α-亚麻酸对产蛋鸡胆固醇、甘油三酯含量和脂肪酸组成的影响

Effects of Dietary α-linolenic Acid on Triacylglycerol and Total Cholesterol Contents and Fatty Acids Composition in Laying Hens

采用单因素试验设计,研究了日粮中,添加α-亚麻酸00、.5%、1.0%、2.0%、3.0%和4.0%对海兰褐产蛋鸡饲喂4周后蛋黄、卵泡和肝脏中甘油三酯(TG)和总胆固醇(TC)以及蛋黄脂肪酸(FA)的影响。结果表明:蛋黄中亚油酸、亚麻酸、EPA和DHA的含量与日粮中α-亚麻酸添加量呈显著直线或二次曲线增加(P<0.10);蛋黄、各种卵泡中TC均与日粮中α-亚麻酸添加量显著直线或二次曲线降低(P<0.10);蛋黄、卵泡和肝脏的TG以及肝脏的TC与ALA之间的线性和二次曲线降低均不显著(P>0.10)。可见日粮中添加α-亚麻酸能降低胆固醇,提高鸡蛋中PUFA的含量。

A single-factorial design was employed to investigate the effects of α-linolenic acid （ALA） in different diet on the contents of triacylglycerol （TG）, total cholesterol （TC） in yolk, follicle and liver and fatty acids in yolk of laying hens. The level of α-linolenic acid was O（the control group）, 0.5%, 1.0%, 2.0%, 3.0% and 4.0% respectively. The duration of the study was 28 days .The results revealed that the contents of C18：2, C18：3, EPA C20：5 and DHA C22：6 in yolk in 4th week were significantly linear or quadratic increased with the ALA level（P 〈 0.10） increasing. The TC in yolk, big and middle type follicle were significantly linear or quadratic dicreased with the ALA level （P 〈 0.10）.The TG in yolk ,all type of follicles and liver and TC in liver were decreased with the ALA application not linearly or quadraticly （P 〉 0.10）. Based on the results, supplementation ALA can decrease TC and increase the PUFA contents in the yolks.