TY  - JA
AU  - Zimmerman,D.R.
TI  - Tryptophan requirements of 5- to 15-Kg pigs with semipractical pig starters
SN  - 1525-3163
PY  - 1975///
CY  - Illinois (United States of America)
PB  - American Society of Animal Science
KW  - Nutrition
KW  - AGROVOC
KW  - Swine
KW  - Crude protein
KW  - Tryptophan
KW  - Whey protein
KW  - Bio-assays
KW  - In vivo experimentation
N1  - Peer review
N2  - Two 28-day trials, each using 35 baby pigs initially weighing about 5 kg and 3 weeks of age were used to determine responses in pig weight gain, feed:gain, plasma-free tryptophan and plasma urea nitrogen to graded levels of dietary tryptophan. In experiment 1 the tryptophan requirement was estimated to be about .15% of the diet in an 18.8% crude protein diet containing .103% tryptophan from feedstuffs and additions from synthetic L-tryptophan. In experiment 2 the estimated requirement also was .15% in a basal diet similar to that of experiment 1, with tryptophan additions from a delactosed whey product. Chemically determined tryptophan in delactosed whey was completely available by bioassay
DO  - https://doi.org/10.2527/jas1975.405875x
T2  - Journal of Animal Science
ER  -