructions for Reviewers Printed version subscription Abstracting and indexing Contact

Instructions for Authors

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ORIGINAL PAPER

Effect of different dietary energy levels on the reproductive performance of Kivircik sheep under a semi-intensive system in the South-Marmara region of Turkey

M. Koyuncu ¹

O. Canbolat ¹

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University of Uludag, Faculty of Agriculture, Department of Animal Science, 16059 Bursa, Turkey

Publication date: 2009-11-06

Corresponding author

M. Koyuncu

University of Uludag, Faculty of Agriculture, Department of Animal Science, 16059 Bursa, Turkey

J. Anim. Feed Sci. 2009;18(4):620-627

DOI: https://doi.org/10.22358/jafs/66436/2009

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Citations (16)

KEYWORDS

sheep

energy

reproduction

ABSTRACT

The objective of the study was to determine the effects of four dietary energy levels (L₁ - 10.3, L₂ - 11.0, L₃ - 11.6 and L₄ - 12.2 MJ ME per kg DM) on oestrus synchronization and fertility in Kivircik ewes. Eighty Kivircik ewes were randomly allocated in equal numbers to the four dietary energy treatments. The groups were treated with intra vaginal sponges containing 40 mg FGA (fluorogestone acetate) for a period of 14 days and 500 IU pregnant mare serum gonadotropin was injected intramuscularly after sponge withdrawal. The proportion of ewes exhibiting overt oestrus within 96 h after the injection was significantly lower (P<0.05) in the L₁ and L₂ eves (86 and 89 %) than in those on the L₃ (100%) and L₄ (100%) treatments, respectively. Mean litter size and fecundity were higher (P<0.05) in the L₃ (1.95) and L₄ (2.05) compared with the L₁ (1.45 and 1.25) and L₂ (1.63 and 1.55) ewes. It is concluded that short-term (21 days) in the level of dietary energy supplementation pre-mating can have a beneficial effect on reproductive performance in ewes.

CITATIONS (16):

Age at puberty and fertility of Rahmani sheep fed on biological inoculated corn silage
E.I. Khalifa, M.E. Ahmed, Y.H. Hafez, O.A. El-Zolaky, K.M. Bahera, A.A. Abido
Annals of Agricultural Sciences