Yeonwoo

Digestibility of energy and concentrations of digestible and metabolizable energy in high-protein canola meal, conventional canola meal, and soybean meal in diets fed to lactating sows

Canola meal and soybean meal (SBM) are the most commonly used sources of amino acids in diets for swine. However, via genetic selection, varieties of canola with greater concentrations of crude protein and reduced concentrations of fiber have been identified. Following oil extraction, the resulting high-protein canola meal (CM-HP) contains 3 to 5 % more crude protein than conventional canola meal (CM-CV). It is, therefore, expected that CM-HP contains more digestible and metabolizable energy than CM-CV, but this hypothesis has not been experimentally verified (Liu et al., 2016). Therefore, it is the objective of this experiment to determine the apparent total tract digestibility (ATTD) of energy and concentrations of digestible energy (DE) in CM-HP, CM-CV, and SBM when fed to lactating sows.

Keywords: 
Digestibility of energy, high-protein canola meal, conventional canola meal, Soybean meal, Lactating sows
Authors: 
Yeonwoo, Ibagon, Stein
Publication Type: 
Research Reports

Digestible and metabolizable energy in soybean meal and soybean hulls when fed to growing pigs or sows

Values for digestible energy (DE) and metabolizable energy (ME) in feed ingredients are usually determined in growing pigs and subsequently applied to all groups of pigs. Results of recent research, however, indicate that the energy content of soybean meal (SBM) is greater than previously thought when fed to growing pigs. This increase in energy may be due to changes in the pigs themselves or differences in methodology, but there are no recent experiments assessing DE and ME in SBM when fed to sows. Therefore, it remains unclear if sows also have greater DE and ME in SBM compared with current book values. Likewise, there are no recent data for the DE and ME in soybean hulls although soybean hulls are often added to diets for gestating sows. Therefore, an experiment was conducted to test the hypothesis that gestating and lactating sows have greater DE and ME in SBM and soybean hulls than growing pigs and that DE and ME in SBM fed to both growing pigs and sows are greater than current book values. The second hypothesis was that there is no difference in apparent total tract digestibility (ATTD) of gross energy (GE) and DE between gestating and lactating sows.

Keywords: 
Digestibility, Energy, Sows, Soybean hulls, Soybean meal
Authors: 
Yeonwoo, Lee, Stein
Publication Type: 
Research Reports