Digestibilidade de diferentes frações fibrosas de dietas com alta e baixa fibra para frangos de corte sob arraçoamento com tempo restrito

• Main Authors: Warpechowski , Marson B. (Universidade Federal do Paraná, Curitiba(Brésil). Departement de zootecnie), Dubois , Serge (INRA , Saint Gilles (France). UMR 1079 Systèmes d'Elevage, Nutrition Animale et Humaine), Jaguelin-Pieraud , Yolande (INRA , Saint Gilles (France). UMR 1079 Systèmes d'Elevage, Nutrition Animale et Humaine), Van Milgen , Jacob (INRA , Saint Gilles (France). UMR 1079 Systèmes d'Elevage, Nutrition Animale et Humaine), Kessler , Alexandre M. (Universidade Federal do Rio Grande do Sul, Porto Alegre(France).), Carré , Bernard (INRA , Nouzilly (France). UR 0083 Recherches Avicoles), Noblet , Jean (INRA , Saint Gilles (France). UMR 1079 Systèmes d'Elevage, Nutrition Animale et Humaine)
• Format: Conference Proceeding
• Language: English
• Published: 2010
• Subjects: alimentation animale; digestibilité; fibre alimentaire; gallus gallus; paroi cellulaire; poulet; poulet de chair

To evaluate the digestibility of several fiber measures, three replicates of eight broilers of four-weeks age and three replicates of six broilers of five-weeks age, deriving from three Ross broilers lots, logged in metabolic cages and on four daily time-restricted 35 min feeding were used. Two diets were used, normal and fibrous, with similar nutrients to energy ratios, based on corn, wheat, soybean meal and its fibrous by-products. Block randomized design was adopted. The fibrous diet, with two times more fibre, resulted in smaller energy and protein utilization (P<0,02). Crude fiber and neutral detergent fiber presented do not trustful digestibility coefficients (DC), with high variation coefficients (218 and 56%, resp.) and negative values. The DC was high and different between diets for the total dietary fiber (32 vs. 18%, P<0,01) and neutral detergent fiber (25 vs. 21%, P<0,07). The water insoluble cell wall CD was small, without difference between diets (14 vs. 13%, P>0,66), and this measure was considered the best to express the dietary fiber for broilers.