| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
ANIMAL NUTRITION |
* University of Missouri, Columbia 65211 and
and
Novus International Inc., St. Louis, MO 63304
3 Correspondence: Lab 111, Anim. Sci. Res. Center (phone: 573-882-7726; fax: 573-884-6093; e-mail: alleeg{at}missouri.edu).
Four experiments were conducted to determine the ideal ratio of true ileal digestible (TID) sulfur AA to Lys (SAA:LYS) in nursery pigs at two different BW ranges using both DL-Met and 2-hydroxy-4-(methylthio)-butanoic acid (HMTBA) as Met sources. In Exp. 1, 1,549 nursery pigs (Triumph 4 x PIC Camborough 22; initial BW 8.3 ± 0.08 kg) were allotted to one of nine dietary treatments. The basal diet (Diet 1) was a semicomplex corn-soybean meal-based diet (1.32% TID Lys) with no supplemental HMTBA or DL-Met (47.7% TID SAA:LYS). Diets 2 to 9 consisted of the basal diet supplemented with four equimolar levels of DL-Met or HMTBA (52.7, 57.7, 62.7, and 67.7% TID SAA:LYS). In Exp. 2, 330 nursery pigs (Triumph 4 x PIC Camborough 22; initial BW 11.4 ± 0.10 kg) were allotted to one of nine dietary treatments. The basal diet (Diet 1) was a corn-soybean meal-based diet (1.15% TID Lys) with no supplemental HMTBA or DL-Met (49% TID SAA:LYS). Diets 2 to 9 consisted of the basal diet supplemented with four equimolar levels of DL-Met or HMTBA (54, 59, 64, and 69% TID SAA:LYS). In Exp. 3, 1,544 nursery pigs (Triumph 4 x PIC Camborough 22; initial BW 12.4 ± 0.13 kg) were allotted to one of nine dietary treatments as in Exp. 2. In Exp. 4, 343 nursery pigs (Genetiporc; initial BW 12.8 ± 0.56 kg) were allotted to one of six dietary treatments. The basal diet (Diet 1) was a corn-soybean meal-based diet (1.05% TID Lys) with no supplemental DL-Met (49% TID SAA:LYS). Diets 2 to 5 consisted of the basal diet supplemented with four levels of DL-Met (54, 59, 64, and 69% TID SAA:LYS), and Diet 6 was the basal diet supplemented with one equimolar level of HMTBA to satisfy 59% TID SAA:LYS ratio. In all experiments, increasing the TID SAA:LYS ratio resulted in quadratic improvements in ADG (P 
0.09) and G:F (P 0.05). Three different methods were used to estimate the optimal TID SAA:LYS ratio for each experiment. The two-slope broken-line regression model, x-intercept value of the broken-line and quadratic curve, and 95% of upper asymptote across the four experiments indicated that the average optimal TID SAA:LYS ratios were 59.3, 60.1, and 57.7% for ADG and 60.6, 61.7, and 60.1% for G:F, respectively. Thus, the optimal TID SAA:LYS ratio for 8- to 26-kg pigs based on the average value of these three estimates was 59.0% for ADG and 60.8% for G:F.
Key Words: Methionine • Growth • 2-Hydroxy-4-(methylthio)Butanoic Acid • Pigs • Sulfur Amino Acid
This article has been cited by other articles:
|
|
 |
|
  S. Moehn, A. K. Shoveller, M. Rademacher, and R. O. Ball An estimate of the methionine requirement and its variability in growing pigs using the indicator amino acid oxidation technique J Anim Sci, February 1, 2008; 86(2): 364 - 369. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. Vazquez-Anon, R. Gonzalez-Esquerra, E. Saleh, T. Hampton, S. Ritcher, J. Firman, and C. D. Knight Evidence for 2-Hydroxy-4(Methylthio) Butanoic Acid and DL-Methionine Having Different Dose Responses in Growing Broilers Poult. Sci., August 1, 2006; 85(8): 1409 - 1420. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. F. Yi, A. M. Gaines, B. W. Ratliff, P. Srichana, G. L. Allee, K. R. Perryman, and C. D. Knight Estimation of the true ileal digestible lysine and sulfur amino acid requirement and comparison of the bioefficacy of 2-hydroxy-4-(methylthio)butanoic acid and DL-methionine in eleven- to twenty-six-kilogram nursery pigs J Anim Sci, July 1, 2006; 84(7): 1709 - 1721. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 D. H. Baker Comparative Species Utilization and Toxicity of Sulfur Amino Acids J. Nutr., June 1, 2006; 136(6): 1670S - 1675S. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
