不同加工方式针茅草对绵羊干物质采食、消化及瘤胃内环境的影响

发布时间：2018-05-26 10:18

本文选题：针茅草 + 草颗粒　；参考：《动物营养学报》2017年05期

【摘要】：本试验旨在研究针茅草的不同加工方式对绵羊采食、消化及瘤胃内环境的影响。选用体重[(45±2)kg]、年龄(1.5~2.0岁)相近安装有永久性瘤胃瘘管的乌珠穆沁羯羊48只,随机分为4组,每组12只,分析干草、草颗粒、草块、草粉4种加工方式的针茅草对绵羊干物质采食量、表观消化率及瘤胃液pH及总氮、氨氮、总可利用氮、挥发性脂肪酸浓度的影响。预试期10 d,正试期7 d。结果表明:1)针茅草颗粒的干物质采食量及表观消化率显著高于其他组(P0.05)。2)与其他各组相比,针茅草颗粒组的绵羊食后1 h瘤胃液pH显著降低(P0.05),总氮、氨氮和总可利用氮浓度较高。3)草颗粒组的瘤胃液总挥发性脂肪酸浓度显著高于干草和草粉组(P0.05)。由此可见,针茅草颗粒的干物质采食量、表观消化率以及在绵羊瘤胃内的发酵指标均较优,是饲喂绵羊的最佳利用形态。
[Abstract]:The purpose of this study was to study the effects of different processing methods on feed intake, digestion and rumen environment of sheep. A total of 48 sheep with permanent rumen fistula were randomly divided into 4 groups, 12 in each group. Hay, grass granules and grass blocks were analyzed. Effects of four processing methods on dry matter intake, apparent digestibility, rumen pH, total nitrogen, ammonia nitrogen, total available nitrogen and concentration of volatile fatty acids in sheep. The pre-test period was 10 days and the positive test period was 7 days. The results showed that the dry matter intake and apparent digestibility of Neymopodium chinensis granules were significantly higher than those of other groups (P0.05U 路2). Compared with other groups, the rumen fluid pH and total nitrogen (TN) were significantly decreased 1 h after feeding. The concentration of total volatile fatty acids in rumen fluid in the group of ammonia nitrogen and total available nitrogen was higher than that in the group of hay and straw powder. Therefore, the dry matter intake, apparent digestibility and fermentation index in rumen of sheep were better, which was the best utilization form of feeding sheep.
【作者单位】：内蒙古农业大学草原与资源环境学院草地资源教育部重点实验室;内蒙古自治区农牧业科学院;
【基金】：农业部公益性行业项目“干旱牧区天然打草场培育及利用技术研究与示范”(201303060) 公益性行业(农业)科研专项“饲草青贮工艺技术及配套设施装备的研究与示范”(201303061)
【分类号】：S826.5

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