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Effects of providing a water-soluble globulin in drinking water and diet complexity on growth performance of weanling pigs.
Journal of Animal Science 2002 December
Two experiments were conducted to evaluate the effects of providing a water-soluble globulin in the drinking water on growth performance of weanling pigs. In Exp. 1, 360 weanling pigs (5.0 +/- 1.2 kg; 17 +/- 3 d of age; PIC) were blocked by initial weight and allotted to one of six treatments in a 2 x 3 factorial arrangement. Treatments included three diet complexity regimens with or without water-soluble globulin (3 and 1.5% solutions; d 0 to 7 and d 0 to 14, respectively) provided in the drinking water. The 35-d study was divided into three phases (d 0 to 7, 7 to 14, and 14 to 35) with corresponding lysine levels of 1.6, 1.5, and 1.35%. Soybean meal replaced specialty protein and lactose sources to provide three different complexity regimens. From d 0 to 7, a water-soluble globulin x diet complexity interaction (P < 0.05) was observed for average daily gain (ADG) and gain:feed (G/F). Increasing diet complexity increased ADG and G/F for pigs provided water, whereas the medium diet complexity regimen optimized performance for pigs offered water-soluble globulin. From d 0 to 14, pigs fed the two more complex regimens had greater ADG and G/F (P < 0.01) than the pigs fed the least complex regimen. Pigs offered water-soluble globulin had decreased (P < 0.01) ADFI, but increased (P < 0.001) G/F from d 0 to 14. For overall performance (d 0 to 35), increasing diet complexity increased (P < 0.03) ADG and ADFI, whereas water-soluble globulin offered from d 0 to 14 had no effect. In Exp. 2, 360 weanling pigs (5.2 +/- 1.6 kg; 19 +/- 4 d of age) were used in a 21-d growth assay. The trial was arranged as a 2 x 3 factorial with pigs fed the low- or medium-complexity diets (Exp. 1) with water or a 3% solution of water-soluble globulin offered for 4 or 8 d after weaning. From d 0 to 4, pigs offered water-soluble globulin had increased (P < 0.001) ADG and G/F compared with pigs provided water, whereas from d 4 to 8, pigs provided water had increased (P < 0.05) ADG and G/F compared with pigs offered water-soluble globulin. Pigs fed the medium-complexity diet had increased ADG and G/F (d 4 to 8 and d 8 to 12) compared with pigs fed the low-complexity diet. From d 0 to 8 and d 0 to 21, pigs provided water-soluble globulin for 4 or 8 d after weaning had improved G/F compared with pigs provided water. Results demonstrate that providing water-soluble globulin through the water source of weanling pigs improves ADG and G/F immediately after weaning.
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