Collier R J, Vicini J L, Knight C D, McLaughlin C L, Baile C A
Monsanto Agricultural Company, Animal Sciences Division, St. Louis, MO 63198.
J Nutr. 1992 Mar;122(3 Suppl):855-60. doi: 10.1093/jn/122.suppl_3.855.
Somatotropins increase nitrogen retention, decrease carcass fat and increase lean/fat ratio in growing ruminants and swine. However, responses are much more variable in growing ruminants. Maintenance requirements in both ruminants and swine are increased slightly with somatotropin treatment in conjunction with increased lean mass. This is associated with increases in partial efficiency of protein accretion, resulting in increased efficiency of growth. Additional information is required to accurately assess effects of somatotropin on nutrient requirements for growing ruminants and swine. Future studies should target degradable and nondegradable protein requirements for growing ruminants and the impact of somatotropin on these requirements; definition of dose, pattern and formulation of somatotropin for both ruminants and swine and interaction of somatotropin with other factors affecting feed intake in swine and ruminants.
生长激素能增加生长反刍动物和猪的氮潴留，减少胴体脂肪，并提高瘦肉/脂肪比例。然而，生长反刍动物的反应变化更大。反刍动物和猪在使用生长激素治疗时，维持需要量会随着瘦肉量的增加而略有增加。这与蛋白质沉积部分效率的提高有关，从而提高了生长效率。需要更多信息来准确评估生长激素对生长反刍动物和猪营养需求的影响。未来的研究应针对生长反刍动物的可降解和不可降解蛋白质需求以及生长激素对这些需求的影响；确定反刍动物和猪生长激素的剂量、模式和配方，以及生长激素与影响猪和反刍动物采食量的其他因素之间的相互作用。
