Animal Bioscience

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Additivity of digestible energy and nutrient concentrations in hatchery byproducts fed to nursery pigs

  • Sung, Jung Yeol (Department of Animal Science and Technology, Konkuk University) ;
  • Ji, Sang Yun (Animal Nutritional Physiology Team, National Institute of Animal Science, Rural Development Administration) ;
  • Kim, Beob Gyun (Department of Animal Science and Technology, Konkuk University)
  • Received : 2021.03.13
  • Accepted : 2021.06.19
  • Published : 2022.03.01
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Abstract

Objective: The objective was to test additivity of digestible energy and nutrient concentrations in the hatchery byproduct mixture fed to nursery pigs. Methods: In the previous studies, energy, phosphorus, calcium, and amino acid digestibility of infertile eggs, unhatched eggs, culled chicks, and a mixture of 3 hatchery byproduct ingredients was determined in nursery pigs (initial body weight = 9.4 to 14.2 kg). An additivity test was conducted using these determined values. Results: No difference was observed between determined and predicted metabolizable energy values in the mixture (3,998 and 3,990 kcal/kg as-is basis, respectively). Measured standardized total tract digestible phosphorus in the mixture was less than the predicted value (4.5 vs 5.3 g/kg as-is basis, respectively; p<0.05). Measured standardized total tract digestible calcium in the mixture was greater compared with the predicted value (40.0 vs 31.7 g/kg as-is basis, respectively; p<0.05). Measured standardized ileal digestible tryptophan in the mixture was greater than the predicted value (3.7 vs 3.1 g/kg as-is basis, respectively; p<0.05) whereas other amino acid values were additive. Conclusion: Energy and most of amino acid concentrations in hatchery byproducts are additive in the mixture fed to nursery pigs.

Keywords

Acknowledgement

The authors are grateful for the support of Rural Development Administration (Republic of Korea; PJ01252803). The authors also would like to thank Join Inc. (Pyeongtaek, Republic of Korea) for providing the hatchery byproducts.

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