Processing of soybean meal and 00-rapeseed meal reduces protein digestibility and pig growth performance but does not affect nitrogen solubilization along the small intestine1

Protein quality of pig diets : processing effects on amino acid digestibility and post-absorptive utilization

“…After this week, pigs were allocated either to the initial slaughter group (0-pig) or to an experimental diet and subsequently to a pen. The housing conditions of the pigs are described elsewhere (Hulshof et al, 2016b). …”

“…From each BW block consisting of seven pigs, one pig was randomly chosen and allocated to the initial slaughter group. The other 54 pigs were randomly allocated to one of six experimental diets within a block and allocated to a pen in each of four rooms as described previously (Hulshof et al, 2016b). The five 0-pigs were divided over two rooms and housed in groups of two and three pigs, respectively.…”

“…L-Glutamine was added to these diets to account for the loss in SID of dispensable AA. The manufacturing and the ingredient and chemical compositions of the experimental diets have been described previously (Hulshof et al, 2016b). The calculated SID AA concentration and SID AA to SID Lys ratio of the six experimental diets are provided in Table 4.1.…”

“…Blood and the empty visceral organs, referred to as organ fraction, were collected together in a bag as described previously (Hulshof et al, 2016b) and frozen at -20°C. The carcass, including head, teeth, feet, hair, and skin, was collected in plastic bags, and frozen at -20°C.…”

“…Reactions occurring during processing, could lead to an imbalance among available AA and between AA and net energy. This was shown to affect organ weight, carcass composition, and the gain to feed ratio (Hulshof et al, 2016b). Conde-Aguilera et al (2010) found that pigs were able to alter the AA composition of retained protein when fed a diet deficient in sulfur AA.…”