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Two experiments were conducted to evaluate the effects of Liquid Energy and choice white grease (CWG) on growth performance of nursery pigs. In Exp. 1, a total of 150 nursery pigs ( initially 12.25 kg) were used in a 21-d experiment. Pens of pigs were balanced by initial BW and randomly allotted to 1 of 5 dietary treatments with 6 replications per treatment. The 5 dietary treatments included a control corn-soybean meal-based diet, the control diet with 2 or 4% CWG, or the control diet with 2 or 4% LE.
Overall (d 0 to 21), pigs fed diets containing liquid energy had improved ADG (0.67 vs. 0.63 ± 0.03 kg; P < 0.02) and ADFI (1.01 vs. 0.96 ± 0.04 kg; P < 0.04) with no change in F/G compared with control pigs. Pigs fed CWG had greater ADG (0.66 vs. 0.63 ± 0.03 kg; P < 0.04) and improved F/G (1.46 vs. 1.54 ± 0.02; P < 0.01) compared with pigs fed the control diet. In Exp. 2, a total of 228 nursery pigs (TR4 x 1050, initially 6.4 kg and 3 d post-weaning) were used in 30-d trial. Pigs were randomly allotted to 1 of 6 dietary treatments with 7 pens per treatment. Treatment diets contained 4.5% fishmeal and 10% dried whey. The 6 dietary treatments were in a 2 x 3 factorial arrangement with main effects of either 0 or 4% CWG and 0, 2, or 4% liquid energy. Diets were formulated to equal standardized ileal digestible (SID) lysine:ME for each phase. From d 0 to 14, a CWG x liquid energy interaction (quadratic, P < 0.01) was observed for ADG, which was the result of 2% liquid energy decreasing ADG when added to diets without CWG but increasing ADG when added to diet containing CWG. Pigs fed CWG had decreased ADG (P < 0.05) and ADFI (P < 0.02) compared with the pigs fed diets without CWG. Growth in pigs fed liquid energy did not differ. From d 14 to 30, a CWG x liquid energy interaction (quadratic, P < 0.02) occurred for ADFI. Pigs fed 2% liquid energy without CWG had lower ADFI (0.77 kg) compared with other no-CWG treatments (0.82 – 0.85 kg); however, pigs fed the CWG diet with 2% liquid energy had greater ADFI than other CWG treatments. The addition of CWG decreased (P < 0.01) ADFI but improved (P < 0.01) F/G compared with pigs fed no CWG. Growth for pigs fed liquid energy did not differ. Overall (d 0 to 30), CWG x liquid energy interactions were observed for ADG (quadratic, P < 0.07) and ADFI (quadratic, P < 0.03). Feeding liquid energy in diets without CWG resulted in lower ADG and feed intake; however, addition of liquid energy to diets containing CWG improved ADG and feed consumption compared with the 4% CWG diet without liquid energy. Pigs fed CWG had reduced ADFI (0.55 to 0.59 kg; P < 0.01) and improved F/G (1.44 to 1.49; P < 0.01) compared with pigs fed diets without CWG (ADG ranged: 0.62 to 0.63 kg; F/G ranged: 1.56 to 1.58).
Feeding liquid energy had no significant influence on any growth criteria. Feeding CWG improved F/G as expected in both experiments. Although ADG was improved in one experiment for pigs fed liquid energy, no differences were found in feed efficiency.
W Ying, JM DeRouchey, MD Tokach, SS Dritz, RD Goodband, JL Nelssen. 2011. Effects of XFE liquid energy and choice white grease on nursery pig performance .Swine Day Kansas State, 129-137.
