| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
Illinois Agricultural Experiment Station, Urbana
Abstract
Nitrogen balance experiments were conducted to determine some amino acid needs of pigs weighing about 10 kg. and fed a semi-synthetic diet. Maximum nitrogen retention was the major criterion of response to graded amino acid levels. The pigs were equally fed for a 7-day pre-test period, and urine and feces were collected for the following 5 days.
The needs for various amino acids, expressed as percent of the diet, were as follows: isoleucine, 0.67; threonine, 0.60; tryptophan, 0.15; valine, 0.55; and total sulfur-bearing amino acids, 0.74. Further, cystine can replace at least 70% of the need for total sulfur-bearing amino acids. The young pig utilized dietary nitrogen most efficiently when the essential and non-essential amino acids each furnished about 50% of the total dietary nitrogen.
A crystalline amino acid diet containing 10.7% protein equivalent and glutamic acid as the sole source of non-essential nitrogen supported nitrogen retention equal to a diet with the same essential amino acid distribution but with 1% casein. Substitution of 10% casein into the amino acid diet and a diet containing 17% casein plus 0.24% methionine supported a greater nitrogen retention by pigs than the amino acid diets. During a 9-day feeding trial young pigs fed the amino acid diet gained 0.34 kg. per day and those fed 17% casein gained 0.42 kg. daily.
1 Present address: Commercial Solvents Corporation. Terre Haute, Indiana.
This article has been cited by other articles:
|
|
 |
|
  R. Barea, L. Brossard, N. Le Floc'h, Y. Primot, D. Melchior, and J. van Milgen The standardized ileal digestible valine-to-lysine requirement ratio is at least seventy percent in postweaned piglets J Anim Sci, March 1, 2009; 87(3): 935 - 947. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. J. Kerr, M. T. Kidd, J. A. Cuaron, K. L. Bryant, T. M. Parr, C. V. Maxwell, and J. M. Campbell Isoleucine requirements and ratios in starting (7 to 11 kg) pigs J Anim Sci, August 1, 2004; 82(8): 2333 - 2342. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. K. Shoveller, J. A. Brunton, J. D. House, P. B. Pencharz, and R. O. Ball Dietary Cysteine Reduces the Methionine Requirement by an Equal Proportion in Both Parenterally and Enterally Fed Piglets J. Nutr., December 1, 2003; 133(12): 4215 - 4224. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. M. Parr, B. J. Kerr, and D. H. Baker Isoleucine requirement of growing (25 to 45 kg) pigs J Anim Sci, March 1, 2003; 81(3): 745 - 752. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
