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EFFECTS OF CALCIUM SALTS OF LONG-CHAIN FATTY ACIDS ON RUMINAL DIGESTIBILITY, MICROBIAL PROTEIN YIELD AND LACTATION PERFORMANCE

  • Maeng, W.J. (Animal Resources Research Center, Kon-Kuk University) ;
  • Lim, J.H. (Animal Resources Research Center, College of Animal Husbandry Kon-Kuk University) ;
  • Lee, S.R. (Animal Resources Research Center, College of Animal Husbandry Kon-Kuk University)
  • Received : 1992.06.29
  • Accepted : 1993.05.31
  • Published : 1993.09.01

Abstract

Four sheep per treatment were fed either control or 3% calcium salts of long-chain fatty acids (Ca-LCFA) in a total mixed ration (TMR). Feed and free water intakes were not different, but digestibilities of crude protein and crude fiber were lower (p<0.05) and that of crude fat was higher (p<0.05) for sheep fed Ca-LCFA than for control sheep. Dry matter digestibility, ruminal pH and microbial protein yield were not different between treatments and ammonia-N concentration in the rumen was higher for sheep fed Ca-LCFA than for control sheep. A 60-day milk production trial was conducted with thirty lactation Holstein cows. Fifteen cows per treatment were fed TMR containing either control or 3% Ca-LCFA ad libitum. Feed intake was not different between treatments, but milk yield was significantly higher (p<0.05) for cows fed Ca-LCFA than for control cows. Milk fat percentage was slightly higher and milk protein was lower for cows fed Ca-LCFA than for control cows. Lactose and total solid contents in milk were not different between treatments.

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  1. Effect of feeding complete feed block containing rumen protected protein, non-protein nitrogen and rumen protected fat on improving body condition and carcass traits of cull ewes vol.101, pp.6, 2017, https://doi.org/10.1111/jpn.12628