We evaluated the apparent (AID) and standardized ileal digestibility (SID) of amino acids (AA) in spray-dried egg (SPE) and albumen powder (AP) compared with spray-dried porcine plasma (SDPP), dried porcine solubles (DPS) and fish meal (FM). Additionally, the effects of these egg byproducts as a replacement for conventional animal proteins on the performance and nutrient digestibility of piglets were studied. In Exp. 1, six barrows fitted with ileal T-cannulas were allotted to a 6×6 Latin Square design and fed six diets. The AID and SID of AA were generally higher in AP and FM (P<0.01) than in the other protein sources. In Exp. 2, 150 piglets weaned at 21 days, were fed diets containing the five protein sources for 3 weeks. Weight gain of piglets fed SDPP was the highest among the treatments. Dry matter and protein digestibility for pigs offered SDPP were higher (P<0.01) than those offered FM and DPS. AP decreased (P<0.05) Escherichiacoli counts in the cecum. DPS decreased (P<0.05) serum diamine oxidase compared with SPE. In conclusion, AP and SPE are competitive with traditional animal protein sources and can be successfully fed to piglets without compromising performance.
- Amino acid