利用尼龙袋法评价象草、苜蓿和白酒糟在奶水牛瘤胃中的降解特性  

Rumen Degradation Characteristics of Elephant Grass,Alfalfa and Distiller’s Grains in Dairy Buffaloes by Nylon Bag Method

作　　者：彭丽娟 曾繁泉 罗鲜青 王克耀 李孟伟 杨承剑 PENG Lijuan;ZENG Fanquan;LUO Xianqing;WANG Keyao;LI Mengwei;YANG Chengjian(Key Laboratory of Buffalo Genetics,Breeding and Reproduction Technology,Ministry of Agriculture and Rural Affairs(Guangxi),Guangxi Buffalo Research Institute,Nanning 530001,China)

机构地区：[1]广西壮族自治区水牛研究所,农业农村部(广西)水牛遗传繁育重点实验室,南宁530001

出　　处：《动物营养学报》2024年第7期4716-4724,共9页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：广西科技重大专项(桂科AA22068099-8);广西自然科学基金项目(2023GXNSFAA026424);国家现代农业产业技术体系广西创新团队建设项目(nycytxgxcxtd-2021-21-03)。

摘　　要：本试验旨在研究象草、苜蓿和白酒糟各营养成分及其在水牛瘤胃中的降解特性。试验采用尼龙袋法测定3种粗饲料的干物质(DM)、粗蛋白质(CP)、中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)的瘤胃降解参数,并对其常规营养成分进行分析。结果表明:3种粗饲料中白酒糟的CP含量显著高于其他2种粗饲料(P<0.05),CP含量由高到低依次是白酒糟>苜蓿>象草。苜蓿和白酒糟的NDF含量显著低于象草(P<0.05)。苜蓿的ADF含量显著低于象草和白酒糟(P<0.05)。象草、苜蓿和白酒糟的DM有效降解率分别为47.24%、53.52%和47.95%,CP有效降解率分别为33.33%、66.04%和49.13%,DM和CP的有效降解率由高到低依次为苜蓿>白酒糟>象草。象草、苜蓿和白酒糟的NDF有效降解率分别为41.37%、33.24%和18.35%,由高到低依次为象草>苜蓿>白酒糟。象草、苜蓿和白酒糟的ADF有效降解率分别为33.55%、37.70%和24.11%,由高到低依次为苜蓿>象草>白酒糟。综上所述,苜蓿的饲用价值较高,可作为水牛的优质粗饲料来源,白酒糟的CP含量高,CP瘤胃有效降解率也较高,可作为水牛的CP补充,象草可通过搭配营养价值较高的其他饲料来满足水牛对纤维饲料的需求。This experiment was conducted to study the nutritional components and degradation characteristics of elephant grass,alfalfa and distiller’s grains in buffalo rumen.The rumen conventional nutritional components and degradation parameters of dry matter(DM),crude protein(CP),neutral detergent fiber(NDF)and acid detergent fiber(ADF)of the three roughages were determined by nylon bag method.The results showed that the CP content of distiller’s grains was significantly higher than that of the other two roughages(P<0.05).The CP contents of distiller’s grains>alfalfa>elephant grass was in the order from high to low.The NDF contents of alfalfa and distiller’s grains were significantly lower than those of elephant grass(P<0.05).The ADF content of alfalfa was significantly lower than that of elephant grass and distiller’s grains(P<0.05).The DM effective degradation rates of elephant grass,alfalfa and distiller’s grains were followed by 47.24%,53.52%and 47.95%,The effective degradation rates of CP were followed by 33.33%,66.04%,and 49.13%.The effective degradation rates of DM,CP and ADF of alfalfa were the highest.The effective degradation rates of DM and CP from high to low were alfalfa>distiller’s grains>elephant grass.The NDF effective degradation rates of elephant grass,alfalfa and distiller’s grains were followed by 41.37%,33.24%and 18.35%,from high to low,the order were elephant grass>alfalfa>distiller’s grains.The ADF effective degradation rates of elephant grass,alfalfa and distiller’s grains were followed by 33.55%,37.70%and 24.11%,from high to low,the order were alfalfa>elephant grass>distiller’s grains from high to low.In conclusion,alfalfa has high feeding value and can be used as a source of high-quality roughage for buffaloes.The distiller’s grains can be used as CP supplement for buffaloes because of its high CP content and rumen effective degradation rate.Elephant grass can meet the needs of buffaloes for fiber feed by matching with other high-quality roughage.

关 键 词：尼龙袋法 象草 苜蓿 白酒糟 水牛 瘤胃降解 

分 类 号：S823[农业科学—畜牧学]