发酵稻草与花生秸秆组合对湖羊瘤胃体外发酵的影响  

Effect of combination of fermented rice straw and peanut straw on in vitro fermentation of rumen in Hu sheep

作　　者：吴婷 俞乾挺 WU Ting;YU Qian-ting

机构地区：[1]嘉兴市农业科学研究院桐乡农业科学研究所,浙江嘉兴314500

出　　处：《饲料研究》2024年第16期13-17,共5页Feed Research

摘　　要：试验旨在通过体外产气法评价发酵稻草与花生秸秆不同比例混合对湖羊瘤胃体外发酵的影响。试验将发酵稻草与花生秸秆分别以100∶0(T0组)、80∶20(T20组)、60∶40(T40组)、40∶60(T60组)、20∶80(T80组)、0∶100(T100组)组合进行发酵试验。选取5只健康状况良好,体重相近的湖羊为瘤胃液供体,测定混合后常规营养物质、体外产气参数、体外发酵参数、72 h常规营养物质降解率、单项组合效应和多项组合效应。结果表明:T80组72 h产气量最高,显著高于除T100组的其余各组(P<0.05)。随着花生秸秆比例的增加,各组培养液氨态氮(NH_(3)-N)、总挥发性脂肪酸、丙酸、戊酸和异戊酸、异丁酸浓度均呈先上升后下降趋势。T80组的多项组合效应(MFAEI)优于其他组合。研究表明,不同比例发酵稻草和花生秸秆组合均可产生正向组合效应,其中发酵稻草∶花生秸秆比例为20∶80时组合效应较好,可以提高湖羊对粗饲料的利用率。The experiment aimed to evaluate the impact of different ratios of fermented rice straw and peanut straw on the invitrorumen fermentation of Hu sheep by the gas production method.The straw and peanut straw were combined in the following proportions for the fermentation test:100∶0(Group T0),80∶20(Group T20),60∶40(Group T40),40∶60(Group T60),20∶80(Group T80),and 0∶100(Group T100).Five Hu sheep in good health with similar body weights were selected as rumen fluid donors.The experiment determined the in vitro fermentation parameters,including the degradation rate of conventional nutrients,gas production parameters,in vitro fermentation parameters,72-hour degradation rate of conventional nutrients,single combination effect,and multiple combination effect.The results showed that Group T80 had the highest gas production at 72 hours,which was significantly higher than all other groups except for Group T100(P<0.05).As the proportion of peanut straw increased,the concentration of NH_(3)-N,total volatile fatty acids,propionic acid,valeric acid,isovaleric acid,and isobutyric acid in the culture fluid of all groups showed an increasing and then decreasing trend.The multiple combination effect(MFAEI)of Group T80 was superior to other combinations.The study indicates that different ratios of fermented straw and peanut straw combinations can produce positive synergistic effects.Among them,the combination of fermented straw to peanut straw at a ratio of 20∶80 exhibits a better synergistic effect,which can improve the utilization rate of roughage by the Hu sheep.

关 键 词：湖羊 组合效应 发酵稻草 花生秸秆 体外发酵 

分 类 号：S826[农业科学—畜牧学]