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草业学报  2015 

麻叶荨麻与玉米粉混贮对青贮品质的影响

DOI: 10.11686/cyxb20150123, PP. 190-195

Keywords: 麻叶荨麻,玉米粉,青贮品质,营养价值

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Abstract:

为解析添加玉米粉对麻叶荨麻青贮发酵品质和养分保存效果的影响,将麻叶荨麻与玉米粉5∶1混合调制青贮饲料,将其DM含量提高到310g/kg,以麻叶荨麻单独青贮作为对照。每个处理18个重复,室温袋贮60d后开封取样,测定青贮发酵品质和营养成分及消化率,并分别在贮藏后第0,3,5,15,20和60天调查pH、有机酸、氨态氮的动态变化。结果表明,与玉米粉混合青贮通过快速降低pH和提高乳酸含量而明显加快了麻叶荨麻的发酵进程,发酵前15d,混贮组pH下降速率和乳酸累积速率较单贮组快;混贮组显著降低了(P<0.05)pH、氨态氮、乙酸、丁酸及NDF和ADF含量,显著提高了(P<0.05)乳酸、水溶性碳水化合物(WSC)含量、费氏评分及干物质与纤维组分的体外消化率;脂肪含量在两个处理之间无显著差异。以上结果表明,麻叶荨麻与玉米粉以5∶1混合青贮能够成功保存麻叶荨麻的高品质营养特性,从而生产高品质青贮饲料,同时还能改善家畜对它的利用效率。

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