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Effects of Dietary Supplementation of Conjugated Linoleic Acid (CLA) on Piglets' Growth and Reproductive Performance in Sows

  • Park, J.C. (Swine Science Division, National Livestock Research Institute, RDA) ;
  • Kim, Y.H. (Swine Science Division, National Livestock Research Institute, RDA) ;
  • Jung, H.J. (Swine Science Division, National Livestock Research Institute, RDA) ;
  • Moon, H.K. (Swine Science Division, National Livestock Research Institute, RDA) ;
  • Kwon, O.S. (Swine Science Division, National Livestock Research Institute, RDA) ;
  • Lee, B.D. (Department of Animal Science, College of Agriculture and Life Sciences, Chungnam National University)
  • Received : 2004.07.17
  • Accepted : 2004.10.16
  • Published : 2005.02.01

Abstract

The objective of this study was to investigate effects of dietary level of CLA and the duration of feeding CLAcontaining diets on reproductive performance in sows and piglet growth rate. Tallow (3% in gestation diet and 5% in lactation diet, respectively) was incorporated as a fat source in control diet, and each 50% (dietary CLA level of 0.75% in gestation diet, and 1.50% in lactation diet, respectively) or 100% (dietary CLA level of 1.50% in gestation diet, and 2.50% in lactation diet, respectively) of tallow was replaced by a commercial CLA preparation containing 50% CLA isomers. Diets containing CLA were fed either from d 15 premating to weaning or d 74 post-mating to weaning. The level of dietary CLA and feeding duration did not affect litter size. High dietary level of CLA, however, decreased piglet weights at birth (p<0.01) and tended to decrease backfat thickness of sows at weaning. Longterm feeding of CLA-containing diets decreased piglet weights at weaning (p<0.05) and backfat thickness of sows at weaning (p<0.05). CLA supplemented in sow diet was transferred to fetus and piglets during pregnancy and nursing period, respectively. CLA contents of femoral muscle of piglets were 2.08 to 2.57 mg per g of fat at birth, and 2.36 to 4.47 mg at 10 days of age in CLA groups, while CLA was not detected in the control group. In conclusion, dietary supplementation of CLA tended to lower backfat thickness of sow and piglets' weight at birth or weaning, but did not affect total litter size. Dietary CLA was transferred efficiently during prenatal and postnatal periods of time through the placenta and milk, respectively.

Keywords

Conjugated Linoleic Acid;Sow's Reproductive Performance;Piglet Growth

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