Animal Bioscience

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Amino acid digestibility in diets containing copra meal with β-mannanase fed to growing pigs

  • Jang, Jae Cheol (Department of Agricultural Biotechnology, and Research Institute of Agriculture and Life Sciences, Seoul National University) ;
  • Kim, Dong Hyuk (Department of Agricultural Biotechnology, and Research Institute of Agriculture and Life Sciences, Seoul National University) ;
  • Jang, Young Dal (Department of Agricultural Biotechnology, and Research Institute of Agriculture and Life Sciences, Seoul National University) ;
  • Kim, Yoo Yong (Department of Agricultural Biotechnology, and Research Institute of Agriculture and Life Sciences, Seoul National University)
  • Received : 2021.01.10
  • Accepted : 2021.03.09
  • Published : 2021.12.01
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Abstract

Objective: The objective of this study was to estimate standardized ileal digestibility (SID) of amino acids (AA) in growing pigs fed diets containing increasing levels of copra meal (CM) with β-mannanase supplementation. Methods: Twenty barrows (initial body weight: 34.43±0.11 kg) surgically fitted with T-cannulas at the distal ileum were individually housed in metabolism crates. Pigs were allotted to 5 dietary treatments in a completely randomized design with 4 replicates per treatment. The dietary treatments were: i) NC, negative control, corn-soybean meal (SBM) based diet, ii) PC, positive control, basal diet + 0.10% β-mannanase supplementation (800 IU/kg), iii) CM6, PC diet with 6% CM supplementation, iv) CM12, PC diet with 12% CM supplementation, and v) CM18, PC diet with 18% CM supplementation. A nitrogen-free diet was used to estimate basal endogenous losses of AA for SID calculation. All experimental diets contained 0.5% chromic oxide as an indigestible marker. Each period consisted of a 4-d diet adaptation period and a 3-d ileal digesta collection period. Results: There were no differences in apparent ileal digestibility (AID) and SID of all AA between the NC and PC treatments except that the PC treatment had lower AID and SID of glycine than the NC treatment (p<0.05). There were linear decreases in AID and SID of lysine (p<0.05) and aspartic acid (p = 0.06; tendency) with increasing levels of CM in the diets with β-mannanase. Conclusion: The β-mannanase supplementation had no effect on AA digestibility in pigs fed the corn-SBM based diet but increasing levels of CM reduced SID of lysine and aspartic acid.

Keywords

Acknowledgement

The present manuscript is based on research supported by Rural Development Administration (Republic of Korea; 500-20180039).

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