3种饲草不同配比的体外消化特性及组合效应分析

发布时间：2019-06-27 14:36

【摘要】：本研究旨在实现低质粗饲料的有效利用,为我国北方地区饲草型发酵全混合日粮确定最佳粗饲料组合配方。将玉米秸、苜蓿、燕麦草3种饲草通过机械预处理,按不同比例混合后进行体外发酵,根据混合饲草的体外发酵指标(pH、IVDOM、GP、TVFA等)以及组合效应进行综合评定。结果表明,玉米秸+燕麦草组合体外发酵各指标及组合效应效果不佳;玉米秸+苜蓿干草组合中,处理组D(玉米秸∶苜蓿干草=60%∶40%)和处理组E(玉米秸∶苜蓿干草=50%∶50%)体外发酵指标(pH、IVDOM、GP、TVFA)值及正组合效应高于或显著高于其他组合(P0.05);玉米秸+苜蓿干草+燕麦草组合中,处理组R(玉米秸秆∶苜蓿干草∶燕麦干草=50%∶30%∶20%)和处理组Q(玉米秸秆∶苜蓿干草∶燕麦干草=50%∶40%∶10%)体外发酵指标值及正组合效应高于或显著高于其他组合(P0.05)。综合考虑,玉米秸+苜蓿干草和玉米秸+苜蓿干草+燕麦草两个组合中,苜蓿的添加比例在30%以上时,体外发酵积累的pH、IVDOM、GP、TVFA值及组合效应显著增加,能明显地提高秸秆的消化率或降解率,饲草间产生正组合效应更显著。
[Abstract]:The purpose of this study is to realize the effective utilization of the low-quality coarse feed, and to determine the optimal crude feed composition formula for the whole mixed ration of the forage grass-type fermentation in the northern area of China. The three kinds of forage grass, such as cornstalk, carrot and wheatgrass, were pre-treated by mechanical pretreatment, and then the in-vitro fermentation was carried out according to different proportions, and the comprehensive evaluation was carried out according to the in vitro fermentation index (pH, IVDOM, GP, TVFA, etc.) and the combined effect of the mixed feeding grass. The results showed that the combination effect of corn straw and oat straw combined in vitro was not good, and in the combination of corn straw and wheat straw, the treatment group D (corn straw, hay, hay = 60%:40%) and treatment group E (corn straw: hay) hay = 50%: 50%) in vitro fermentation index (pH, IVDOM, GP, TVFA) value and positive combined effect were higher or significantly higher than that of other combinations (P0.05); in the combination of corn straw and hay + oat straw, the treatment group R (corn straw: hay) hay: oat hay = 50%:30%: 20%) and the treatment group Q (corn straw: oat hay = 50%:40%:10%) in vitro fermentation index value and positive combined effect were higher or significantly higher than that of other combinations (P0.05). in that comprehensive consideration, in the two combination of the corn straw, the corn straw, the corn straw and the corn straw, the hay and the oat straw, the pH value, the IVDOM, the GP, the TVFA value and the combined effect accumulated in the in-vitro fermentation are obviously increased, and the digestibility or the degradation rate of the straw can be obviously improved, The positive combined effect between the forage grass is more significant.
【作者单位】：内蒙古农业大学草原与资源环境学院草地资源教育部重点实验室;内蒙古自治区草原勘察规划院;中国农业科学院草原研究所;内蒙古自治区农牧业科学院;
【基金】：内蒙古科技计划项目(20151113) 国家现代牧草产业技术体系项目(CARS-35) 内蒙古农牧科学院青年基金(2014QNJJM07) “十三五”国家重点研发计划课题(2016YFC0500605) “十二五”国家科技支撑计划课题(2012BAD13B07)
【分类号】：S816

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