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首页> 外文期刊>Czech Journal of Animal Science >Effect of dose of thymol and supplemental flavours or camphor on palatability in a choice feedings study with piglets
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Effect of dose of thymol and supplemental flavours or camphor on palatability in a choice feedings study with piglets

机译：百里香酚和补充香料或樟脑的剂量对仔猪选择喂养研究的适口性的影响

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Thymol’s antimicrobial properties urged researchers to study its effect on animal performance and intestinal health in pigs. However, thymol has the characteristic sharp odor of thyme and a bitter, aromatic, and sometimes burning sensation which may elicit feeding aversions. The objectives in the current study were: (1) to determine the effect of dose of thymol and camphor on palatability and (2) to test the hypothesis that supplemental flavours or camphor, the latter as a known Transient Receptor Potential A1 blocker, could mitigate feed avoidance caused by thymol. Two analogous choice-feeding trials were conducted. Feed intake of the test diet was expressed as proportion of the total intake and tested by means of a one-sample Student’s t -test against a set value of 50%. The preference for feed supplemented with 125, 500, 1250 and 2000 mg/kg thymol was 53.7 ± 6.0% ( P > 0.05), 47.5 ± 5.1% ( P > 0.05), 36.8 ± 4.9% ( P = 0.022), and 3.9 ± 7.9% ( P = 0.005) respectively. When feed containing 2000 mg/kg thymol with either flavour A (containing intense sweeteners) or flavour B (containing the same intense sweeteners and a caramel aroma) was opposed against a control diet, the relative intake of the test diets was 19.9 ± 5.8% and 14.0 ± 4.9% (both P < 0.05) respectively. When animals were offered one of these test diets and a reference diet with 2000 mg/kg thymol, animals exhibited a preference for the feed with 2000 mg/kg thymol + flavour A, but not for the feed with 2000 mg/kg thymol + flavour B. Thus, supplemental flavours containing intense sweeteners partially overcame feed avoidance caused by thymol which was less pronounced when the caramel aroma was present. Exposure to camphor (50 and 200 mg/kg) did not improve feed preference for a diet containing 1250 mg/kg thymol. Thymol’s bitter taste might be largely responsible for the recorded feed refusal at high inclusion rates.
机译：百里香酚的抗菌特性促使研究人员研究其对猪的动物性能和肠道健康的影响。然而，百里香酚具有百里香的特有气味，具有苦味，芳香性，有时会产生灼烧感，这可能引起进食的厌恶。当前研究的目标是：（1）确定百里酚和樟脑剂量对适口性的影响;（2）测试补充香精或樟脑（后者是已知的瞬态受体潜在A1阻滞剂）可以缓解的假说。避免因百里酚引起的进食。进行了两个类似的选择喂养试验。测试饮食的饲料摄入量以占总摄入量的比例表示，并通过一次学生t检验对50％的设定值进行测试。补充125、500、1250和2000 mg / kg百里酚的饲料的偏爱为53.7±6.0％（P> 0.05），47.5±5.1％（P> 0.05），36.8±4.9％（P = 0.022）和3.9分别为±7.9％（P = 0.005）。当含有2000 mg / kg百里酚，风味剂A（包含强力甜味剂）或风味剂B（包含相同的强力甜味剂和焦糖香气）的饲料与对照饮食相对时，测试饮食的相对摄入量为19.9±5.8％和14.0±4.9％（均P <0.05）。当向动物提供这些测试饮食中的一种和含2000 mg / kg百里香酚的参考饮食时，动物表现出偏爱具有2000 mg / kg百里香酚+风味A的饲料，而不是具有2000 mg / kg百里酚+风味的饲料。 B.因此，含有强力甜味剂的补充调味剂部分地克服了由麝香草酚引起的饲料避免，当存在焦糖香气时，麝香草酚不那么明显。暴露于樟脑（50和200 mg / kg）不能改善含有1250 mg / kg百里酚的日粮的饲料偏好。百里酚的苦味可能是造成高添加率下拒绝记录的饲料的主要原因。

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