Standardized Ileal Digestible Lysine Requirement of 6- to 10-kg Weanling Pigs
Chan Sol Park and Beob Gyun Kim
DOI : 10.3844/ajavsp.2015.150.155
American Journal of Animal and Veterinary Sciences
Volume 10, Issue 3
The objective of the experiment was to determine the Standardized Ileal Digestible (SID) lysine requirement for weanling pigs from 6 to 10 kg of Body Weight (BW). A total of 216 weanling pigs with an initial BW of 6.23Â±0.93 kg were assigned to six diets in a randomized complete block design with five blocks based on BW. Six corn-dried whey-soybean meal-based diets were formulated to contain 6 concentrations of SID lysine from 1.17 to 1.62% with an increment of 0.09% at the expense of corn. Pigs were fed experimental diets during 14 days of trial and BW of pigs and feed intake were recorded on day 7 and 14. During the first 7 days, average daily gain, Average Daily Feed Intake (ADFI) and Gain:Feed (G:F) of pigs were not affected by the dietary SID lysine concentration. However, the ADFI of pigs linearly decreased (p=0.002) as the SID lysine concentration increased during the following 7 days. During the overall period, the addition of dietary SID lysine linearly decreased (p=0.007) ADFI whereas linearly increased (p=0.011) G:F. The SID lysine requirement was determined by four different statistical analyses including linear broken-line model, quadratic broken-line model, 95% of the upper asymptotic value of quadratic model and the former intercept between plateau of the linear broken-line model and quadratic model. Mean value for the SID lysine requirement was 1.43% (4.07 g/Mcal metabolizable energy), ranged from 1.39 to 1.49% (from 3.95 to 4.24 g/Mcal metabolizable energy) based on G:F of pigs from 6 to 10 kg of BW.
© 2015 Chan Sol Park and Beob Gyun Kim. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.