Journal of Animal Science and Technology

Korean Society of Animal Sciences and Technology (한국축산학회)
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Effect of feeding a by-product feed-based silage on nutrients intake, apparent digestibility, and nitrogen balance in sheep

  • Seok, J.S. (HRC, Division of Food Biosciences, College of Health and Medical Life Sciences, Konkuk University) ;
  • Kim, Y.I. (HRC, Division of Food Biosciences, College of Health and Medical Life Sciences, Konkuk University) ;
  • Lee, Y.H. (HRC, Division of Food Biosciences, College of Health and Medical Life Sciences, Konkuk University) ;
  • Choi, D.Y. (HRC, Division of Food Biosciences, College of Health and Medical Life Sciences, Konkuk University) ;
  • Kwak, W.S. (HRC, Division of Food Biosciences, College of Health and Medical Life Sciences, Konkuk University)
  • Received : 2015.06.04
  • Accepted : 2016.01.25
  • Published : 2016.02.29
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Abstract

Background: Literature is lacking on the effects of feeding by-product feed (BF)-based silage on rumen fermentation parameters, nutrient digestion and nitrogen (N) retention in sheep. Therefore, this study was conducted to determine the effect of replacing rye straw with BF-based silage as a roughage source on ruminal parameters, total-tract apparent nutrient digestibility, and N balance in sheep. Methods: The by-product feed silage was composed of spent mushroom substrate (SMS) (45 %), recycled poultry bedding (RPB) (21 %), rye straw (11 %), rice bran (10.8 %), corn taffy residue (10 %), protected fat (1.0 %), bentonite (0.6 %), and mixed microbial additive (0.6 %). Six sheep were assigned randomly to either the control (concentrate mix + rye straw) or a treatment diet (concentrate mix + BF-based silage). Results: Compared with the control diet, feeding a BF-based silage diet resulted in similar ruminal characteristics (pH, acetate, propionate, and butyrate concentrations, and acetate: propionate ratio), higher (p < 0.05) ruminal NH3-N, higher (p < 0.05) ether extract digestibility, similar crude protein digestibility, lower (p < 0.05) dry matter, fiber, and crude ash digestibilities, and higher (p < 0.05) N retention (g/d) Conclusion: The BF-based silage showed similar energy value, higher protein metabolism and utilization, and lower fiber digestion in sheep compared to the control diet containing rye straw.

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References

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