Veltmann J R, Jensen L S, Rowland G N
Poult Sci. 1986 Jan;65(1):153-63. doi: 10.3382/ps.0650153.
Studies were conducted to determine the nutritional interrelationship between different fat sources, vitamin D3 (vit D) and excess dietary vitamin A (vit A) in the growing chick. Birds tolerated as much as 30 times the recommended level of vit A without compromising performance or skeletal development as measured by bone ash. The response to excess dietary vit A was not influenced by the type of dietary lipid (corn oil, tallow, or poultry oil). No nutritional interaction between vit A (1,500, 15,000, or 45,000 IU/kg) and vit D (100 or 1000 ICU/kg) was detected as measured by growth, bone ash, growth hormone, incidence of tibial dyschondroplasia (TD), or rickets. Serum alkaline phosphatase activity, however, was significantly affected by vit A, vit D, and age of the chicks. The higher vit D level significantly enhanced growth, bone ash, and reduced incidence of rickets, although it had no effect on incidence of TD.
开展了多项研究，以确定生长中的雏鸡体内不同脂肪来源、维生素D3（维生素D）和过量膳食维生素A（维生素A）之间的营养相互关系。雏鸡能够耐受高达推荐水平30倍的维生素A，且不会影响其生产性能或骨骼发育（以骨灰衡量）。过量膳食维生素A的反应不受膳食脂质类型（玉米油、牛油或禽油）的影响。通过生长、骨灰、生长激素、胫骨软骨发育不良（TD）发病率或佝偻病发病率测量，未检测到维生素A（1500、15000或45000国际单位/千克）和维生素D（100或1000国际鸡单位/千克）之间存在营养相互作用。然而，血清碱性磷酸酶活性受到维生素A、维生素D和雏鸡年龄的显著影响。较高的维生素D水平显著促进了生长、骨灰含量，并降低了佝偻病发病率，尽管它对TD发病率没有影响。
