食叶草的营养价值及其在肉羊瘤胃中降解特性研究  

Study on Nutritional Value and Ruminal Degradation Characteristics of Protein Grasses in Mutton Sheep

作　　者：杨春旭 陈渤 周威 陈东[4] 李琴 张乃锋[2] 屠焰[2] 毕研亮[2] 成述儒[1] 刁其玉[2] YANG Chunxu;CHEN Bo;ZHOU Wei;CHEN Dong;LI Qin;ZHANG Naifeng;TU Yan;BI Yanliang;CHENG Shuru;DIAO Qiyu(College of Animal Science and Technology,Gansu Agricultural University,Lanzhou 730070,China;Key Laboratory of Feed Biotechnology of the Ministry of Agriculture and Rural Affairs,Institute of Feed Research,Chinese Academy of Agricultural Sciences,Beijing 100081,China;Beijing Maosheng Protein Grass Science and Technology Industry Development Co.,Ltd.,Beijing 101318,China;College of Animal Science and Technology,Hunan Agricultural University,Changsha 410128,China)

机构地区：[1]甘肃农业大学动物科学技术学院,兰州730070 [2]中国农业科学院饲料研究所,农业农村部饲料生物技术重点实验室,北京100081 [3]北京茂盛食叶草科技产业发展有限公司,北京101318 [4]湖南农业大学动物科学技术学院,长沙410128

出　　处：《动物营养学报》2024年第6期3789-3796,共8页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：湖南省重点研发计划项目(2023NK2023)。

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。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 addition,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)using 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.

关 键 词：食叶草 营养价值 肉羊 尼龙袋法 瘤胃降解率 

分 类 号：S816[农业科学—饲料科学]