共查询到19条相似文献,搜索用时 109 毫秒
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近年来,随着人们消费水平的提高,鸡蛋中胆固醇、多不饱和脂肪酸(PUFA)的含量以及蛋黄颜色的深浅已成为衡量蛋品质的重要指标,直接影响着市场的需求。研究发现,通过营养代谢调控手段,能改善蛋品质,生产出胆固醇含量低、PUFA含量高的鸡蛋。现将影响鸡蛋胆固醇含量的因素报道如下。1能量物质大量研究表明,蛋鸡日粮中能量或脂肪的浓度过高会使鸡蛋中胆固醇的含量增加。当机体能量贮备足够时,过量摄入能量会表现为体重增加,胆固醇的生物合成提高。2脂类由于日粮中脂肪和胆固醇与家禽机体胆固醇的代谢密切相关,饲料中脂肪、脂肪酸的组成和含量… 相似文献
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鸡蛋的胆固醇和多不饱和脂肪酸(PUFA)的含量已成为衡量蛋品质的重要指标,蛋黄中胆固醇含量约占蛋黄重的4%。约为200-250mg/枚。如此高的胆固醇含量直接影响着蛋鸡养殖业的发展和蛋产品的市场容量需求。研究发现,通过营养代谢调控手段,即选用适当的方法来降低鸡蛋中胆固醇的含量,进而能生产出胆田醇含量低、多不饱和脂肪酸(PUFA)含量高的鸡蛋来满足消费者的需求。 相似文献
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鸡蛋中胆固醇含量的营养调控措施 总被引:5,自引:0,他引:5
随着人们生活水平的不断提高,其膳食结构也在不断变化,除了要求食品营养好外,开始逐渐强调绿色保健化。鸡蛋作为人们餐桌上的常见食品,胆固醇的含量日趋成为消费者和研究者关心的问题。笔者认为,通过鸡日粮营养的调控,可以一定程度的降低鸡蛋的胆固醇含量,适应社会的需求。本文 相似文献
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功能性鸡蛋是指除营养丰富味美之外.还有调节人体生理活动功能的鸡蛋。近年来,国内外利用产蛋鸡高产的特性,开发了许多新型营养保健蛋.对治疗很多疾病起到了积极的作用。本文就几种功能性鸡蛋的作用及生产方法作一综述。 相似文献
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Two grazing trials using 'sentinel' lambs were undertaken to measure changes in the availability of eggs within 30 metres of deposition by dogs infected with Taenia hydatigena. In the first trial the experimental pasture was divided into nine equal plots; in the second trial, each of the nine plots was divided into sub-plots. In each trial, infected dogs were placed on the pasture for 10 days. Lambs were then grazed for 10 days immediately, 36 days and 56 days after the dogs had been removed. Changes in the dispersion pattern of the eggs over time and space were assessed by examination of the lambs for cysts at autopsy. In both trials, eggs spread radially within the grazing zone within 10 days, but 36 days after the removal of the dogs, their availability to the lambs was markedly reduced. In the first trial at five weeks, the height of grass (between 3 cm and 15 cm) did not modify egg availability. In both trials, despite differences in rainfall affecting the growth of grass and associated factors similar egg losses occurred. 相似文献
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Teck-Chwen LOH Fang-Ling LAW Yong-Meng GOH Hooi-Ling FOO Idrus ZULKIFLI 《Animal Science Journal》2009,80(1):27-33
This study was conducted to investigate the effects of feeding fermented fish (FF) to layers on laying performance, and polyunsaturated fatty acid and cholesterol levels in eggs and plasma. A total of 96, 13-week-old Babcock B380 pullets were used in this study. They were randomly assigned to four numerically equal groups with eight replicates per treatment, three birds per replicate. All the birds were housed in individual cages. The dietary treatments were: Control diet, without FF; FF3 diet containing 3% (w/w) FF, FF6 diet containing 6% (w/w) FF and FF9 diet containing 9% (w/w) FF. The study was carried out for 16 weeks inclusive of two weeks of adjustment. Weekly feed intake and egg production were recorded. Blood plasma cholesterol and fatty acid profiles were assayed at the end of the experiment. FF did not enhance ( P > 0.05) egg mass but ( P < 0.05) decreased egg weight slightly. However, egg yolk cholesterol and plasma cholesterol concentrations were reduced ( P < 0.05) by FF. The n-6:n-3 fatty acids ratio in the egg yolk (Control = 7.9, FF9 = 6.2) and plasma (Control = 10.6, FF9 = 6.2) were decreased by feeding FF. Moreover, FF was able to increase ( P < 0.05) the docosahexaenoic acid (DHA) concentrations in egg yolk and plasma. In conclusion, this study demonstrated that FF increased DHA and reduced egg yolk cholesterol in poultry eggs. 相似文献