不同油脂对黄羽肉鸡生产性能、肉品质及 肌肉脂肪酸组成的影响.

[Objectives]The paper aimed to study the effects of feeding different types of dietary oil on production performance, meat quality and muscle fatty acid composition of yellow-feathered broilers. [Methods]A total of 432 1-day-old fast large yellow-feathered broilers (green-footed hens),half male and half female, were selected and randomly divided into 4 groups based on the principle of similar body weight, with 6 replicates in each group and 18 birds in each replicate. The groups were control group (soybean oil),palm oil group, cottonseed oil group and lard group. The experiment lasted for 52 days and was divided into 3 feeding stages, 1-20 days old, 21-40 days old and 41-52 days old, respectively. The amount of oil added in the first stage, second stage and third stage was 1.8%,3.2%,4.2%,respectively. The body weights of broilers at the beginning of the experiment (1-day-old),20 days old, 40 days old and at the end of the experiment (52 days old) were recorded, and the weekly feed consumption of each cage broiler was recorded. The indexes of meat quality and fatty acid composition were detected. [Results]Compared with the control group, addition with palm oil or cottonseed oil had no significant effect on the growth performance of yellow-feathered broilers during 1-40 day period (P＞0.05),but greatly decreased the daily feed intake (P＜0.05) and body wight during 41-52 day period (P＜0.01) . In addition, cottonseed oil supplementation significantly increased muscle pH45 min (P＜0.05) . The addition of palm oil, cottonseed oil or lard significantly reduced polyunsaturated fatty acids (PUFA) content in the breast muscle (P＜0.01) and significantly increased saturated fatty acids (SFA) content in the leg muscle (P＜0.01) . [Conclusions]Different oil additions (soybean oil, palm oil, cottonseed oil or lard) had no significant effect on the production performance and meat quality of yellow-feathered broilers in the early stages, supplementation with palm oil, cottonseed oil or lard significantly increased the SFA content of leg muscle and significantly decreased the PUFA content of breast and leg muscle of yellow-feathered broilers compared with the addition of soybean oil. [ABSTRACT FROM AUTHOR]