6种饲料原料瘤胃降解特性和瘤胃非降解蛋白质的小肠消化率
发布时间：2018-12-19 17:56
【摘要】：本试验旨在研究新疆地区玉米青贮、棉籽壳、苜蓿草粉、苜蓿干草、葡萄籽粕、蕃茄酱渣6种奶牛饲料原料的瘤胃降解特性和瘤胃非降解蛋白质(RUP)的小肠消化率(Idg)。选用3头装有永久性瘤胃瘘管的泌乳荷斯坦奶牛,采用尼龙袋法和改进三步体外法测定饲料原料的干物质(DM)、粗蛋白质(CP)、中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)的瘤胃降解特性以及RUP的Idg和小肠可消化粗蛋白质(IDCP)含量。结果表明:1)苜蓿草粉和玉米青贮的DM有效降解率最高,显著高于次之的苜蓿干草、番茄酱渣(P0.05),葡萄籽粕、棉籽壳最低,显著低于其他原料(P0.05);CP有效降解率为番茄酱渣苜蓿草粉玉米青贮苜蓿干草棉籽壳葡萄籽粕,各原料间差异显著(P0.05);NDF有效降解率为玉米青贮苜蓿草粉棉籽壳苜蓿干草番茄酱渣葡萄籽粕,各组饲料原料间差异显著(P0.05);ADF有效降解率为玉米青贮棉籽壳苜蓿干草番茄酱渣苜蓿草粉葡萄籽粕,各组饲料原料间差异显著(P0.05)。2)苜蓿草粉RUP的Idg和IDCP含量最高,Idg显著高于依次降低的苜蓿干草、玉米青贮、番茄酱渣、葡萄籽粕、棉籽壳(P0.05),IDCP含量与苜蓿干草差异不显著(P0.05),显著高于依次降低的玉米青贮、番茄酱渣、葡萄籽粕、棉籽壳(P0.05)。综上所述,不同饲料原料具有不同的瘤胃降解特性,进入小肠IDCP的含量也不同。玉米青贮的DM、NDF和ADF在瘤胃的有效降解率较高,苜蓿草粉RUP的Idg较高,苜蓿草粉和苜蓿干草的IDCP含量较高。
[Abstract]:The purpose of this study was to study the rumen degradation characteristics of corn silage, cottonseed husk, alfalfa meal, alfalfa hay, grape seed meal and tomato sauce residue as well as the digestibility of rumen non-degradable protein (RUP) in small intestine. Three lactating Holstein cows with permanent rumen fistula were used to determine dry matter (DM), crude protein (CP), by nylon bag method and improved three-step method in vitro. The rumen degradation characteristics of neutral detergent fiber (NDF) and acid detergent fiber (ADF) and the contents of Idg of RUP and digestible crude protein (IDCP) of small intestine were studied. The results showed that: 1) the DM degradation rate of alfalfa meal and corn silage was the highest, significantly higher than that of alfalfa hay, tomato sauce residue (P0.05), grape seed meal and cottonseed shell (P0.05), significantly lower than other raw materials (P0.05); The effective degradation rate of CP was tomato paste residue, alfalfa meal, corn silage, alfalfa hay cottonseed husk grape seed meal, and there was significant difference among the raw materials (P0.05). The effective degradation rate of NDF was the grape seed meal of alfalfa with cotton seed shell and alfalfa hay with tomato sauce, and there was significant difference among the feed materials among the groups (P0.05). The effective degradation rate of ADF was the grape seed meal of alfalfa powder with corn silage and cotton seed husk, and the content of Idg and IDCP in alfalfa meal RUP was the highest. Idg was significantly higher than that of alfalfa hay, corn silage, tomato sauce dregs, grape seed meal and cottonseed shell (P0.05), IDCP content was not significantly different from alfalfa hay content (P0.05), significantly higher than that of corn silage and tomato paste residue. Grape seed meal and cottonseed shell (P0.05). In conclusion, different feed materials have different rumen degradation characteristics and different IDCP content into the small intestine. The effective degradation rate of DM,NDF and ADF in rumen of maize silage was higher, Idg of RUP in alfalfa meal was higher, IDCP content of alfalfa meal and alfalfa hay was higher.
【作者单位】： 甘肃农业大学动物科学技术学院;中国农业科学院北京畜牧兽医研究所动物营养学国家重点实验室;北京市畜牧总站;
【基金】：国家科技支撑计划课题(2012BAD43B01) 国家自然科学基金(31560646)
【分类号】：S823.5
本文编号：2387261
[Abstract]:The purpose of this study was to study the rumen degradation characteristics of corn silage, cottonseed husk, alfalfa meal, alfalfa hay, grape seed meal and tomato sauce residue as well as the digestibility of rumen non-degradable protein (RUP) in small intestine. Three lactating Holstein cows with permanent rumen fistula were used to determine dry matter (DM), crude protein (CP), by nylon bag method and improved three-step method in vitro. The rumen degradation characteristics of neutral detergent fiber (NDF) and acid detergent fiber (ADF) and the contents of Idg of RUP and digestible crude protein (IDCP) of small intestine were studied. The results showed that: 1) the DM degradation rate of alfalfa meal and corn silage was the highest, significantly higher than that of alfalfa hay, tomato sauce residue (P0.05), grape seed meal and cottonseed shell (P0.05), significantly lower than other raw materials (P0.05); The effective degradation rate of CP was tomato paste residue, alfalfa meal, corn silage, alfalfa hay cottonseed husk grape seed meal, and there was significant difference among the raw materials (P0.05). The effective degradation rate of NDF was the grape seed meal of alfalfa with cotton seed shell and alfalfa hay with tomato sauce, and there was significant difference among the feed materials among the groups (P0.05). The effective degradation rate of ADF was the grape seed meal of alfalfa powder with corn silage and cotton seed husk, and the content of Idg and IDCP in alfalfa meal RUP was the highest. Idg was significantly higher than that of alfalfa hay, corn silage, tomato sauce dregs, grape seed meal and cottonseed shell (P0.05), IDCP content was not significantly different from alfalfa hay content (P0.05), significantly higher than that of corn silage and tomato paste residue. Grape seed meal and cottonseed shell (P0.05). In conclusion, different feed materials have different rumen degradation characteristics and different IDCP content into the small intestine. The effective degradation rate of DM,NDF and ADF in rumen of maize silage was higher, Idg of RUP in alfalfa meal was higher, IDCP content of alfalfa meal and alfalfa hay was higher.
【作者单位】： 甘肃农业大学动物科学技术学院;中国农业科学院北京畜牧兽医研究所动物营养学国家重点实验室;北京市畜牧总站;
【基金】：国家科技支撑计划课题(2012BAD43B01) 国家自然科学基金(31560646)
【分类号】：S823.5
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