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Performance of pigs fed diets containing canola meal produced from high protein or conventional varieties of canola seeds
Two experiments were conducted to determine effects of including high protein canola meal (CM-HP) or conventional canola meal (CM-CV) in diets fed to weanling pigs or growing-finishing pigs. In Exp. 1, 405 weanling pigs (10.07 ± 1.41 kg) were randomly allotted to 9 dietary treatments with 9 replicate pens per treatment and 4 to 6 pigs per pen. Nine diets were prepared with the control diet being based on corn and soybean meal (SBM) and 8 diets were formulated by adding 10, 20, 30, or 40% of either CM-HP or CM-CV to the control diet. The experiment lasted 21 d. Increased inclusion rate of CM-CV increased (quadratic, P < 0.05) ADG of weanling pigs. Increased inclusion rate of CM-HP or CM-CV decreased (linear, P < 0.05) ADFI, but increased (linear, P < 0.05) G:F of weanling pigs. Weanling pigs fed CM-CV had greater (P < 0.05) ADG and G:F than weanling pigs fed CM-HP. In Exp. 2, 280 pigs (27.4 ± 2.92 kg) were randomly allotted to 7 dietary treatments. A 3-phase feeding program was used with grower diets fed from 27 to 57 kg, finisher-1 diets from 57 to 85 kg, and finisher-2 diets from 85 to 112 kg. The 7 treatments consisted of a corn-SBM diet (control) and 6 diets containing a low, medium, or high level of either CM-HP or CM-CV. Low, medium, and high levels of canola meal were defined as the levels needed to replace 33, 66, or 100% of SBM in the diets. Increased inclusion rate of CM-HP decreased (linear, P < 0.05) pig BW at the end of phase 2 and at the end of the experiment, decreased (linear, P < 0.05) G:F in phase 2 and the overall period, and decreased (quadratic, P < 0.05) ADG in phase 3. Increased inclusion rate of CM-CV increased (linear, P < 0.05) ADFI, but reduced (linear, P < 0.05) G:F in phases 2 and 3 and for the overall period. Growing-finishing pigs fed CM-CV had greater (P < 0.05) ADG and ADFI than pigs fed CM-HP. In conclusion, inclusion of 20 to 30% CM-HP or CM-CV have no negative effects on growth performance of weanling pigs and CM-CV and CM-HP may replace up to 66% of the SBM in diets for growing-finishing pigs.
Keywords:
canola meal, high protein canola meal, pigs