Relationship of blood plasma free amino acids and ingested protein in swine

The threonine requirement for reproduction in swine

“…The pig's inability to utilize much of the threonine ingested adds understanding to threonine's position as the second most limiting amino acid in most cereal grains (Bressani et al,, 1972) and, perhaps, in soybean oil meal (Berry et al,, 1962;Clark, 1963;Long, 1956). Conse quently, after combining feed ingredients, threonine is often the second or third most limiting amino acid.…”