蛋鸡日粮添加CLA-Ca对蛋黄中CLA和胆固醇含量的影响

选用产蛋量相近的72周龄海兰白蛋鸡840只,随机分为7组,每组40只,重复3次。采用单因素随机试验设计,分别饲喂含1%、2%、3%、4%、5%、6%共轭亚油酸(CLA)的玉米-豆粕型日粮4周,研究了日粮添加CLA-Ca对蛋鸡生产性能、蛋黄中胆固醇含量和CLA含量的影响。结果表明,日粮中添加CLA-Ca降低了蛋鸡的生产性能,可提高蛋黄中CLA含量。日粮CLA水平在1%~6%范围内,CLA水平越高,富集速度越快,富集量越大,CLA最大富集量为692 g/枚鸡蛋,蛋黄脂肪中胆固醇含量随时间的变化总体趋势为先升后降,随日粮CLA浓度的变化趋势为CLA浓度越高,胆固醇的含量越低,但显著高于对照组(P<0.05)。

Effect of Adding CLA-Ca in Layer Dietary on CLA and Cholesterol Contents in Eggyolk

Eight hundred and forty 72-week-old White Leghorn laying hens were randomly divided into seven groups,fed corn-soybean basal diet supplemented with 1%,2%,3%,4%,5% and 6% CLA-Ca respectively,for 4 weeks.It was found that production performance of layers decreased;and the CLA content in eggyolk increased,whose maximum was 692 g per egg.With the more supplement CLA,the more CLA content and the less cholesterol content were in eggyolk.But eggyolk cholesterol was higher than control group significantly(P<0.05).