TY - JOUR
T1 - Failure of dietary amino acid supplementation at weaning to influence reproductive traits of sows.
AU - Rettmer, I.
AU - Goodband, R. D.
AU - Stevenson, J. S.
AU - Davis, D. L.
AU - Tokach, M. D.
AU - Rozeboom, D. W.
AU - Pettigrew, J. E.
AU - Johnston, L. J.
AU - Rust, J. W.
AU - Chester-Jones, H.
PY - 1993
Y1 - 1993
N2 - Primiparous and multiparous sows received a single dietary supplement of either L-tyrosine, L-phenylalanine, or L-glutamate in their feed on the day after weaning and effects on various reproductive traits were evaluated in three experiments. In Exp. 1 and 2, sows received either 0 (control; n = 22 and 64, respectively) or 100 mg of L-tyrosine/kg BW (n = 24 and 62, respectively) on the day after weaning. In Exp. 1, days from weaning to estrus (5.5 +/- .3 vs 5.3 +/- .3 d) and ovulation rate (15.6 +/- .9 vs 15.6 +/- 1) were similar in control and tyrosine-supplemented sows. In Exp. 2, interval from weaning to estrus was extended (P < .01) in tyrosine-supplemented sows (6.4 +/- .5 d) compared with controls (4.5 +/- .5 d), but this was due to long return intervals in 7 of 62 tyrosine-supplemented sows. Total number of pigs born (10.2 +/- .4 vs 10.0 +/- .4) was similar in control and tyrosine-supplemented sows. In Exp. 3, sows received either no supplemental amino acids (n = 31) or their diet was supplemented with 100 mg/kg BW of either L-tyrosine (n = 31), L-phenylalanine (n = 33), or L-glutamate (n = 32). Neither days from weaning to estrus nor subsequent farrowing traits were altered in sows that received supplemental amino acids on the day after weaning. In conclusion, a single dietary supplementation of either tyrosine, phenylalanine, or glutamate to sows on the day after weaning failed to improve interval from weaning to estrus, ovulation rate, or litter traits at subsequent farrowing.
AB - Primiparous and multiparous sows received a single dietary supplement of either L-tyrosine, L-phenylalanine, or L-glutamate in their feed on the day after weaning and effects on various reproductive traits were evaluated in three experiments. In Exp. 1 and 2, sows received either 0 (control; n = 22 and 64, respectively) or 100 mg of L-tyrosine/kg BW (n = 24 and 62, respectively) on the day after weaning. In Exp. 1, days from weaning to estrus (5.5 +/- .3 vs 5.3 +/- .3 d) and ovulation rate (15.6 +/- .9 vs 15.6 +/- 1) were similar in control and tyrosine-supplemented sows. In Exp. 2, interval from weaning to estrus was extended (P < .01) in tyrosine-supplemented sows (6.4 +/- .5 d) compared with controls (4.5 +/- .5 d), but this was due to long return intervals in 7 of 62 tyrosine-supplemented sows. Total number of pigs born (10.2 +/- .4 vs 10.0 +/- .4) was similar in control and tyrosine-supplemented sows. In Exp. 3, sows received either no supplemental amino acids (n = 31) or their diet was supplemented with 100 mg/kg BW of either L-tyrosine (n = 31), L-phenylalanine (n = 33), or L-glutamate (n = 32). Neither days from weaning to estrus nor subsequent farrowing traits were altered in sows that received supplemental amino acids on the day after weaning. In conclusion, a single dietary supplementation of either tyrosine, phenylalanine, or glutamate to sows on the day after weaning failed to improve interval from weaning to estrus, ovulation rate, or litter traits at subsequent farrowing.
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U2 - 10.2527/1993.7192511x
DO - 10.2527/1993.7192511x
M3 - Article
C2 - 8104923
AN - SCOPUS:17444443228
SN - 0021-8812
VL - 71
SP - 2511
EP - 2515
JO - Journal of animal science
JF - Journal of animal science
IS - 9
ER -