本试验旨在评定肉兔谷草表观消化能及营养物质表观消化率。试验选择42只70~80日龄平均体重(1.29±0.12) kg的肉兔,随机分为7组,每组6个重复。试验饲粮用套算法配制,来自2个地区的谷草替代基础饲粮的比例分别为20%、15%和10%。采用全收粪法进行消化试验,预试期和正试期各5 d。结果表明:谷草中的粗蛋白质(CP)、粗纤维(CF)、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)、粗灰分(Ash)、钙(Ca)和磷(P)的含量平均值分别为7.35%、34.96%、67.20%、46.06%、17.85%、1.01%和0.16%;表观消化率平均值分别为81.98%、18.70%、8.83%、17.82%、22.23%、68.92%和25.03%。不同地区的谷草除了ADF和Ca的表观消化率差异显著(P＜0.05)外,其余各指标均差异不显著(P＞0.05)。谷草的平均总能(GE)为16.39 MJ/kg,来自辽宁省彰武地区的谷草表观消化能(ADE)比来自辽宁省凌源地区的谷草ADE高27.66%(P＞0.05)。由此可知,肉兔谷草ADE及CF、NDF、ADF的表观消化率较低,CP和Ca的表观消化率较高。

This experiment was designed to assess the apparent digestible energy and nutrient apparent digestibility of millet straw for meat rabbits. Forty-two 70 to 80 day-old meat rabbits with an average body weight of (1.29±0.12) kg were randomly allocated into 7 groups with 6 replicates per group. The experimental diets were prepared by substitution method, and millet straw from Zhangwu and Lingyuan regions of Liaoning province was substituted with basal diet at ratios of 20%, 15% and 10%, respectively. Digestion experiment was conducted by the method of total fecal collection, and both pre-trial and trial period lasted for 5 days. The results showed that the average contents of crude protein (CP), crude fiber (CF), neutral detergent fiber (NDF), acid detergent fiber (ADF), crude ash (Ash), calcium (Ca) and total phosphorus (P) in millet straw were 7.35%, 34.96%, 67.20%, 46.06%, 17.85%, 1.01% and 0.16%; and the average apparent digestibility of CP, CF, NDF, ADF, Ash, Ca and P were 81.98%, 18.70%, 8.83%, 17.82%, 22.23%, 68.92% and 25.03%, respectively. The apparent digestibility of ADF and Ca was significant difference between Zhangwu and Lingyuan regions (P＜0.05), however, the other nutrient apparent digestibility had no significant difference between Zhangwu and Lingyuan regions (P＞0.05). The average gross energy (GE) in millet straw was 16.39 MJ/k, the average apparent digestible energy (ADE)in millet straw from Zhangwu region was higher than that from Lingyuan region by 27.66% (P＞0.05). In conclusion, the apparent digestibility of GE, CF, NDF and ADF is lower, and the apparent digestibility of CP and Ca is higher in millet straw for meat rabbits.