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日粮纤维来源对生长猪养分消化率的影响

DOI: 10.3969/j.issn.1006-267x.2015.04.010

Keywords: 生长猪,日粮纤维,消化率

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Abstract:

本试验旨在研究3种不同来源的日粮纤维(DF)对生长猪养分和总能(GE)的表观全肠道消化率(ATTD)、表观回肠消化率(AID)及后肠发酵率的影响。试验采用有重复的4×3不完全拉丁方设计,包括4种试验饲粮和3个饲养周期,每个周期12d。这4种饲粮分别为基础饲粮、甜菜粕饲粮、麦麸饲粮和燕麦麸饲粮(3种纤维饲粮分别以20%的甜菜粕、麦麸、燕麦麸替代基础饲粮)。选择8头在回肠末端安装简单T型瘘管的杜×长×大三元杂交阉公猪[初始体重(19.0±1.8)kg],分别在3个饲养周期交替饲喂4种试验饲粮。结果表明:生长猪饲粮干物质(DM)、粗蛋白质(CP)、GE、粗灰分(ash)和碳水化合物(CHO)的ATTD、AID及后肠发酵率均受DF来源的显著影响(P<0.05)。甜菜粕、麦麸和燕麦麸饲粮组DM、GE和CHO的ATTD显著低于基础饲粮组(P<0.05),甜菜粕饲粮组CP的ATTD显著低于其他3种饲粮组(P<0.05)。饲粮组DM、GE、ash和CHO的AID从高到低的顺序为:基础饲粮>燕麦麸、麦麸饲粮>甜菜粕饲粮。甜菜粕与燕麦麸饲粮组CP的AID显著低于其他2种饲粮组(P<0.05)。可溶性日粮纤维(SDF)含量最高的甜菜粕饲粮,其组DM、GE、ash与CHO的后肠发酵率显著高于其他3种饲粮组(P<0.05)。甜菜粕饲粮组DM、GE与CHO的后肠消化率分别比基础饲粮组的高12.4%、7.81%和12.6%(P<0.05)。综上所述,DF来源(麦麸、燕麦麸或甜菜粕)会显著改变生长猪饲粮GE和养分消化率,而富含SDF的甜菜粕可显著提高饲粮各养分在后肠的发酵率。

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