Nutritive value of carinata meal and cold-pressed canola expellers for pigs

Abstract

Carinata meal, a co-product from carinata seed oil extraction plants, is available for livestock feeding. Also, cold-pressed canola expellers (Cold-pressed CME), a co-product from canola seed oil extraction plants, is available for livestock feeding. The nutritive value of carinata meal for pigs has not been reported. Also, there is limited information on the nutritive value of cold-pressed CME for pigs. The objective of this study was to determine standardized ileal digestibility (SID) of amino acids (AA) and net energy value of carinata meal and Cold-pressed CME for growing pigs. Eight ileal-cannulated barrows (initial body weight = 32.7 ± 1.46 kg) were fed 3 diets a replicated 3 × 3 Latin square design in combination with a 3 × 2 Youden square design, to give 8 replicates/diet. The diets were cornstarch-based, containing Cold-pressed CME or carinata meal as sole protein source, and N-free. Digestibility of AA in feedstuffs was determined by the direct method. Energy digestibility in Cold-pressed CME and carinata meal was determined by difference from the N-free diet. On dry matter basis (DM), Cold-pressed CME and carinata meal contained 396 and 502 g/kg crude protein, 207 and 268 g/kg neutral detergent fiber, 160 and 8.8 g/kg ether extract, 23.2 and 18.2 g/kg lysine, 7.4 and 9.6 g/kg methionine, 16.3 and 18.9 g/kg threonine, and 5.0 and 6.4 g/kg tryptophan, respectively. The Cold-pressed CME compared with carinata meal, had greater (P < 0.05) SID of lysine (0.744 vs. 0.601). Conversely, Cold-pressed CME compared with carinata meal, had lower (P < 0.05) SID of methionine (0.821 vs. 0.878) and tryptophan (0.818 vs. 0.898), and tended to be lower (P = 0.078) in SID of threonine. The Cold-pressed CME and carinata meal did not differ in coefficient of apparent ileal digestibility of gross energy (0.433 vs. 0.376). The Cold-pressed CME had lower (P < 0.05) coefficient of apparent total tract digestibility of GE than carinata meal (0.573 vs. 0.671). The Cold-pressed CME and carinata meal did not differ in digestible energy (12.99 vs. 12.83 MJ/kg). However, Cold-pressed CME had greater (P < 0.05) net energy value than carinata meal (8.20 vs. 6.74 MJ/kg DM). In conclusion, carinata meal has lower energy value than Cold-pressed CME, however, the former had greater SID of most AA than the latter. Both Cold-pressed CME and carinata meal can serve as alternative oilseed co-product feedstuffs for pigs.