Study On Effects Of Different Lipids On Enrichment Of N-3 Pufa In Chicken

The experiment was conducted to investigate the enrichment of dietary n-3 PUFA in different tissues of broilers, and its effects on growth performance, blood biochemical parameters and meat qualities in broilers, which will provide evidence of theory for producing the chicken meat enriched in EPA, DHA, high in n-3PUFA and suitable n-6: n-3. The orthogonal 3×3 factorial trial was used and 9 kinds of diet were designed. 324 21-day-old Ross308 broilers were divided into 9 groups with 3 replicas of each treatment. The experimental diets were designed to contain 0%,1%,2% double-low rapeseed oil , fish oil and linseed oil. The results were as follows:1) Effects of different lipids onω-3 PUFA Enrichment of different tissues of broilers.The results showed that: (1) The values of n-6/n-3, the amounts of n-3 PUFA and EPA + DHA in muscles of breast , thigh and liver were effected for this order: fish oil> linseed oil > double-low rapeseed oil, three factors have an active role in enrichment of n-3 PUFA. (2) The thigh muscle product combination which rich in EPA, DHA, low value of n-6/n-3, and appropriate n-3PUFA amounts was rapeseed oil 1%, fish oil 2%, linseed oil 1%; The breast muscle product combination was rapeseed oil 1%, fish oil 1%, linseed oil 1%.2) Effects of lipids dietary on growth performance, carcass characteristics,meat qualities and blood biochemical parameters of broilers. (1)The results showed that fish oil levels and linseed oil levels had no effect on final weight, daily gain and feed conversion (P>0.05). The rapeseed oil levels had effect on final weight, daily gain and daily feed intake (P< 0.05), but had no significant effect on feed conversion (P> 0.05); (2) Dietary levels of three factors had no significant effect on slaughtered performance of broilers (P>0.05), however, increased with the level of the three factors , broiler abdomen fat percentage has decreased; Fish oil 2% levels had significant effect on the value of meat color L* (P<0.05) and drip loss (P<0.05), while the rapeseed oil 2%levels had significant effect on shear force (P<0.05). (3) Fish oil levels had significant effect on blood serum TC, HDL-C, LDL-C (P <0.05), blood serum TC, LDL-C levels decreased and HDL-C increased with the amount of fish oil ascended. rapeseed oil and linseed oil levels had no significant differences (P> 0.05).