Apparent digestibility of diets with different starch levels for growing rabbits

[摘要] - With the objective to evaluate the effect of dietetic starch on the nutrients apparent digestibility for rabbits in the growing phase, four experimental diets were formulated to contain increasing corn starch levels (23, 28, 33 and 38% total starch levels in dry matter [DM] basis). A total of 20 White New Zealand rabbits were allotted to metabolism cages in a completely randomized design. The results showed a crescent linear effect for the coefficients of apparent digestibility for DM, organic matter (OM), neutral detergent fiber (NDF) and starch as the dietary starch level increased in the experimental diets. The 38% of dietary starch level presented, therefore, the best digestibility of starch (87.26%). No differences were observed for the coefficients of apparent digestibility for crude protein (CP), gross energy (GE) and acid detergent fiber (ADF) at different starch levels. However, the best fat digestibility (89.46%) was verified for the animals fed diet with 23% starch. The rabbits were efficient in digesting purified cornstarch, when this ingredient have a high participation in total carbohydrate fraction of the diets.

[学科分类] 兽医学

[关键词] cornstarch purified;digestibility;nutrition;rabbits     IntroduçãoO uso de cereais como fonte de energia em rações para coelhos é amplamente difundido;pois permite aporte energético suficiente para suprir as necessidades de mantença e produção em ritmo intensivo