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不同加工工艺对断奶仔猪颗粒饲粮加工质量、生长性能和养分消化率的影响研究

DOI: 10.3969/j.issn.1006-267x.2015.05.021

Keywords: 断奶仔猪,加工工艺,加工质量,生长性能,消化率

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Abstract:

本试验旨在研究不同加工工艺对断奶仔猪颗粒饲粮加工质量、生长性能和养分消化率的影响。分别采用普通制粒、添加膨化玉米低温制粒、大料膨胀低温制粒和二次制粒4种工艺加工断奶仔猪饲粮,分别命名为STP、EXT、EXP和DOP。选取96头平均体重为(8.57±0.87)kg的32日龄"大×长×杜"三元杂交仔猪,随机分为4个组,每组6个重复,每重复4头猪。4组分别饲喂4种加工工艺饲粮,试验期为28d。结果表明:1)与STP组相比,EXT、EXP和DOP组的硬度值分别显著增加了32.87%、38.34%、30.13%(P<0.05);而EXP组的颗粒耐久性指数(PDI)却显著高于其他3组(P<0.05);与STP、DOP组相比,EXT、EXP组的酥脆性显著增强(P<0.05);EXT组的淀粉糊化度达到75%,显著高于其他3组(P<0.05),DOP、EXP组淀粉糊化度分别比STP组显著提高32.70%、30.80%(P<0.05);不同加工工艺对蛋白质溶解度的影响不显著(P>0.05)。2)1~28d仔猪生长试验中,饲喂4种颗粒饲粮对断奶仔猪的平均日增重(ADG)和平均日采食量(ADFI)均没有显著差异(P>0.05),但EXP组仔猪的ADG和ADFI最高,EXP组的料重比(F/G)显著低于STP、EXT组(P<0.05)。3)EXP组干物质消化率显著高于EXT组(P<0.05);DOP组粗灰分消化率比STP、EXT组分别提高了7.6%、6.7%(P<0.05);EXP组总能消化率显著高于STP组(P<0.05);4种工艺对有机物消化率没有显著性的影响(P>0.05);与STP组相比,EXP和DOP组的粗蛋白质消化率分别显著提高3.6%、4.0%(P<0.05)。由此可见,大料膨胀低温制粒工艺和二次制粒工艺加工断奶仔猪饲粮显著改善了仔猪颗粒饲粮的加工质量,提高了断奶仔猪的生长性能、养分消化率。

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