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草业学报  2014 

不同精粗比和菜粕水平对饲粮组合效应的影响

DOI: 10.11686/cyxb20140135, PP. 291-299

Keywords: 组合效应,小麦秸,氨化小麦秸,菜粕,精粗比

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Abstract:

为了探讨在反刍动物中等或较低水平粗饲料中需要添加能量和蛋白质饲料的量和比例,试验采用体外产气法测定玉米、菜粕和小麦秸或氨化小麦秸在不同精粗比(70∶30,60∶40,50∶50,40∶60,30∶70)和菜粕水平(6%,12%,18%,24%)下各组合及4种饲料分别培养2,4,6,9,12,24,36,48,72,96h内的产气量,并通过24h产气量和各组合的加权估算值计算出各组合的组合效应值。结果表明:1)小麦秸基础料中,15个饲粮组合为负组合效应,而高精粗比70∶30高菜粕水平18%和24%两组合和低精粗比40∶60低菜粕水平6%和12%两组合均表现出正组合效应,且高精粗比70∶30的组合效应值极显著高于低精粗比40∶60和30∶70组(P<0.01)。2)氨化小麦秸基础料中,19个饲粮组合均不同程度地表现出正组合效应值。各精粗比间组合效应值,30∶70组极显著高于70∶30组(P<0.01)。各菜粕水平间组合效应值,24%组显著高于12%组(P<0.05)。低精粗比和高菜粕水平组合时组合效应值最大。使用氨化小麦秸要比使用小麦秸更能充分利用粗饲料,节省精饲料。

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