Dietary fatty acid profile: effects on caecal fermentation and performance of young and fattening rabbits

摘要: The present work was performed to study the effect of dietary inclusion different fatty acid combinations (saturated, n-3 and n-6 polyunsaturated acids; PUFA) on caecal fermentation activity, feed intake, growth rate efficiency young rabbits around weaning (17 44 d) fattening (28 63 d age). Five diets were formulated using same raw materials including 3% lard (A diet, rich in saturated fat), sunflower oil (S PUFA), linseed (L at 1:1 (SA diet), or (LA diet). In first trial, 5 rabbit performance evaluated a period from 28 age, with 490 allocated individual cages; mortality rates measured 1670 (750 cages 920 collective cages, 8 rabbits/cage). second 120 used 17 weaned d, randomly fed A, S L diets, evaluating gut weight caecum activity. use animal fat vegetable richness PUFA oils had no significant intake (130 g dry matter/d) (45.5 g/d), but diet improved conversion (2.79 for vs. 2.87 rest diets; P<0.01). Mortality lower when included (34 37% respectively 45% A diet; P<0.05). Feed increased quickly only small occasional differences recorded rabbits, favour receiving 21 (P<0.05) 30 (P<0.05). Caecal traits age similar groups, although butyric concentration content lowest diet.