M. M. Lordelo, A. M. Gaspar, L. Le Bellego, J. P. B. Freire

Author Notes

Journal of AnimalScience, Volume 86, Issue 11,November 2008, Pages 2936–2941, https://doi.org/10.2527/jas.2007-0222

摘 要

60头单栏饲喂的仔猪分到5个不同的日粮组，每组12头。日粮1是正对照，蛋白20%。日粮2是低蛋白负对照，蛋白17%。日粮3、4、5是在日粮2的基础上，分别补充了异亮氨酸、缬氨酸、或异亮氨酸+缬氨酸。所有日粮都添加了赖、蛋、苏、色这四种氨基酸，满足1998版NRC需要。正对照和添加了缬氨酸的实验组，或同时加了异亮氨酸和缬氨酸的实验组，日增重、采食量相似。在第二周和第四周，20%蛋白的正对照比其他各组粪便偏软。这些结果显示，在含有足量赖、蛋、苏、色的玉米-小麦-豆粕型低蛋白饲料中，单独补充缬氨酸，或同时补充缬氨酸和异亮氨酸，对于获得最佳生产性能是必要的（可以达到和高蛋白正对照相似的生长效果）。

原文摘要

The effects of Ile and Val supplementation of a low-CP, corn-wheat-soybean meal-based piglet diet on growth performance, incidence of diarrhea, and N balance were studied using 60 Landrace × Duroc male piglets in a 4-wk experiment. The 60 individually caged piglets were divided into 5 dietary treatments, each consisting of 12 piglets. Diet 1 was a positive control diet (20% CP); diet 2 was a low-CP negative control diet (17% CP); diets 3, 4, and 5 were low-CP diets to which Ile, Val, or the combination of Ile and Val were added, respectively. All diets were supplemented with Lys, Met, Thr, and Trp to provide the required concentrations of these AA according to the 1998 NRC. Average daily gain and ADFI were similar among pigs fed the positive control, Val-added, and the Val plus Ile-added diets. On wk-2 and wk-4, fecal score was greater (softer feces) in piglets fed the 20% CP level compared with the remaining treatments (P < 0.01). These results indicate that the supplementation of Val alone, or in combination with Ile, to a low-CP piglet diet with adequate levels of Lys, Met, Thr, and Trp is necessary to achieve maximum performance in pigs consuming corn-wheat-soybean meal-based diets.

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