Effect of dietary fatty acid pattern on growth, body fat composition and antioxidant parameters in broilers.
The effects of dietary fat supplementation on performance, fatty acid (FA) composition of tissues and antioxidant defence system of broilers were studied. Male broilers were placed in 20 floor pens (60 broilers per pen). The broilers were fed by diets with added different energy sources: lard (L); sunflower oil (SFO); soybean oil (SBO); and linseed oil (LSO). The treatments did not modify significantly growth performance and feed intake of the broilers. There was no effect of dietary FA pattern on reduced glutathione level and glutathione peroxidase activity of plasma, erythrocyte and liver samples. However, higher PUFA content of the diet resulted in a significant increase in malondialdehyde level of erythrocytes and liver. The broilers fed LSO diet more effectively maintained their antioxidant status with enhanced plasma radical scavenger capacity. FA composition in tissues reflected the FA pattern of the diets, although proportion of FAs with four or more double bonds was metabolic specific. LSO diet increased the level of C18:3, C20:5 and C22:6 in tissue lipids in relation to L, SFO and SBO diets. Significantly increased plasma radical scavenging capacity in concert with the enhanced C20:5 and C22:6 proportion in liver and muscle during LSO feeding indicate metabolic changes to counteract the oxidative injury. This may be related to the compounds produced after different biochemical pathways of n-6 and n-3 FAs.
Fébel
H
H
Research Institute for Animal Breeding and Nutrition, Herceghalom, Hungary. hedvig.febel@atk.hu
Mézes
M
M
Pálfy
T
T
Hermán
A
A
Gundel
J
J
Lugasi
A
A
Balogh
K
K
Kocsis
I
I
Blázovics
A
A
D000273:Adipose Tissue / Q000378:metabolism; D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D000975:Antioxidants / Q000378:metabolism*; D001823:Body Composition / Q000187:drug effects* / Q000502:physiology; D002645:Chickens / Q000254:growth & development*; D004041:Dietary Fats / Q000008:administration & dosage* / Q000494:pharmacology; D004042:Dietary Fats, Unsaturated / Q000008:administration & dosage* / Q000494:pharmacology; D002149:Energy Intake; D005227:Fatty Acids / Q000032:analysis / Q000378:metabolism*; D008043:Linseed Oil / Q000008:administration & dosage; D008297:Male; D010938:Plant Oils / Q000008:administration & dosage; D011897:Random Allocation; D013024:Soybean Oil / Q000008:administration & dosage; D000074242:Sunflower Oil; D014018:Tissue Distribution
D000975:Antioxidants; D004041:Dietary Fats; D004042:Dietary Fats, Unsaturated; D005227:Fatty Acids; D010938:Plant Oils; D000074242:Sunflower Oil; D013024:Soybean Oil; D008043:Linseed Oil