ORIGINAL PAPER
Assessment of ileal digestibility of lupin amino
acids and their use in formulating diets for pigs
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1
The Kielanowski Institute of Animal Physiology and Nutrition,
Polish Academy of Sciences,
05-110 Jabłonna, Poland
2
Department of Animal Science and Technology,
College of Agriculture and Life Science, Seoul National University,
Suweon 441-744, Korea
Publication date: 1999-01-02
J. Anim. Feed Sci. 1999;8(1):13-26
KEYWORDS
ABSTRACT
The apparent and true ileal digestibility of protein and amino acids of five yellow lupin cultivars
grown in Poland was estimated on growing castrated male pigs. The nitrogen retention was determined on young boars fed a barley-yellow lupin diet supplemented with crystalline lysine, methionine and tryptophan.
The apparent ileal digestibility of the seed protein was from 81.9 to 84.9%. There were no
significant differences in protein or in amino acid apparent digestibility among the yellow lupin
cultivars. The true ileal digestibility of crude protein was from 87.5 to 90.5%. Nitrogen retention
was significantly lower (P<0.05) in pigs fed the diet supplemented with amino acids according to
pig requirements for total amino acids (methionine constituted 36% of the sulphur containing amino
acids) than in those fed the same diet but with higher methionine content (50% of sulphur containing
amino acids) or the diet supplemented according to the requirements for ileal digestible amino acids.
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