首页> 外文期刊>New Zealand journal of agricultural research >Effect of dietary vitamin A on plasma and liver carotenoid concentrations and fat colour in Angus and Angus crossbred cattle
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Effect of dietary vitamin A on plasma and liver carotenoid concentrations and fat colour in Angus and Angus crossbred cattle

机译:日粮维生素A对安格斯和安格斯杂种牛血浆和肝类胡萝卜素浓度及脂肪颜色的影响

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Abstract The effect of dietary vitamin A supplements on plasma carotenoid (PC), liver B‐carotene, and fat carotenoid concentrations, and on fat colour in cattle were determined in three experiments. In Experiment 1, thirteen 2‐year‐old Angus × Friesian steers were grazed on pasture, and 6 of the steers were supplemented daily with 1 × 106 IU vitamin A for 83 days. In Experiment 2, twenty 2‐year‐old Angus crossbred heifers were grazed on pasture with 5 being supplemented daily with 1 × 106 IU and 5 with 2.5 × 106 IU vitamin A for 31 days. Cattle in Experiments 1 and 2 were slaughtered at the end of the experiments, and liver and fat samples were analysed for retinol and carotenoid concentrations respectively in Experiment 1, and liver samples were analysed for both retinol and carotenoid concentrations in Experiment 2. Experiment 3 involved ninety 3‐year‐old Angus steers, 10 of which were slaughtered at the beginning of the experiment, 20 were grazed on pasture, and the remaining 60 steers were fed a diet ...
机译:摘要在三个实验中确定了膳食维生素A补充剂对血浆类胡萝卜素(PC),肝脏B-胡萝卜素和脂肪类胡萝卜素的浓度以及对牛脂肪颜色的影响。在实验1中,在牧场上放牧了13只2岁大的安格斯×弗里斯兰公牛,并在83天中每天补充6个公牛1×106 IU维生素A。在实验2中,在牧场上放牧了20只2岁的安格斯杂交小母牛,每天补充5份1×106 IU和5份2.5×106 IU的维生素A,持续31天。实验1和2的牛在实验结束时被屠宰,实验1中分别分析了肝脏和脂肪样品中视黄醇和类胡萝卜素的浓度,实验2中分析了肝脏样品中视黄醇和类胡萝卜素的浓度。实验开始时宰杀了90只3岁的安格斯公牛,其中10头在牧场上被宰杀,另外20头在牧场上放牧,其余60头公牛以饮食喂养...

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