Life Sciences Commons^™

Effects Of Increasing Standardized Ileal Digestible Lysine During Gestation On Growth And Reproductive Performance Of Gilts And Sows Under Commercial Conditions, L. L. Thomas, L. K. Herd, R. D. Goodband, S. S. Dritz, M. D. Tokach, J. C. Woodworth, J. M. Derouchey, M A. Gonçalves, D. B. Jones

Kansas Agricultural Experiment Station Research Reports

A study was conducted on a commercial sow farm to evaluate the effects of increasing dietary standardized ileal digestible (SID) lysine (Lys) intake in gestation on sow performance and piglet birth weight. A total of 936 females (498 gilts, 438 sows; Camborough, PIC, Hendersonville, TN) were group-housed (approximately 275 females per pen) and individually fed with electronic sow feeders (ESF). Scales were located in the alleyway after the feeding stations returning into the pen. Females were moved from the breeding stall to pens on d 4 of gestation and were allotted to 1 of 4 dietary treatments on d 5. …

Leucine Supplementation Did Not Improve Protein Deposition Or Lysine Utilization In Growing Steers, K. A. Pearl, H. F. Speer, M. D. Miesner, E. C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

Objective:This study was conducted to determine if leucine supplementation could improve protein deposition and lysine utilization in growing steers.

Study Description:Ruminally cannulated Holstein steers (380 lb) were provided treatments of postruminal infusions of 0 or 0.212 oz/day of lysine, and 0, 0.529, or 1.058 oz/day of leucine, with all 6 combinations tested. Ruminal infusions of volatile fatty acids and abomasal infusions of glucose provided energy, and all essential amino acids, except lysine, were infused abomasally to make lysine the sole limiting amino acid. Urine and fecal collections were used to measure nitrogen retention (protein deposition).

The …