Dietary soluble fibre limits the incidence of epizootic rabbit enteropathy (ERE) and improves the energy and nitrogen balance in low-insoluble fibre diets, while high-insoluble fibre diets seem to favour ERE. This study assessed whether the positive effects of soluble fibre are influenced by the level of insoluble fibre. Four diets (2 × 2 factorial arrangement) were used with two levels of insoluble fibre (314 vs. 393 g/kg DM) and soluble fibre (87 vs. 128 g/kg DM), resulting in four diets with increasing total dietary fibre levels. Growth performance and chemical composition (body and carcass) (28–62 days of age), faecal digestibility (54–57 days of age), and jejunal morphometry functionality (39 days of age) were determined. Mortality was low (<1%) and treatments did not influence it. Insoluble and soluble fibre tended to reduce the growth rate (p ≤ 0.109), body protein, and fat accretion (p = 0.049 to 0.120), but only insoluble fibre impaired feed efficiency (p < 0.001). The efficiency of digestible energy used for growth was impaired with the increase of total dietary fibre (p = 0.027), while that of nitrogen remained majorly unaffected. In conclusion, in healthy rabbits, the increase of either insoluble or soluble fibre had no benefit.

中文翻译：

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膳食不溶性和可溶性纤维对生长中兔子的生长性能，消化率以及氮，能量和矿物质保留效率的影响。

膳食可溶性纤维限制了流行性兔肠病（ERE）的发生，并改善 了低不溶性纤维饮食中的能量和氮平衡，而高不溶性纤维饮食似乎更倾向于ERE。这项研究评估了可溶性纤维的积极作用是否受可溶性纤维水平的影响。使用四种日粮（2×2因数排列）以及两种水平的不溶性纤维（314 vs. 393 g / kg DM）和可溶性纤维（87 vs. 128 g / kg DM），导致四种日粮中总膳食纤维增加水平。成长表现 测定其化学成分（身体和car体）（28-62天），粪便消化率（54-57天）和空肠形态测定功能（39天）。死亡率很低（<1％），治疗也没有影响。不溶性和可溶性纤维倾向于降低生长率（p ≤0.109），身体蛋白质和脂肪增生（p = 0.049至0.120），但只不溶性纤维受损的饲料效率（p <0.001）。随着总膳食纤维的增加，用于生长的可消化能量的效率会受到损害（p = 0.027），而氮的能量主要不受影响。总之，在健康的兔子中，增加不溶性或可溶性纤维没有益处。