Apports de cellulose dans l'alimentation du lapin en croissance. I. Conséquences sur la digestion et le transit

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Abstract

The effect of the level and botanical origin of the dietary cellulose VS (Van Soest, ADF-ADL) on the faecal digestibility and rate of passage in growing rabbits (31-53 days of age) was studied using five diets (table I): a control diet (RO) with a low cellulose content (9.3%) and four diets with increasing cellulose content (12.4 and 15.9%) (table III) provided either by wheat straw and alfalfa (diets P1 and P2) or by soya bean hulls and alfalfa (diets CS1 and CS2). Cellulose was replaced mainly by starch without change in the dietary lignin and hem/cellulose levels. Organic matter digestibility (%) increased linearly as the level of cellulose decreased (+1.7 point per point of cellulose). Crude protein digestibility was similar between P2 and RO (mean 78%) but increased by 12points (P < 0.01) between CS2 and RO. Reducing the level of cellulose (-40%) decreased by 50% the intake of cellulose and led to a higher neutral detergent fibre (NDF) digestibility (+25%). However, the quantity of NDF digested daily (mean 9 g/day) was unchanged either by the level or by the origin of the cellulose. As the intake of cellulose was reduced, the whole tract mean retention time increased (mean, +3 h), but more for the diets P (13.4 to 18.5 for diets P2 and R0, respectively) than for the diets CS (15.4 h for CS2). In the caecocolic compartments, the rate of passage of the fine particles was unaffected, while the transit of raw particles tended to be shorter (P = 0.10) for the diet CS2. The minimum transit time (TTm) was longer (+2 h) according to the reduction of the level of cellulose without a significant effect of the cellulose origin.

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Gidenne, T., & Perez, J. M. (1996). Apports de cellulose dans l’alimentation du lapin en croissance. I. Conséquences sur la digestion et le transit. Animal Research, 45(4), 289–298. https://doi.org/10.1051/animres:19960401

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