Energy Utilization of Hatchery Waste Products by Pigs Can Be Estimated Using In vitro Data
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The objectives of this study were to determine in vitro dry matter and energy utilization ofhatchery waste products and to confirm whether in vivo energy digestibility of hatchery wasteproducts could be estimated using in vitro data. Two in vitro assays were conducted for infertileeggs, unhatched eggs, culled chicks, and a mixture(20% dried infertile eggs, 20% driedunhatched eggs, and 60% dried culled chicks). In Exp.1, in vitro dry matter disappearance(IVDMD) of hatchery waste products was determined. In Exp.2, in vitro energy disappearance(IVED) was determined using undigested residues from Exp.1. The IVDMD of infertile eggs,unhatched eggs, culled chicks, and the mixture were 81.7, 88.7, 83.9, and 85.4%, respectively. The IVED of the test ingredients were 74.4, 85.1, 77.6, and 79.8%, respectively. Both IVDMDand IVED were greater in unhatched eggs compared with infertile eggs and culled chicks(p<0.05). In vivo energy digestibility was estimated well using prediction equations for hatcherywaste products developed in the present study: In vivo energy digestibility(%) = 2.52 × IVDMD(%) – 133.95 with r2 = 0.70 and in vivo energy digestibility(%) = 1.63 × IVED(%) – 50.03with r2 = 0.67. In conclusion, energy utilization of unhatched eggs was the greatest among testingredients and energy utilization of hatchery waste products can be estimated using data fromin vitro procedures.
Abstract
The objectives of this study were to determine in vitro dry matter and energy utilization ofhatchery waste products and to confirm whether in vivo energy digestibility of hatchery wasteproducts could be estimated using in vitro data. Two in vitro assays were conducted for infertileeggs, unhatched eggs, culled chicks, and a mixture(20% dried infertile eggs, 20% driedunhatched eggs, and 60% dried culled chicks). In Exp.1, in vitro dry matter disappearance(IVDMD) of hatchery waste products was determined. In Exp.2, in vitro energy disappearance(IVED) was determined using undigested residues from Exp.1. The IVDMD of infertile eggs,unhatched eggs, culled chicks, and the mixture were 81.7, 88.7, 83.9, and 85.4%, respectively. The IVED of the test ingredients were 74.4, 85.1, 77.6, and 79.8%, respectively. Both IVDMDand IVED were greater in unhatched eggs compared with infertile eggs and culled chicks(p<0.05). In vivo energy digestibility was estimated well using prediction equations for hatcherywaste products developed in the present study: In vivo energy digestibility(%) = 2.52 × IVDMD(%) – 133.95 with r2 = 0.70 and in vivo energy digestibility(%) = 1.63 × IVED(%) – 50.03with r2 = 0.67. In conclusion, energy utilization of unhatched eggs was the greatest among testingredients and energy utilization of hatchery waste products can be estimated using data fromin vitro procedures.
참고문헌 (15)
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