摘要
本试验旨在研究食叶草的营养价值及其在肉羊瘤胃中的降解特性,为食叶草在反刍动物饲粮中的应用提供依据.在采用化学分析法测定食叶草常规营养成分含量的基础上,采用尼龙袋法,以装有瘤胃瘘管的3头成年肉羊为试验动物,测定食叶草中4种常规营养成分在2、4、6、12、24、36、48 h时的瘤胃降解率和降解参数.结果表明:新鲜食叶草中初水分含量为91.12％,食叶草干物质(DM)中有机物(OM)含量达到96.99％,粗蛋白质(CP)、粗脂肪(EE)含量分别为31.43％和2.45％,中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)含量分别为31.75％和25.45％,钙(Ca)、磷(P)含量分别为0.51％和0.40％.食叶草DM、CP、NDF、ADF 48 h的瘤胃降解率分别为 81.05％、82.88％、60.70％、58.57％,有效降解率分别为 56.13％、58.93％、36.36％、34.94％.综上可知,食叶草的CP含量较高,NDF和ADF含量较低,主要营养成分在肉羊瘤胃中有较高的降解率,可作为优质饲草来源在反刍动物养殖中推广.
Abstract
This study aimed to investigate the nutritional value and ruminal degradation characteristics of protein grass in sheep,in order to provide a theoretical basis for its application in ruminant diets.Chemical analysis methods were conducted to determine the conventional nutritional component contents of protein grass.In addi-tion,the rumen degradation rate and degradation parameters at 2,4,6,12,24,36 and 48 h of 4 conventional nutritional components in protein grass were measured with 3 rumen-cannulated adult mutton sheep(n=3)u-sing nylon bag method.The results showed that the fresh protein grass contains primary moisture of 91.12％,and the contents of organic matter(OM),crude protein(CP),ether extract(EE),neutral detergent fiber(NDF),acid detergent fiber(ADF),calcium(Ca)and phosphorus(P)in dry matter(DM)of this plant were 96.99％,31.43％,2.45％,31.75％,25.45％,0.51％and 0.40％,respectively.Moreover,the rumen degradation rates at 48 h of DM,CP,NDF and ADF of protein grass were 81.05％,82.88％,60.70％and 58.57％,and the effective degradation rates were 60.44％,62.91％,40.53％and 39.26％,respectively.In summary,protein grass contains higher CP and lower NDF and ADF,and its main nutritional components have a higher degradation rate in the rumen of mutton sheep.Thus,the protein grass can be used as a high-quality roughage resource in ruminant production.[Chinese Journal of Animal Nutrition,2024,36(6):3789-3796]
维普
万方数据