Skin pigmentation evaluation in broilers fed natural and synthetic pigments
Skin pigmentation evaluation in broilers fed natural and synthetic pigments
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DOI：
10.1093/ps/84.1.143
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发表时间：
2005-01-01
期刊：
影响因子：
4.4
通讯作者：
Sams, AR
中科院分区：
文献类型：
--
作者：
Castañeda, MP;Hirschler, EM;Sams, AR
在美国和墨西哥，肉仔鸡胴体的皮肤颜色很重要。本研究评估了天然和合成色素在肉鸡日粮中的商业水平。鸟类被喂食低水平或高水平的天然或合成色素，模拟美国和墨西哥的商业实践。在活体生产期间（3至7周龄）以及屠宰和冷藏后测量皮肤颜色。天然颜料始终具有比合成颜料更大的皮肤B* 值（黄度）。无论来源如何，高水平产生的皮肤B* 值大于低水平。合成色素在皮肤B* 中的增加较慢，但在7周时达到与天然低水平相同的水平。由于色素来源或水平或鸟的年龄，皮肤a* 值（发红）没有差异。到7周，所有的色素来源接近高原水平的血液，但合成色素饮食产生更高的血液水平的黄色和红色色素比天然色素饮食。加工强化了皮肤的黄度，减少了皮肤的发红。这些数据表明，虽然合成色素可能比天然色素更容易被吸收，但天然色素在增加皮肤黄度方面更有效，并且每种色素来源的高水平和低水平之间只有很小的差异。这一发现可能会减少色素的使用和饲料成本，以获得消费者相同的皮肤接受度。
Broiler carcass skin color is important in the United States and Mexico. This study evaluated the use of natural and synthetic pigments in broiler diets at commercial levels. Birds were fed natural or synthetic pigments at low or high levels, simulating US and Mexican commercial practices. Skin color was measured during live production (3 to 7 wk of age) and after slaughter and chilling. The natural pigments had consistently greater skin b* values (yellowness) than the synthetic pigments. The high levels produced greater skin b* values than the low levels, regardless of source. The synthetic pigments had a slower increase in skin b* but reached the same level as the natural low by 7 wk. There was no difference in skin a* values (redness) due to pigment source or level or the age of the bird. By 7 wk, all pigment sources approached plateau levels in the blood, but the synthetic pigment diet produced higher blood levels of yellow and red pigments than the natural pigment diets. Processing intensified skin yellowness and reduced skin redness. These data suggest that although synthetic pigments might have been absorbed better than natural ones, natural pigments were more efficient at increasing skin yellowness and there were only small differences between high and low levels for each pigment source. This finding may allow reduction in pigment use and feed cost to achieve the same skin acceptance by the consumer.