饲粮不同粗蛋白质水平对育肥羔羊小肠氨基酸流量及吸收率的影响

发布时间：2018-01-14 11:07

  本文关键词：饲粮不同粗蛋白质水平对育肥羔羊小肠氨基酸流量及吸收率的影响　出处：《动物营养学报》2016年04期 　论文类型：期刊论文

  更多相关文章： 瘤胃降解蛋白质 氨基酸 流量 吸收率 哈萨克羊

【摘要】：本研究旨在比较饲粮不同粗蛋白质(CP)水平对育肥羔羊小肠氨基酸(AA)流量及吸收率的影响。选用体重(30.0±3.7)kg,安装有瘤胃、十二指肠近端和回肠末端瘘管的3只哈萨克羊公羔为试验动物,采用3×3拉丁方试验设计,各处理饲粮CP水平分别为11.00%、12.00%和13.00%;预试期10 d,正试期10 d。采用镱锕(Yb-Ac)、锂铬乙二胺四乙酸(Li Cr-EDTA)分别作为消化道固相和液相食糜标记物测定小肠食糜流量。结果表明:提高饲粮CP水平可增加羔羊氮进食量、表观消化率和氮沉积,13.00%CP处理显著高于11.00%CP处理(P0.05),并有增加饲粮干物质(DM)、有机物(OM)和中性洗涤纤维(NDF)表观消化率的趋势(0.05≤P0.10),但不影响酸性洗涤纤维(ADF)的表观消化率(P0.05)。提高饲粮CP水平虽然对小肠真食糜流量及氨基酸吸收率无显著性影响(P0.05),但十二指肠氮、总氨基酸(TAA)流量以及必需氨基酸(EAA)中精氨酸(Arg)、组氨酸(His)和赖氨酸(Lys)的吸收率在数值上有所增加。结果显示,提高饲粮CP水平有提高消化率、小肠食糜流量及氨基酸吸收率的潜在趋势。
[Abstract]:The purpose of this study was to compare the effects of dietary crude protein (CPP) levels on the small intestinal amino acid (AA) flow and absorption rate of fattening lambs. Three Kazak male lambs with proximal duodenum and ileal end fistula were used as experimental animals. The CP levels of each diet were 11.00%, respectively, in a 3 脳 3 Latin square design. 12.00% and 13.00; Ytterbium Actinide Yb-Actinide was used in the pre-test period of 10 days and in the current period of 10 days. Lithium-chromium ethylenediamine tetraacetate LiCr-EDTAwas used as a solid and liquid phase marker for the determination of intestinal chyme flow. The results showed that increasing dietary CP level could increase the nitrogen intake of lambs. Apparent digestibility and nitrogen deposition of 13.00% CP were significantly higher than that of 11.00 CP treatment (P0.05N), and increased dietary dry matter (DMM). The tendency of apparent digestibility of organic matter (Om) and neutral washing fiber (NDF) was 0.05 鈮，

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