【摘要】 试验将云贵高原地区木豆、新银合欢、木薯、火棘和苦刺进行单独青贮处理,并对青贮饲料的色泽、气味、质地等感官品质,p H值、有机酸含量及组成、氨态氮/总氮比值等发酵品质,以及青贮前后饲料营养成分的变化情况进行了分析评定。结果表明:(1)5种灌木经过青贮处理后都能维持较低的p H值,木豆和木薯的p H值显著低于其他3种灌木(P<0.05)。木薯的乳酸含量显著高于其他4种灌木(P<0.05)。木豆的乙酸含量显著高于其他4种灌木(P<0.05),木薯和火棘之间差异不显著(P>0.05)。火棘的丙酸含量显著高于其他4种灌木(P<0.05)。木薯和火棘的丁酸含量最高,苦刺最低(P<0.05)。新银合欢的NH3-N/TN显著高于其他4种灌木(P>0.05)。(2)5种灌木经过青贮处理后,中性洗涤纤维、酸性洗涤纤维和酸性洗涤木质素含量显著降低(P<0.05);粗脂肪含量显著提高(P<0.05);有机物和粗蛋白质含量略有上升,但差异不显著(P>0.05)。综合感官评定、发酵品质指标和青贮饲料营养成分确定的5种灌木饲料青贮品质的优劣次序为苦刺>木薯>新银合欢>火棘>木豆。更多还原

【Abstract】 This experiment was conducted to study the silage quality and nutrition ingredient of Pigeonpea,New leucaena,Cassava,Pyracantha and Solanum deflexicarpum.In this experiment,the Pigeonpea,New leucaena,Cassava,Pyracantha and Solanum deflexicarpum were ensiled respectively,the silage sensory qualities,p H value,organic acid content and composition,ammoniacal nitrogen/total nitrogen ratio,and the change of nutrients before and after ensiling were analyzed.The results showed as follows:(1)5 kinds of shrubs after ensiling maintain at a low p H value,Pigeonpea and Cassava p H value was significantly lower than the other three kinds of shrubs(P < 0.05).The lactic acid content of Cassava was significantly higher than the other four kinds of shrubs(P < 0.05).Pigeonpea acetic acid content was significantly higher than the other four kinds of shrubs(P < 0.05),there was no significant difference between Cassava and Pyracantha(P >0.05).Pyracantha propionic acid content was significantly higher than other 4 kinds of shrubs(P < 0.05).Cassava and Pyracantha butyric acid content was the highest,Solanum deflexicarpum was the lowest(P < 0.05).New leucaena NH3-N/TN was significantly higher than the other 4 kinds of shrubs(P > 0.05).(2)After ensiling,5 kinds of shrubs,the content of NDF,ADF and ADL was significantly decreased(P < 0.05);the content of CP and OM was increased during storage,but the difference was no significant(P > 0.05);the content of EE was significantly increased(P < 0.05).Comprehensive quality indexes of sensory evaluation,fermentation and silage nutrients,determine the Solanum deflexicarpum >Cassava >New leucaena>Pyracantha>Pigeonpea.更多还原