HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Gottlob, R. O. Articles by Knabe, D. A. Search for Related Content PubMed PubMed Citation Articles by Gottlob, R. O. Articles by Knabe, D. A.

Amino acid and energy digestibility of protein sources for growing pigs^1,2

R. O. Gottlob^*, J. M. DeRouchey^*,3, M. D. Tokach^*, R. D. Goodband^*, S. S. Dritz^*, J. L. Nelssen^*, C. W. Hastad^* and D. A. Knabe

^* Department of Animal Sciences and Industry, Kansas State University, Manhattan 66506–0201; and and Department of Animal Science, Texas A & M University, College Station 77843–2471

³ Corresponding author: jderouch{at}ksu.edu

Two experiments were conducted to determine the apparent ileal digestibility (AID) and standardized ileal digestibility (SID) of AA and DE, and to estimate ME and NE of rice protein concentrate, salmon protein hydrolysate, whey protein concentrate, and spray-dried plasma protein. In Exp. 1, 6 barrows (initially 29.5 ± 2.5 kg of BW) were fitted with ileal T-cannulas and fed each of 5 cornstarch-based diets in a balanced crossover design over 35 d. During a given week, there were either 1 or 2 replications of each treatment, resulting in 6 total replications over 5 wk. The 4 test diets (fed from d 0 to 28) were formulated to contain 12.5% CP by using analyzed nutrient compositions of rice protein concentrate, salmon protein hydrolysate, whey protein concentrate, or spray-dried plasma protein. The fifth (N-free) diet was fed from d 28 to 35 to estimate basal endogenous losses of CP and AA, which were used to calculate SID. Ileal digesta were collected and analyzed, and AID and SID values were calculated. Apparent ileal digestible Lys, Met, and Thr values were 80.0 ± 3.3, 65.6 ± 3.1, and 68.4 ± 4.5% for rice protein concentrate; 85.6 ± 4.8, 85.5 ± 4.3, and 69.8 ± 8.5% for salmon protein hydrolysate; 93.3 ± 1.4, 89.9 ± 5.8, and 83.6 ± 5.3% for whey protein concentrate; and 92.8 ± 0.9, 85.7 ± 2.1, 86.5 ± 2.3% for spray-dried plasma protein, respectively. In Exp. 2, 6 barrows (initially 37.6 ± 1.7 kg of BW) were fed each of 5 corn-based diets in a balanced crossover design over 35 d. During a given week, there were either 1 or 2 replications of each treatment, resulting in 6 total replications over 5 wk. The 4 diets containing the test ingredients were formulated to contain approximately 20% CP by using their analyzed nutrient compositions. The fifth (corn control) diet containing 8.2% CP was also used to calculate energy values by difference. Feces were collected to determine DE. The ME and NE contents were estimated using published regression equations. The DE, ME, and NE (as-fed) values were 4,724 ± 461, 4,226 ± 437, and 3,235 ± 380 kcal/kg for rice protein concentrate; 4,173 ± 1,052, 3,523 ± 1,002, and 2,623 ± 872 kcal/kg for salmon protein hydrolysate; 4,949 ± 1,002, 4,352 ± 955, and 3,344 ± 831 kcal/kg for whey protein concentrate; and 4,546 ± 673, 3,979 ± 652, and 3,020 ± 567 kcal/kg for spray-dried plasma protein, respectively. The excellent AA digestibility and relatively high DE, ME, and NE values indicate that these protein sources warrant further investigation as ingredients for growing pig diets.

Key Words: amino acid • digestibility • energy • protein source • pig

This article has been cited by other articles:

				T. M. Hill, H. G. Bateman II, J. M. Aldrich, and R. L. Schlotterbeck Effects of Using Wheat Gluten and Rice Protein Concentrate in Dairy Calf Milk Replacers Professional Animal Scientist, October 1, 2008; 24(5): 465 - 472. [Abstract] [PDF]