苜蓿青贮替代苜蓿干草对瘤胃体外发酵参数的影响  

Effect of alfalfa silage replacing alfalfa hay on rumen fermentation parameters in vitro

作　　者：黄品 雷景然 纪守坤 夏文欣 栗金丽 高立杰[1] HUANG Pin;LEI Jing-ran;JI Shou-kun;XIA Wen-xin;LI Jin-li;GAO Li-jie

机构地区：[1]河北农业大学动物科技学院,河北保定071000

出　　处：《饲料研究》2022年第18期1-4,共4页Feed Research

基　　金：河北省科学技术厅项目“优质饲草多元化产品加工利用关键技术集成研究与应用(项目编号:V1624524443574)”。

摘　　要：试验旨在探究苜蓿青贮替代苜蓿干草对瘤胃体外发酵参数的影响。采用单因子重复设计,将全株玉米青贮(WCS)、小麦秸秆(WS)、苜蓿干草(AH)、苜蓿青贮(AS)比例分别设置为60∶20∶20∶0(A组)、60∶20∶16∶4(B组)、60∶20∶12∶8(C组)、60∶20∶10∶10(D组)、60∶20∶8∶12(E组)、60∶20∶4∶16(F组)、60∶20∶0∶20(G组),每组3个重复,测定不同饲料组合的体外产气量(GP)、人工瘤胃培养液pH值、干物质降解率(IVDMD)、氨态氮(NH_(3)-N)、微生物蛋白(MCP)和挥发性脂肪酸(VFA)含量。结果显示:随着AS替代AH比例升高,各组瘤胃培养液的GP、IVDMD、NH_(3)-N、MCP、VFA呈先升后降的趋势,D组瘤胃培养液的GP、IVDMD、NH_(3)-N、MCP、VFA含量均高于其他组。研究表明,AS替代AH可以改善瘤胃培养液的发酵参数,AH∶AS的适宜比例为10∶10。The experiment was to investigate the effect of alfalfa silage replacing alfalfa hay on rumen fermentation parameters in vitro.Using a single factor repeated design,the proportions of whole corn silage(WCS),wheat straw(WS),alfalfa hay(AH)and alfalfa silage(AS)were 60∶20∶20∶0(group A),60∶20∶16∶4(group B),60∶20∶12∶8(group C),60∶20∶10∶10(group D)and 60∶20∶8∶12(group E),60∶20∶4∶16(group F)and 60∶20∶0∶20(group G),respectively,with three replicates in each group.The in vitro gas production(GP),pH value of artificial rumen culture medium,dry matter degradation rate(IVDMD),ammonia nitrogen(NH_(3)-N),microbial protein(MCP)and volatile fatty acid(VFA)content of different diet combinations were determined.The results showed that GP,IVDMD,NH_(3)-N,MCP and VFA in each group was increased first and then decreased with the increase of the proportion of AH replaced by AS.The content of GP,IVDMD,NH_(3)-N,MCP and VFA in group D were higher than those in other groups.The experiment indicates that the replacement of AH by AS can improve the fermentation parameters of rumen culture fluid,and the appropriate ratio of AH∶AS is 10︰10.

关 键 词：苜蓿青贮 苜蓿干草 产气参数 体外发酵参数 

分 类 号：S816.6[农业科学—饲料科学]