Addition of probiotic to feeds with different energy and ADF content in rabbits. 1. Effect on the digestive organs

 A. Kermauner, M. Struklec


Effects of feed composition, addition of the probiotic Acid-Pak 4-Way (AP4W), sex, age at slaughtering (53 or 67 d.) and interactions between feed and AP4W, age and feed, age and AP4W and age and sex on gastrointestinal (GI) tract weight and dressing percentage of 84 weaned New Zealand White rabbits were studied. Three complete feed mixtures with different levels of digestible energy (DE, MJ/kg of feed) and ADF content (g/kg of dry matter-DM) were tested (feed I had recommended DE and high ADF content: 9.22 MJ DE and 299 g ADF; feed II had 11.60 MJ DE and 254 g ADF; feed III had high energy and recommended ADF content: 13.14 MJ DE and 187 g ADF), each with and without the addition of 0.5 % AP4W. High-energy/recommended-ADF diet (feed III) increased  carcass weight (1 : 970ª ; II : ª976ª ; III :  1005bg; P≤05), improved dressing percentage (1 : 50.2a , II : 50.6a , III : 52.0b %, P≤0.05), decreased GI weight (1 : 411.1ab, II : 420.2ª , III : 391.3b g, P≤0.05) and decreased caecum weight (I 151.3a , II 148.8a , III 133.7o g, P≤0.05). The proportions of small intestine and caecum (of total GI weight) differed between feed I and III (% of small int.: 20.2 vs. 22.3; % of caecum: 36.9 vs. 34.0, P≤0.05). The effect of AP4W was observed only in the decreased proportion of stomach and increased proportion of caecum (% of stomach: 28.0 vs. 29.9, % of caecum: 36.2 vs. 34.8 %, (P≤ 0.05). Sex significantly (P≤0.05) influenced caecum weight (females: 151.1, males 138.2 g), % of caecum (f. 36.6, m. 34.4 %) and % of small intestine (f. 20.7, m. 21.7 %). Older rabbits had (P≤0.05) better dressing percentage (52.0 vs. 49.9 %), higher carcass weight (1007 vs. 961 g), lower GI tract (392.7 vs. 422.4 g) and small intestine weight (80.0 vs. 92.1 g), higher weight and % of large intestine (63.0 vs. 54.8 g, 14.9 vs. 13.8 %).

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1. Effect of diet supplementation with live yeast Saccharomyces cerevisiae on growth performance, caecal ecosystem and health of growing rabbits
T. Belhassen, A. Bonai, ZS. Gerencsér, ZS. Matics, T. Tuboly, R. Bergaoui, M. Kovacs
World Rabbit Science  vol: 24  issue: 3  first page: 191  year: 2016  
doi: 10.4995/wrs.2016.3991


 Universitat Politècnica de València


Official journal of the World Rabbit Science Association (WRSA)


e-ISSN: 1989-8886     ISSN: 1257-5011