Effect of the high fibre (8%) layer diets on digestive tract integrity

Cristinel Vasile Panaite, Dumitru Dragotoiu, Rodica Diana Criste, Tatiana Dumitra Panaite, Maria Gabriela Cornescu

Abstract


Although fibre is regarded by many nutritionists as a mere diluent of poultry diets, new experimental evidences suggest that the dietary fibre positively influences the digestive tract integrity. A 5-week feeding trial was conducted on 200 Tetra layers (28 weeks) assigned to 5 groups, housed in an experimental hall under controlled environmental conditions (temperature: 23.81±1.54°C; humidity: 64.76±11.93%), and 16h/24h light regimen. The control group (C) received a conventional diet (2780 kcal/kg metabolizable energy; 17.5% crude protein; 4.39% crude fibre). Compared to C formulation, E1 formulation included 23% sunflower meal, which increased the dietary fibre (8%). The other 3 experimental diet formulations differed from E1 formulation by the presence of phytoadditives or cellulolytic enzymes: E2 (0.015% enzyme); E3 (0.015% phytoadditive) and E4 (0.015% enzyme+0.015% phytoadditive). At the end of the experiment 30 hens were sacrificed (6 hens/group) to obtain jejunum samples for histological parameters. The results of the intestinal measurements revealed significantly (P≤0.05) lower values for experimental groups compared to C group. The lowest values registered for E1 group: villus height (583±99.74µm) and crypt depth (126±36.19µm). Mucosa thickness increased significantly (P≤0.05) in E3 group (275±70 µm) compared to C group (173±66.08 µm).


Keywords


laying hens, crude fibre, enzyme, intestinal villi

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LUCRARI STIINTIFICE ZOOTEHNIE SI BIOTEHNOLOGII (SCIENTIFIC PAPERS ANIMAL SCIENCE AND BIOTECHNOLOGIES)

ISSN print 1841 - 9364
ISSN online 2344 - 4576
ISSN-L  1841 - 9364
(former ISSN 1221-5287, E-ISSN 1841-9364)

PUBLISHER: AGROPRINT Timisoara, Romania
PAPER ACCESS: Full text articles available for free
FREQUENCY: Semiannual
PUBLICATION LANGUAGE: English
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Banat´s University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara
Bioengineering Faculty of Animal Resources
300645, Timişoara, Calea Aradului 119, Romania

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