Zhou, X., Young, M. G., Zamora, V., Zijlstra, R. T. and Beltranena, E. 2014. Feeding increasing dietary inclusions of extruded Brassica juncea canola expeller-pressed cake on growth performance, carcass characteristics, and jowl fatty acids of growing-finishing pigs. Can. J. Anim. Sci. 94: 331–342. The energy value of canola meal is considered low because of its relatively higher fibre and depleted oil content. Brassica juncea is a novel canola species with thinner seed coat and reduced fibre, but twice the glucosinolate content of B. napus. Remaining oil in canola cake provides greater dietary energy compared with solvent-extracted meal. Extrusion prior to expeller pressing may increase fat and protein digestibility and decrease the antinutritive effects of glucosinolates. A total of 880 pigs (38 kg), housed in 40 pens by sex, were fed 0, 5, 10, 15, or 20% extruded B. juncea expeller-pressed cake (EPC) to slaughter weight (120 kg) to evaluate the effects on growth performance, dressing, carcass traits, and jowl fatty acids. Diets provided 9.6 MJ net energy (NE) and 1.0, 0.9, 0.8, 0.7, and 0.7 g standardized ileal digestible Lys:MJ NE over five growth phases (days 0–14, 15–35, 36–56, 57–74, day 75 to slaughter weight). Each 5% EPC inclusion linearly decreased (P<0.05) feed disappearance (ADFI) by 46 g and weight gain (ADG) by 8 g, but did not affect gain:feed. Each 5% EPC inclusion linearly decreased (P<0.01) carcass weight by 440 g, loin depth by 0.6 mm, and increased days on test by 0.43, but did not affect dressing, backfat thickness, lean yield, or carcass index. Each 5% EPC inclusion linearly increased (P<0.001) mono- and polyunsaturated fatty acid content and iodine value by 0.8, 1.0 and 1.4 g 100 g−1 of jowl fat, respectively. In conclusion, increasing dietary EPC inclusions decreased ADFI, ADG, carcass weight, and loin depth, and increased jowl fat unsaturation. We attributed much of the decrease in feed intake to greater 3-butenyl (9.7 µmol g−1) content in extruded B. juncea canola expeller-pressed cake, a glucosinolate more bitter than others in conventional canola.

and Beltranena, E. 2015. Empiric narrowing of the net energy value of reduced-oil corn distillers' dried grain with solubles for growing-finishing pigs. Can. J. Anim. Sci. 95: 225Á241. This study attempted to empirically narrow down the net energy (NE) value of reduced-oil corn distillers' dried grains and solubles (RO-cDDGS) by evaluating the response in pig growth performance, live backfat and loin depth, carcass traits, and primal pork cuts tissue composition to feeding diets formulated increasing the assumed NE value of RO-cDDGS, expecting a brisk change in slope of the response at the point at which the NE value of RO-cDDGS would be identified. In total, 1056 cross-bred pigs (31.7 kg) housed in 48 pens by gender were fed dietary regimens including 30% RO-cDDGS (6.7% ether extract) with assumed NE values of 1.7, 1.85, 2.0, 2.15, 2.3, or 2.45 Mcal kg(1 over five growth periods (Grower 1: days 0Á21, Grower 2: days 22Á42, Grower 3: days 43Á63, Finisher 1: days 64Á76, Finisher 2: day 77 to market weight). Pig body weights were measured and feed disappearance (ADFI) was calculated by pen on days 0, 21, 42, 63, 76 and weekly thereafter until target slaughter weight (120 kg). For the entire trial (days 0Á76), increasing the assumed NE value of RO-cDDGS linearly increased (PB0.01) ADFI and total lysine intake, did not affect NE intake and daily weight gain (ADG), quadratically decreased (P B0.05) feed efficiency, linearly decreased (P B0.05) live backfat depth and backfat:loin depth ratio, and did not affect carcass characteristics or pork primal cut tissue composition. Segmented regression only identified a change in slope for carcass ADG and lean ADG at 1.85 Mcal kg (1 . These results indicate that the experimental approach taken was not reliable in narrowing down the NE value of RO-cDDGS because the decrease in dietary NE was too small (0.03 Mcal kg(1 d), which limited the change in dietary Lys:NE ratio with increasing assumed NE value of RO-cDDGS. The approach resulted in progressive, but small changes in slope rather than a clearly identifiable point where one could conclude that the incremental dietary energy contribution from RO-cDDGS changed the response in a given variable.Key words: Carcass traits, distillers' dried grains with solubles, growth performance, net energy, pig Smit, M. N., Zamora, V., Young, M. G., Campbell, N., Uttaro, B. et Beltranena, E. 2015. Resserrement empirique de la valeur d'e´nergie nette de la dreˆche de distillerie de maı¨s avec solubles (a`teneur re´duite en huile) pour les porcs en croissancefinition. Can. J. Anim. Sci. 95: 225Á241. Cette e´tude avait pour but le resserrement de la valeur d'e´nergie nette (NE Á « net energy ») de la dreˆche de distillerie de maı¨s avec solubles (a`teneur re´duite en huile) (RO-cDDGS Á « reduced-oil corn distillers' dried grains and solubles ») en e´valuant la re´ponse des porcs a`l'alimentation par die`tes formule´es pour accroıˆtre la valeur NE pre´sume´e de RO-cDDGS selon la performance de croissance, l'e´paisseur du gras dorsal (vif) et profon...