摘要
试验旨在探索藜麦秸秆分别与苜蓿干草、玉米秸秆组合对羊瘤胃体外发酵特征的影响。设置精料+藜麦秸秆+苜蓿干草或玉米秸秆比例分别为40∶20∶40、40∶30∶30、40∶40∶20的6种组合日粮进行体外发酵,采集发酵0、2、4、6、8、12、24、48 h的产气量(GP),发酵结束后收集上清液及残渣测定pH、干物质降解率(DMD)、有机物降解率(OMD)、氨态氮(NH3-N)含量,并计算出各指标的单项组合效应指数(SFAEI)和多效组合效应指数(MFAEI)。结果显示:精料+藜麦秸秆+苜蓿干草组合的快速产气部分(a)、48 h产气量(GP48 h)、OMD、NH3-N的平均值大于精料+藜麦秸秆+玉米秸秆组合,精料+藜麦秸秆+苜蓿干草组合单项组合相应指数和多效组合效应指数的平均值大于精料+藜麦秸秆+玉米秸秆组合,精料+藜麦秸秆+苜蓿干草或玉米秸秆的最优组合比例均为40∶20∶40。
This experiment was conducted to assess the effects of quinoa straw combined with alfalfa hay and corn straw on the in vitro fermentation characteristics of sheep rumen.Six diets with a ratio of con⁃centrate,quinoa straw,alfalfa hay,or corn straw at 40∶20∶40,40∶30∶30,and 40∶40∶20 were set for in vitro fermentation.The gas production(GP)of fermentation was collected at 0,2,4,6,8,12,24,and 48 hours.After fermentation,the supernatant and residues were collected for pH,dry matter degrada⁃tion rate(DMD),organic matter degradation rate(OMD),and ammonia nitrogen(NH3-N)content measure⁃ment,and which were used for calculating the single combined effect index(SFAEI)and multicombined effect index(MFAEI).The results showed that the rapid gas production part(a),48 hour gas production(GP48 h),OMD,and NH3-N of the combination of concentrate+quinoa straw+alfalfa hay were higher than those of the combination of concentrate+quinoa straw+corn straw.The corresponding index and comprehen⁃sive combination effect index of the combination of concentrate+quinoa straw+alfalfa hay were higher than those of the combination of concen⁃trate+quinoa straw+corn straw.The optimal combination ratio of concentrate+quinoa straw+alfalfa hay was 40∶20∶40,and the optimal combination ratio of concentrate+quinoa straw+corn straw was 40∶20∶40.
作者
郝生燕
杨发荣
刘文瑜
潘发明
杨荣芳
宋淑珍
唐德富
王国栋
HAO Shengyan;YANG Farong;LIU Wenyu;PAN Faming;YANG Rongfang;SONG Shuzhen;TANG Defu;WANG Guodong(Animal Husbandry,Pasture and Green Agriculture,Gansu Academy of Agricultural Sciences,Gansu Lanzhou 730070,China;Liaoning Agricultural Vocational and Technical College,Liaoning Yingkou 115009,China;College of Animal Science and Technology,Gansu Agricultural University,Gansu Lanzhou 730070,China)
出处
《饲料工业》
CAS
北大核心
2024年第17期108-112,共5页
Feed Industry
基金
甘肃省农业农村厅农业科技支撑项目[KJZC2023-14]
兰州市青年科技人才创新项目[2023-QN-148]
甘肃省自然科学基金项目[23JRRA1336]
甘肃省科技计划项目[23ZDWA004]
甘肃省林业和草原科技创新项目[GYCX9〔2020〕03-2]
嘉峪关市科技计划项目[23--24]
兰州市科技计划项目[2022-2-50]。
关键词
藜麦秸秆
苜蓿干草
玉米秸秆
体外产气法
发酵特性
组合效应
quinoa straw
alfalfa hay
corn straw
in vitro gas production
fermentation characteristics
associative effects
