大针茅草产品对肉羊营养物质消化代谢的影响

发布时间：2018-07-14 15:30

【摘要】：【目的】研究大针茅草产品对肉羊营养物质消化代谢的影响,为确定大针茅的最适饲喂形态提供科学依据。【方法】通过对比试验设计,将体质量相近、健康状况良好的12只8月龄乌珠穆沁公羊随机分为4组,各组试验羊分别饲喂大针茅干草、大针茅草颗粒、大针茅草块、大针茅草粉,为期17d的饲养试验(其中预试期10d)结束后,每组选择3只羊按照全收粪、尿法进行消化代谢试验,测定营养物质表观消化率和氮平衡的相应指标。【结果】大针茅草颗粒采食率和干物质(DM)表观消化率最高,与大针茅干草及大针茅草粉差异显著(P0.05);大针茅草颗粒粗蛋白质(CP)表观消化率显著高于其他处理(P0.05);大针茅草颗粒中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)表观消化率最高,显著高于大针茅草粉(P0.05)。大针茅草颗粒的氮吸收率和总氮利用率平均为(72.11±0.02)%和(51.79±0.04)%,均显著高于其他处理(P0.05),大针茅草粉的氮吸收率和总氮利用率均最低,大针茅干草与大针茅草块之间无显著差异(P0.05)。【结论】饲喂大针茅草颗粒处理的采食率、表观消化率、氮吸收率和总氮利用率均显著高于其他处理,是乌珠穆沁羊的最适饲喂形态。
[Abstract]:[objective] to study the effect of Stipa grandis product on nutrient digestibility and metabolism of meat sheep, and to provide scientific basis for determining the optimum feeding morphology of Stipa grandis. Twelve 8-month-old Ujimuqin rams were randomly divided into 4 groups. The experimental sheep in each group were fed with Stipa arundinacea, Stipa granulosa, clover and powder, respectively. After the 17-day feeding trial (10 days pretest), three sheep were selected for digestion and metabolism test in accordance with the method of collecting feces and urine in each group. The apparent digestibility of nutrients and the corresponding indexes of nitrogen balance were measured. [results] the feed intake rate and the apparent digestibility of dry matter (DM) were the highest. The apparent digestibility of CP was significantly higher than that of other treatments (P0.05), and the apparent digestibility of neutral detergent fiber (NDF) and acid detergent fiber (ADF) was the highest. It was significantly higher than thatch powder (P0.05). The average nitrogen absorptivity and total nitrogen utilization efficiency were (72.11 卤0.02)% and (51.79 卤0.04), which were significantly higher than those of other treatments (P0.05). [conclusion] the feeding rate, apparent digestibility, nitrogen absorption rate and total nitrogen utilization efficiency of the treatments fed with the pellets were significantly higher than those of the other treatments, but there was no significant difference between Stipa grandis and Stipa grandis (P0.05). [conclusion] the feeding rate, apparent digestibility, nitrogen absorption rate and total nitrogen utilization efficiency of the treatment were significantly higher than those of other treatments. It is the most suitable feeding form for Uzhimuqin sheep.
【作者单位】：内蒙古农业大学草原与资源环境学院;
【基金】：国家现代牧草产业技术体系项目(CARS-35) 国家自然科学基金项目“内蒙古典型草原天然牧草青贮饲料品质优化调控机制研究”(31460638)
【分类号】：S826.5

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