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1.
为了研究科尔沁肉牛对不同粗饲料的降解特性,采用尼龙袋法测定苜蓿干草、玉米秸秆、羊草、稻草、玉米青贮和苜蓿草块6种粗饲料在肉牛瘤胃内干物质(dry matter,DM)、粗蛋白(crude protein,CP)、中性洗涤纤维(neutral detergent fiber,NDF)和酸性洗涤纤维(acid detergent fiber,ADF)的瘤胃降解率。结果显示:DM和CP的肉牛瘤胃有效降解率(ED)以苜蓿干草最高,稻草最低,苜蓿草块、玉米青贮、羊草和玉米秸秆居中;NDF和ADF的肉牛瘤胃ED以苜蓿干草最高,羊草最低。结果表明:从科尔沁肉牛对6种粗饲料的降解特性看,苜蓿干草的营养价值最高,稻草的营养价值最低。 相似文献
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旨在探讨非常规粗饲料(玉米芯、毛豆荚壳)与奶牛常用粗饲料(苜蓿干草、玉米青贮)在奶牛瘤胃中的降解规律,试验选用3只装有永久性瘤胃瘘管的荷斯坦奶牛,采用尼龙袋法测定4种粗饲料的干物质(DM)、粗蛋白(CP)、中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)的瘤胃降解规律。结果表明:1)苜蓿干草和毛豆荚壳的CP含量分别为17.55%和11.10%,且苜蓿干草显著高于毛豆荚壳(P<0.05);玉米芯和玉米青贮的CP含量分别为2.97%和8.41%,且玉米芯显著低于玉米青贮(P<0.05);玉米芯的NDF和ADF含量显著高于其他3种粗饲料(P<0.05),达到79.98%和43.35%。2)苜蓿干草的DM有效降解率最高(P<0.05),由高到低依次为苜蓿干草、毛豆荚壳、玉米青贮和玉米芯。毛豆荚壳的CP有效降解率显著高于其他3种粗饲料(P<0.05),由高到低依次为毛豆荚壳、苜蓿干草、玉米青贮和玉米芯。苜蓿干草的NDF有效降解率显著高于毛豆荚壳(P<0.05),玉米青贮和毛豆荚壳无显著差异(P>0.05);玉米芯的ADF有效降解率最高(P<0.05),苜蓿干草、玉米青贮和毛豆荚壳无显著差异(P>0.05)。综上所述,玉米芯和毛豆荚壳可作为非常规粗饲料资源加以开发利用。 相似文献
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为了评价8种常用粗饲料（稻草、甘蔗梢青贮、全株玉米青贮、甜脆玉米青贮、王草、象草、苜蓿干草、燕麦草）在奶水牛瘤胃中的降解特性,本试验用概略养分分析法测定8种粗饲料干物质（DM）、有机物（OM）、粗蛋白质（CP）含量,范式纤维分析法测定中性洗涤纤维（NDF）和酸性洗涤纤维（ADF）含量;并选取3头安装有永久瘤胃瘘管的杂交奶水牛作为试验动物,通过尼龙袋法测定8种粗饲料的DM、CP、NDF和ADF的瘤胃有效降解率和降解参数。结果表明：1）苜蓿干草的CP含量显著高于其他粗饲料（P<0.05）,NDF含量显著低于其他粗饲料（P <0.05）。甜脆玉米青贮的ADF含量最低,显著低于其他粗饲料（P<0.05）。稻草的CP含量显著低于其他粗饲料（P<0.05）,NDF含量显著高于其他粗饲料（甘蔗梢青贮除外）（P<0.05）。2)DM有效降解率顺序由高到低依次为甜脆玉米青贮>苜蓿干草>全株玉米青贮>燕麦草>象草>甘蔗梢青贮>王草>稻草,各粗饲料之间均差异显著（P<0.05）。苜蓿干草的CP有效降解率显著高于其余粗饲料（P<... 相似文献
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《中国畜牧杂志》2019,(1)
本试验旨在比较沙棘果渣与谷草秸、燕麦草和青贮玉米秸秆的营养价值及瘤胃降解特性的差异。选取3只安装永久性瘤胃瘘管的杜×寒杂交F1代成年肉用绵羊,采用尼龙袋法评定4种粗饲料的干物质(DM)、粗蛋白质(CP)、酸性洗涤纤维(ADF)和中性洗涤纤维(NDF)的瘤胃降解特性。结果表明:4种样品的DM含量差异不大,沙棘果渣的CP含量(16.70%)和粗脂肪(EE)含量(8.20%)均最高,青贮玉米秸秆和谷草秸含NDF、ADF较高;4种样品的DM、有机物(OM)、CP、NDF、ADF瘤胃降解率均随时间的延长而逐渐增大,最终趋于稳定;4种样品的DM瘤胃有效降解率由高到低依次为燕麦草>沙棘果渣>青贮玉米秸秆>谷草秸(P<0.05),OM有效降解率由高到低依次为沙棘果渣>燕麦草>青贮玉米秸秆>谷草秸(P<0.05),CP有效降解率由高到低依次为燕麦草>沙棘果渣>青贮玉米秸秆>谷草秸(P<0.05),NDF和ADF有效降解率由高到低依次为沙棘果渣>青贮玉米秸秆>谷草秸>燕麦草(P<0.05)。综上所述,4种粗饲料营养成分含量丰富且差异较大;从瘤胃降解特性来看,沙棘果渣饲用价值最高,可作为动物的饲料原料,综合利用开发前景广阔。 相似文献
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《动物营养学报》2016,(3)
本试验旨在研究2种刈割高度的禾王草干草和青贮、羊草干草、苜蓿干草以及全株玉米青贮共7种粗饲料的瘤胃降解特性。选用4头装有永久性瘤胃瘘管的荷斯坦奶牛为试验动物,采用尼龙袋法评定其干物质(DM)、粗蛋白质(CP)、中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)的72 h瘤胃降解率。结果表明:1)禾王草干草CP含量显著高于羊草干草(P0.05),NDF含量显著低于羊草干草(P0.05);禾王草青贮CP和NDF含量显著高于全株玉米青贮(P0.05)。2)苜蓿干草DM有效降解率最高,与依次降低的全株玉米青贮、2.0 m禾王草青贮、2.5 m禾王草青贮、2.0 m禾王草干草、2.5 m禾王草干草和羊草干草差异显著(P0.05),羊草干草的DM有效降解率显著低于其他粗饲料(P0.05);CP有效降解率以苜蓿干草最高,与2.0 m禾王草青贮差异不显著(P0.05),显著高于依次降低的2.5 m禾王草青贮、2.0 m禾王草干草、全株玉米青贮、2.5 m禾王草干草和羊草干草(P0.05);全株玉米青贮与禾王草青贮的NDF有效降解率差异不显著(P0.05),而显著高于其他粗饲料(P0.05);禾王草青贮72 h时ADF有效降解率显著高于其他粗饲料(P0.05)。由此可知,禾王草有作为奶牛粗饲料的潜力,禾王草经青贮后可以保存营养成分,并可以提高营养成分的瘤胃利用效率。 相似文献
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不同方法调制的苜蓿主要营养成分奶牛瘤胃有效降解率 总被引：3，自引：1，他引：2
本文旨在研究不同方法调制的苜蓿对奶牛的营养价值.试验采用3×3拉丁方设计,用3头装有永久性瘤胃瘘管的中国荷斯坦奶牛,对加酸苜蓿青贮、半干苜蓿青贮和苜蓿干草的主要营养成分进行瘤胃有效降解率研究.结果显示:1)加酸苜蓿青贮的DM、CP、NDF和ADF的有效降解率均最高,但DM有效降解率三者之间差异不显著(P>O.05);2)加酸苜蓿青贮和半干苜蓿青贮的CP有效降解率显著高于苜蓿干草(P<0.05),但两者之间差异不显著(P>O.05);3)加酸苜蓿青贮的NDF有效降解率显著高于半干苜蓿青贮和苜蓿干草(PO.05);4)加酸苜蓿青贮ADF的有效降解率显著高于苜蓿干草(P<0.05),加酸苜蓿青贮与半干苜蓿青贮之间、半干苜蓿青贮与苜蓿干草之间差异不显著(P>O.05). 相似文献
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试验旨在研究发酵湿玉米纤维饲料同常用粗饲料在瘤胃降解特性和小肠消化率的异同点。选用2头体重550 kg左右,安装有永久性瘤胃瘘管的荷斯坦奶牛作为试验动物,采用常规方法测定发酵湿玉米纤维饲料(FWCGF)、湿玉米纤维饲料(WCGF)、苜蓿和全株玉米青贮的营养价值,采用尼龙袋法和三步体外法测定4种饲料的干物质(DM)、粗蛋白(CP)、中性洗涤纤维(NDF)的瘤胃降解率以及瘤胃非降解蛋白(RUP)的小肠消化率。试验结果表明:(1)FWCGF的CP含量显著高于WCGF、苜蓿和全株玉米青贮(P0.05);苜蓿的SP、NPN、NDICP和ADF含量最高,FWCGF的ADF含量显著低于WCGF(P0.05);FWCGF的EE含量显著高于WCGF的EE含量(P0.05)。(2)4种饲料的DM瘤胃降解率和有效降解率由高到低的顺序是FWCGFWCGF苜蓿全株玉米青贮;4种饲料的CP有效降解率由高到低的顺序是FWCGFWCGF全株玉米青贮苜蓿;4种饲料的NDF有效降解率由高到低的顺序是全株玉米青贮苜蓿FWCGFWCGF。(3)WCGF和FWCGF的RUP小肠消化率和小肠可消化蛋白质差异不显著(P0.05),苜蓿最高。综上可以得出,FWCGF和WCGF均含有高含量的可利用蛋白质和可利用纤维,并且FWCGF可以提高可利用蛋白的含量,有较高的DM和CP的瘤胃降解率,通过酿酒酵母发酵处理可有效保持WCGF的营养成分。 相似文献
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文章旨在研究豆粕、牡丹籽粕、棉籽粕、棕榈粕、啤酒糟、豆渣、味精渣、玉米酒精糟（DDGS）、芝麻饼粕和葵花饼共10种蛋白质饲料原料的瘤胃降解特性。试验选用3头装有永久性瘤胃瘘管的鲁西牛×利木赞杂交牛为试验动物,采用尼龙袋法测定10种蛋白质饲料的干物质（DM）、粗蛋白质（CP）、中性洗涤纤维（NDF）和酸性洗涤纤维（ADF）瘤胃降解率。结果表明：味精渣DM有效降解率最高,芝麻饼粕最低,各原料间差异显著（P <0.05）;CP有效降解率为棉籽粕>牡丹籽粕>豆粕>味精渣>豆渣> DDGS>葵花粕>啤酒糟>棕榈粕>芝麻饼粕,各原料间显著差异（P <0.05）;味精渣、棉籽粕和豆粕的NDF有效降解率较高,棕榈粕、啤酒糟和芝麻饼粕较低,各原料间差异显著（P <0.05）;味精渣ADF有效降解率最高,其次为豆粕、棉籽粕和牡丹籽粕,均显著高于其他原料（P <0.05）。综上所述,不同来源蛋白质饲料具有不同的瘤胃降解特性,采用隶属函数进行综合营养评价,排序为味精渣>豆粕>棉籽粕> DDGS>牡丹籽粕>... 相似文献
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本试验旨在研究苜蓿青贮、全株小麦青贮、全株玉米青贮、苜蓿干草、燕麦草(2种)、稻草、花生秧、谷子秸秆和小麦秸秆共10种粗饲料在奶牛瘤胃中的降解特性,为科学配制奶牛饲粮提供数据参考。采用尼龙袋法评定其干物质(DM)、粗蛋白质(CP)、中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)的72 h动态降解率和有效降解率。结果表明,苜蓿青贮的DM有效降解率最高,达到58.24%,小麦秸秆的最低,为34.20%;CP有效降解率最高的是苜蓿干草,与依次降低的全株小麦青贮、苜蓿青贮、全株玉米青贮、燕麦草、稻草、小麦秸秆、谷子秸秆和花生秧差异显著(P0.05);全株小麦青贮的NDF有效降解率与全株玉米青贮、苜蓿干草、燕麦草差异不显著(P0.05),但显著高于其他粗饲料(P0.05);全株小麦青贮的ADF有效降解率显著高于其他粗饲料(P0.05)。综上所述,苜蓿干草和苜蓿青贮的瘤胃降解率较高,营养价值较高,小麦秸秆和谷子秸秆品质相对较差,花生秧与上述秸秆饲料比具有一定的优势。 相似文献
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不同方法测定瘤胃非降解蛋白质小肠消化率及相关性分析 总被引：2，自引：0，他引：2
本试验分别采用移动尼龙袋法、改进三步体外法、原始三步体外法和酸性洗涤不溶氮(ADIN)估测法测定13种精料的瘤胃非降解蛋白质(RUP)小肠消化率,并对移动尼龙袋法与其他方法的测定结果进行相关性分析,同时对常规营养成分和RUP小肠消化率作回归分析,旨在寻找替代移动尼龙袋法测定RUP小肠消化率更简单快速的方法.试验采用单因素试验设计,选取3头装有永久瘤胃瘘管和十二指肠T型瘘管的奶牛.结果表明:移动尼龙袋法测得的豆粕、棉籽粕、菜籽粕、葵花粕、芝麻粕、玉米胚芽粕、玉米、米糠、米糠粕、米糠饼、大麦、麦麸和玉米麸质饲料的RUP小肠消化率分别为98.13％、87.37％、88.47％、82.60％、85.73％、75.40％、93.23％、69.27％、77.83％、92.10％、91.27％、72.37％和79.03％.改进三步体外法测定结果与移动尼龙袋法测定结果的相关系数为0.8383;原始三步体外法测定结果与移动尼龙袋法测定结果的相关系数为0.7899;ADIN估测法预测结果与移动尼龙袋法测定结果无显著相关(P＞0.05);饲料RUP小肠消化率与饲料常规营养成分含量显著相关(P＜0.05).改进三步体外法比原始三步体外法替代移动尼龙袋法测定饲料RUP小肠消化率效果更好.应用体外法替代移动尼龙袋法测定蛋白质饲料RUP小肠消化率比测定能量饲料RUP小肠消化率效果更好.用饲料的常规营养成分含量可较好地预测RUP小肠消化率. 相似文献
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Three ruminal-cannulated Holstein cows in early lactation were fed three diets, each containing different energy and protein supplements in two consecutive 3 X 3 Latin squares. Each supplement contained a combination of three different feedstuffs (ground corn, soybean meal and wheat mids; corn gluten feed, rolled oats and distiller's dried grains; ground barley, brewer's grains and cottonseed meal). Diets consisted of 30% corn silage, 10% alfalfa hay, 10% alfalfa haylage, 17.7% ground corn plus minerals and vitamins, with the remainder as supplemental feedstuffs individually marked for measurement of ruminal turnover and in situ digestion rates. An extra period at the end of each Latin square was used to measure ruminal turnover and in situ digestion of individual forages. Diet had no effect on dry matter intake or milk yield. Mean fractional turnover (per hour) rate, measured by labeling feedstuffs with cerium, samarium or lanthanum was .044, .048, .049, .043, .047, .046, .050, .047, .049, .037, .046 and .045 for corn, soybean meal, wheat mids, corn gluten feed, oats, distiller's dried grains with solubles, barley, brewer's dried grains, cottonseed meal, alfalfa hay, corn silage and alfalfa haylage (P greater than .1), respectively. In situ-predicted ruminal degradation of N weighted for rate of passage was 61.4, 67.0, 81.5, 74.8, 86.3, 71.0, 75.7, 52.1, 54.2, 60.8, 71.7 and 70.9% for respective feedstuffs (P less than .05). In comparison with mean literature values for in vivo-measured N degradability, mean literature value = 1.172 (in situ predicted) -9.73 (P less than .05, R2 = .51). Results are interpreted to indicate a tendency for overestimating ruminal N degradability by in situ methods in feedstuffs of low degradability, while underestimating degradability in more highly degraded feedstuffs. Estimates were 11 to 17 percentage units lower than literature values for alfalfa hay and haylage and 17 units lower than literature values for distiller's dried grains. 相似文献
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[方法]选用装有瘤胃瘘管和小肠瘘管的肉牛作为试验动物,尼龙袋法测定肉牛常见饲料干物质(DM)和粗蛋白(CP)的瘤胃降解特性和小肠消化率。[结果]结果表明,DM瘤胃有效降解率由高到低为玉米粉、麦麸、苜蓿干草、豆粕、菜籽粕、玉米青贮、醋糟、白酒糟;CP瘤胃有效降解率由高到低为苜蓿干草、麦麸、豆粕、醋糟、玉米粉、玉米青贮、菜籽粕、白酒糟;DM小肠消化率由高到低为豆粕、菜籽粕、玉米粉、白酒糟、醋糟、麦麸、苜蓿干草、玉米青贮;CP小肠消化率由高到低为豆粕、菜籽粕、玉米粉、苜蓿干草、麦麸、白酒糟、玉米青贮、醋糟。[结论]试验表明,不同饲料瘤胃降解特性不同,为小肠提供过瘤胃可消化蛋白的能力不同,且饲料的DM小肠消化率小于CP小肠消化率。 相似文献
15.
Amino acid profiles of rumen undegradable protein: a comparison between forages including cereal straws and alfalfa and their respective total mixed rations 
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下载免费PDF全文 B. Wang L. S. Jiang J. X. Liu 《Journal of animal physiology and animal nutrition》2018,102(3):601-610
Optimizing the amino acid (AA) profile of rumen undegradable protein (RUP) can positively affect the amount of milk protein. This study was conducted to improve knowledge regarding the AA profile of rumen undegradable protein from corn stover, rice straw and alfalfa hay as well as the total mixed ratio diets (TMR) based on one of them as forage source [forage‐to‐concentrate ratio of 45:55 (30% of corn stover (CS), 30% of rice straw (RS), 23% of alfalfa hay (AH) and dry matter basis)]. The other ingredients in the three TMR diets were similar. The RUP of all the forages and diets was estimated by incubation for 16 hr in the rumen of three ruminally cannulated lactating cows. All residues were corrected for microbial colonization, which was necessary in determining the AA composition of RUP from feed samples using in situ method. Compared with their original AA composition, the AA pattern of forages and forage‐based diets changed drastically after rumen exposure. In addition, the extent of ruminal degradation of analysed AA was not constant among the forages. The greatest individual AA degradability of alfalfa hay and corn stover was Pro, but was His of rice straw. A remarkable difference was observed between microbial attachment corrected and uncorrected AA profiles of RUP, except for alfalfa hay and His in the three forages and TMR diets. The ruminal AA degradability of cereal straws was altered compared with alfalfa hay but not for the TMR diets. In summary, the AA composition of forages and TMR‐based diets changed significantly after ruminal exposure, indicating that the original AA profiles of the feed cannot represent its AA composition of RUP. The AA profile of RUP and ruminal AA degradability for corn stover and rice straw contributed to missing information in the field. 相似文献
16.
本试验以干玉米纤维饲料(DCGF)和湿玉米纤维饲料(WCGF)为原料,分析加工工艺对玉米纤维饲料营养价值的影响。选取3头装有永久性瘤胃瘘管的干奶期荷斯坦奶牛为试验动物,采用常规方法测定DCGF和WCGF营养成分含量,采用尼龙袋法测定瘤胃降解特性,采用三步体外法测定瘤胃非降解蛋白质(RUP)的小肠消化率,采用NRC模型预测代谢蛋白质和必需氨基酸供给量。结果表明:1)DCGF常规营养成分中除中性洗涤纤维(NDF)、中性洗涤不溶粗蛋白质(NDICP)、酸性洗涤不溶粗蛋白质(ADICP)含量显著高于WCGF(P0.05)外,其他营养成分含量均差异不显著(P0.05);2)DCGF和WCGF的瘤胃NDF降解率差异不显著(P0.05),而DCGF的瘤胃干物质(4、24、48 h)、粗蛋白质(CP)降解率(12、24、48和72 h)及有效降解率显著低于WCGF(P0.05);3)DCGF的RUP含量显著高于WCGF(P0.05),而总可消化养分和微生物蛋白质、代谢蛋白质含量与DCGF差异不显著(P0.05);4)DCGF的RUP的小肠消化率显著低于WCGF(P0.05),但总可消化蛋白质含量差异不显著(P0.05);5)饲料RUP提供的必需氨基酸中,DCGF的RUP提供的组氨酸(His)、苯丙氨酸(Phe)、异亮氨酸(Ile)以及总必需氨基酸含量显著高于WCGF(P0.05)。综合得出,DCGF和WCGF都含有高含量的可利用纤维和蛋白质,可以作为奶牛良好的纤维和蛋白质源饲料,但DCGF的瘤胃CP降解率和RUP的小肠消化率较低,可能影响其蛋白质和氨基酸的营养价值。 相似文献
17.
反刍家畜常用饲料蛋白质和氨基酸瘤胃降解特性和小肠消化率评定研究 总被引：11，自引：0，他引：11
本试验探讨了常用饲料在瘤胃的降解特性及非降解饲料的小肠消化率,旨在为研究反刍动物的营养平衡和消化规律及科学配制日粮提供依据。试验选用3头装瘤胃瘘管和十二指肠瘘管的肉牛,采用尼龙袋法研究反刍动物常用饲料粗蛋白质和氨基酸瘤胃降解参数和表观小肠消化率。结果表明,在本试验中粗蛋白质降解率由低到高的顺序为:酒糟蛋白、黄玉米、羊草、玉米胚芽饼、菜粕、棉粕、豆粕、花生饼、啤酒糟、苜蓿、米糠、小麦麸;总氨基酸瘤胃降解率由低至高的顺序依次为:酒糟蛋白、黄玉米、羊草、玉米胚芽饼、菜粕、豆粕、棉粕、啤酒糟、花生饼、苜蓿、米糠、小麦麸。除花生饼、酒糟蛋白和黄玉米外,粗蛋白质和总氨基酸的有效降解率差异不显著(P>0.05)。粗蛋白质的表观小肠消化率由低至高的顺序依次为:苜蓿、羊草、米糠、小麦麸、啤酒糟、玉米胚芽饼、棉粕、菜粕、玉米、酒糟蛋白、花生饼、豆粕;总氨基酸的小肠消化率由低至高的顺序依次为:羊草、苜蓿、米糠、小麦麸、啤酒糟、玉米胚芽饼、菜粕、棉粕、花生饼、玉米、酒糟蛋白、豆粕。由此可见,不同的饲料瘤胃降解特性是不同的,并且为小肠提供的各种可吸收氨基酸潜力也是不同的。 相似文献
18.
Defoor PJ Galyean ML Salyer GB Nunnery GA Parsons CH 《Journal of animal science》2002,80(6):1395-1404
Three experiments were conducted to evaluate the effects of roughage source and concentration on intake and performance by finishing heifers. In Exp. 1, 12 medium-framed beef heifers (average BW = 389 kg) were used in three simultaneous 4 x 4 Latin square intake trials to evaluate the effects of dietary NDF supply from alfalfa hay, sudan hay, wheat straw, or cottonseed hulls fed in each Latin square at 5, 10, or 15% of dietary DM. Within each roughage concentration, roughage NDF accounted for the majority of variation in NEg intake/kg of BW0.75 among the roughage sources. Averaged across roughage concentrations, NEg intake/kg of BW0.75 tended to be greater (P < 0.10) when heifers were fed cottonseed hulls, sudan hay, or wheat straw than when they were fed alfalfa. In Exp. 2, six medium-framed beef heifers (average BW = 273 kg) were used in a 3 x 3 Latin square design to determine whether diets containing 10% (DM basis) alfalfa, cottonseed hulls, or sudan silage differed in eating rate. Average DM eating rates did not differ (P > 0.10) among roughage sources, which we interpreted to suggest that 90% concentrate diets containing alfalfa, cottonseed hulls, and sudan silage do not differ in the amount of chewing required during eating. In Exp. 3, 105 medium-framed beef heifers (average BW = 275 kg) were used in a 140-d finishing trial to evaluate three methods of dietary roughage exchange. Alfalfa at 12.5% of the dietary DM (ALF12.5) was used as a standard, and cottonseed hulls and sudan silage were each fed at three different levels: exchanged with ALF12.5 on an equal percentage DM basis, an equal NDF basis, or an equal NDF basis, where only NDF from particles larger than 2.36 mm (retained NDF) were considered to contribute to the NDF. No differences (P > 0.10) in ADG, DMI, gain:feed ratio, or NEg intake/kg of BW0.75 were detected between alfalfa and cottonseed hulls exchanged on an equal NDF basis. For sudan silage, exchanging with ALF12.5 on an equal retained NDF basis resulted in no differences (P > 0.10) in ADG, DMI, or NEg intake/kg of BW0.75. These data provide a preliminary indication that depending on the roughage sources evaluated, roughage NDF content and(or) roughage NDF from particles larger than 2.36 mm might provide a useful index of roughage value in high-concentrate finishing diets. 相似文献
19.
瘤胃尼龙袋法测定常用饲料过瘤胃淀粉量及淀粉瘤胃降解率 总被引：14，自引：0，他引：14
以9头装有永久性瘤胃瘘管的内蒙古半细毛羯羊为试验动物,采用尼龙袋法对玉米淀粉、玉米、麸皮、豆粕、麻粕、棉籽粕、苜蓿干草、羊草、肋麦野豌豆、玉米秸等10种常用饲料的过瘤胃淀粉量及淀粉瘤胃降解率进行了比较研究。结果表明,各种饲料的过瘤胃淀粉量(g/kg)依次为417.85、404.84、226.31、62.04、110.56、108.61、73.50、50.87、47.55、24.43;其淀粉瘤胃降解率%依次为60.95、50.47、61.70、80.19、65.57、61.01、53.15、64.23、70.40、73.65。 相似文献