Swine
Authors: Julia A. Calderón Díaz (Iowa State University) , Jeffrey L. Vallet (United States Department of Agriculture) , Clay Lents (United States Department of Agriculture) , Danny Nonneman (United States Department of Agriculture) , Jeremy Miles (United States Department of Agriculture) , Elaine Wright (United States Department of Agriculture) , Lea Rempel (United States Department of Agriculture) , Robert Cushman (United States Department of Agriculture) , Bradley Freking (United States Department of Agriculture) , Gary Rohrer (United States Department of Agriculture) , Christina Phillips (Murphy Brown, LLC) , Ashley DeDecker (Murphy Brown, LLC) , George Foxcroft (University of Albert) , Kenneth J. Stalder (Iowa State University)
The effect of feeding different lysine and metabolizable energy (ME) levels to 1221 crossbred Large White × Landrace developing gilts housed in groups from 100 d of age until slaughter (approximately 260 d of age) on age at puberty and reproductive tract measurements were evaluated. Gilts were randomly allotted to six corn-soybean diets formulated to provide two standardized ileal digestible lysine levels [100% (high, HL) and 85% (low, LL)] and threemetabolizable energy levels [ME, 90% (low, LME), 100% (medium, MME), 110% (high, HME). Average age at puberty was 193 d of age. There were no effects of the dietary treatments on age at puberty or any of the reproductive tract measurements. Despite significant differences in the lysine:energy ratio in the diets, the expected differences in reproductive traits were not observed. Other factors such as body weight (BW) and days of estrous cycle had a greater effect on the traits recorded than feed provided.
Keywords: Animal Science, ASL R3022
How to Cite: Calderón Díaz, J. A. , Vallet, J. L. , Lents, C. , Nonneman, D. , Miles, J. , Wright, E. , Rempel, L. , Cushman, R. , Freking, B. , Rohrer, G. , Phillips, C. , DeDecker, A. , Foxcroft, G. & Stalder, K. J. (2015) “Optimal Dietary Energy and Protein for Gilt Development: Age at Puberty, Ovulation Rate, and Reproductive Tract Traits”, Iowa State University Animal Industry Report. 12(1). doi: https://doi.org/10.31274/ans_air-180814-1338