dc.contributor.author |
Schneider, J.D. |
|
dc.contributor.author |
Tokach, Michael D. |
|
dc.contributor.author |
Goodband, Robert D. |
|
dc.contributor.author |
Nelssen, Jim L. |
|
dc.contributor.author |
DeRouchey, Joel M. |
|
dc.contributor.author |
Dritz, Steven S. |
|
dc.date.accessioned |
2009-10-20T18:40:17Z |
|
dc.date.available |
2009-10-20T18:40:17Z |
|
dc.date.issued |
2009-10-20T18:40:17Z |
|
dc.identifier.uri |
http://hdl.handle.net/2097/1897 |
|
dc.description.abstract |
Two studies were conducted to evaluate
the effects of increasing dietary lysine and energy density on nursery-pig performance. Exp. 1 was organized as a combination of two simultaneous experiments, with one set of diets consisting of five treatments with increasing TID lysine (0.99, 1.07, 1.14, 1.22, and 1.30%) concentrations, and the second set of diets consisting of five treatments with increasing energy density (1342, 1406, 1471, 1535, and 1600 kcal/lb). The highest l of both lysine and energy density (1.30% and 1600 kcal/lb, respectively) were combined as one diet and
used in both the lysine and energy-density titrations to give a total of 10 treatments. Pigs were randomly allotted to 8 replications with 5 pigs per pen on the basis of BW. Overall (d 0 to 21) in Exp. 1 increasing true-ileal-digestible (TID) lysine increased ADG linearly and improved
feed efficiency. Although increasing energy density had no effect on ADG, ADFI decreased, which resulted in a quadratic improvement in F/G. Regression analysis of the response surface was used to predict the optimal lysine-to-calorie ratio of 3.65 to 3.71 g lysine/Mcal ME for the Gentiporc pigs used in this experiment. In Exp 2, pigs were fed diets with two different energy densities (1.34 or 1.49 Mcal ME/lb) with TID lysine-to-calorie ratios ranging from 3.1 to 4.1 g/Mcal ME. There was an energy density by TID lysine-tocalorie ratio interaction observed for ADG. Pigs fed the low-energy diets had the greatest ADG at a lysine-to-calorie ratio of 3.60. For pigs fed the high energy diets, ADG improved as the lysine-to-calorie ratio improved to 3.36 g of TID lysine/Mcal ME. There was a quadratic improvement in feed efficiency as the
lysine-to-calorie ratios were increased for the pigs fed the low-energy diet, with the best F/G value observed at 3.87; but the pigs fed the high-energy diets had a linear improvement in F/G as the lysine-to-calorie ratios were increased. Although there was a linear improvement in F/G for the high-energy diet, little improvement in feed efficiency was observed when the lysine-to-calorie ratio was increased from 3.36 to 4.07. On the basis of these results, we suggest that the optimal lysine-to-calorie ratio is 3.30 to 3.87 g of TID lysine/Mcal ME for 20- to 50-lb Genetiporc pigs in these facilities. |
en_US |
dc.publisher |
Kansas State University. Agricultural Experiment Station and Cooperative Extension Service |
en_US |
dc.relation.isPartOf |
Swine day, 2004 |
en_US |
dc.relation.isPartOf |
Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 940 |
en_US |
dc.relation.isPartOf |
Kansas Agricultural Experiment Station contribution ; no. 05-113-S |
en_US |
dc.subject |
Lysine |
en_US |
dc.subject |
Energy |
en_US |
dc.subject |
Nursery pigs |
en_US |
dc.subject |
Pigs |
en_US |
dc.subject |
Swine |
en_US |
dc.title |
Determining the optimal lysine to calorie ratio for growth performance of 20- to 50-lb genetiporc nursery pigs |
en_US |
dc.type |
Conference paper |
en_US |
dc.date.published |
2004 |
en_US |
dc.citation.epage |
125 |
en_US |
dc.citation.spage |
118 |
en_US |
dc.description.conference |
Swine Day, 2004, Kansas State University, Manhattan, KS, 2004 |
en_US |
dc.contributor.authoreid |
mtokach |
en_US |
dc.contributor.authoreid |
dritz |
en_US |
dc.contributor.authoreid |
goodband |
en_US |
dc.contributor.authoreid |
jnelssen |
en_US |
dc.contributor.authoreid |
jderouch |
en_US |