辣木在奶牛瘤胃中的降解特性研究

发布时间：2018-04-10 09:03

  本文选题：非常规饲料辣木　切入点：尼龙袋法　出处：《草业学报》2017年10期

【摘要】：为研究辣木的瘤胃降解特性,探索辣木在反刍动物饲料中的应用技术,以3头安装永久性瘘管的奶牛为试验动物,采用尼龙袋法测定辣木叶、辣木枝、辣木茎在瘤胃内的降解率和降解参数。结果表明:辣木干物质(DM)、有机物(OM)在瘤胃内的降解率和降解参数变化趋势相近,48h达到降解平台期,但不同部位的降解率差异较大。辣木叶干物质(DM)96h降解率最高,为69.34%,辣木枝和辣木茎依次降低;辣木各部位干物质(DM)和有机物(OM)的有效降解率差异显著(P0.05),叶、枝、茎的有效降解率依次降低。辣木叶粗蛋白(CP)的96h降解率高达90.86%,较辣木茎和枝分别高22.84%、38.92%;三者粗蛋白(CP)的有效降解率依次降低,但粗蛋白(CP)的有效降解率明显高于干物质(DM)和有机物(OM);辣木叶瘤胃降解蛋白(RDP)含量最高为15.57%,高于过瘤胃蛋白(RUP)含量,但辣木枝和茎的过瘤胃蛋白(RUP)含量高于瘤胃降解蛋白(RDP)含量。辣木叶、枝、茎中性洗涤纤维(NDF)的96h瘤胃降解率依次降低,分别为50.55%、27.11%、16.24%,辣木叶和辣木枝酸性洗涤纤维(ADF)的96h降解率大小相近;辣木叶的NDF、ADF的有效降解率均显著高于辣木枝和辣木茎(P0.05)。因此从瘤胃降解特性来看,辣木3个部位的营养价值依次为辣木叶辣木枝辣木茎。在饲喂奶牛过程中,建议单独饲喂辣木叶,辣木枝混合营养含量高的饲料饲喂,不建议将辣木茎直接作为奶牛饲料。
[Abstract]:In order to study the characteristics of rumen degradation and explore the application technology of Mori in the feed of ruminant, three dairy cows with permanent fistula were used as experimental animals to determine the leaf and branch of spicy wood by nylon bag method.The degradation rate and degradation parameters of the stem in rumen.The results showed that the degradation rate and degradation parameters of DMN and OMin in rumen reached the stage of degradation in 48 h, but the degradation rates of different parts varied greatly.The degradation rate of dry matter (DMN) was the highest (69.34) in 96 h, and the effective degradation rate of dried matter (DMM) and organic matter (OM) in different parts of Mori decreased in turn, such as P0.05, leaf, branch and stem.The degradation rate of crude protein (CPP) reached 90.86 in 96 h, which was 22.84 and 38.92 higher than that of stem and branch, respectively, and the effective degradation rate of CP3 decreased in turn.However, the effective degradation rate of CP was significantly higher than that of DM) and OMN, and the highest content of rumen degrading protein (RDPP) was 15.57%, which was higher than that of rumen protein (Rup).However, the content of rumen protein (Rup) in twigs and stems was higher than that in rumen degrading protein (RDP).The rumen degradation rate of leaf, branch and stem NDF decreased in turn at 96 h, which were 50.55 and 27.1116.24, respectively. The degradation rate of acid washing fiber ADF in leaves and branches was similar in 96 h.The effective degradation rate of NDFN ADF in leaves was significantly higher than that of P0.05 and P0.05 in the branches and stems of pungent wood.Therefore, the nutritive value of the three parts in the rumen degradation was the stem of the stem.In the course of feeding the cows, it is suggested that the dried wood leaves should be fed alone, and the spicy wood branches mixed with high nutrient content should be fed, but it is not recommended that the stem of spicy wood be directly used as the feed for dairy cows.
【作者单位】： 中国农业科学院饲料研究所农业部饲料生物技术重点实验室;山西农业大学动物科技学院;世纪爱心集团;
【基金】：中国农业科学院农业创新工程“奶牛绿色提质增效技术集成生产模式研究与示范项目”资助
【分类号】：S823.5
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本文编号：1730560