Comparative evaluation of standardized ileal amino acid digestibility in protein supplements for piglets.
Standardized ileal digestibility (SID) of AA was determined in 6 protein ingredients for piglets. A basal diet based on corn (Zea mays) starch and casein was supplemented with fluid-bed-dried porcine intestinal mucosa hydrolysate, spray-dried porcine intestinal mucosa hydrolysate, soy (Glycine max) protein concentrate, 2 batches of soy protein, or full-fat soybeans. The SID of AA did not differ between the 4 soybean products (P > 0.05). Compared to most SID values in the 4 soybean products, SID of AA were lower in the 2 porcine intestinal mucosa hydrolysates (P ≤ 0.05). In conclusion, although the initial trypsin inhibitor contents in the raw soybeans have not been determined, high SID values in the 4 soybean products indicate that the different processing procedures used to manufacture these products were efficient to inactivate trypsin inhibitors. For most AA in the 2 porcine intestinal mucosa hydrolysates, drying procedure did not affect SID of AA, but SID values were generally lower compared to the 4 soybean products.
Institute of Animal Nutrition, University of Hohenheim, 70593 Stuttgart, Germany. Meike.Eklund@uni-hohenheim.de
M
M
Eklund
N
N
Sauer
S
S
Hörner
M
M
Rademacher
R
R
Mosenthin
D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D004032:Diet / Q000662:veterinary; D004044:Dietary Proteins / Q000032:analysis / Q000378:metabolism*; D019587:Dietary Supplements; D004063:Digestion / Q000502:physiology*; D007082:Ileum / Q000502:physiology*; D007413:Intestinal Mucosa / Q000737:chemistry; D013552:Swine / Q000502:physiology*
D004044:Dietary Proteins